./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-examples/standard_sentinel-2.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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:03:24,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:03:24,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:03:24,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:03:24,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:03:24,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:03:24,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:03:24,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:03:24,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:03:24,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:03:24,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:03:24,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:03:24,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:03:24,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:03:24,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:03:24,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:03:24,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:03:24,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:03:24,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:03:24,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:03:24,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:03:24,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:03:24,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:03:24,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:03:24,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:03:24,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:03:24,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:03:24,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:03:24,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:03:24,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:03:24,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:03:24,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:03:24,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:03:24,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:03:24,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:03:24,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:03:24,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:03:24,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:03:24,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:03:24,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:03:24,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:03:24,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:03:24,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:03:24,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:03:24,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:03:24,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:03:24,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:03:24,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:03:24,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:03:24,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:03:24,753 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:03:24,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:03:24,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:03:24,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:03:24,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:03:24,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:03:24,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:03:24,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:03:24,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:03:24,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:03:24,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:03:24,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:03:24,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:03:24,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:03:24,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:03:24,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:03:24,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:03:24,758 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:03:24,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:03:24,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:03:24,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:03:24,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2021-12-22 08:03:24,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:03:24,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:03:24,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:03:24,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:03:24,965 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:03:24,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-22 08:03:25,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2126af7f3/ea1e19426b3249f0b3ebe3b666c97f91/FLAGdd70912f2 [2021-12-22 08:03:25,373 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:03:25,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-22 08:03:25,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2126af7f3/ea1e19426b3249f0b3ebe3b666c97f91/FLAGdd70912f2 [2021-12-22 08:03:25,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2126af7f3/ea1e19426b3249f0b3ebe3b666c97f91 [2021-12-22 08:03:25,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:03:25,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:03:25,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:03:25,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:03:25,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:03:25,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f4075c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25, skipping insertion in model container [2021-12-22 08:03:25,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:03:25,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:03:25,522 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-examples/standard_sentinel-2.i[852,865] [2021-12-22 08:03:25,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:03:25,534 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:03:25,543 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-examples/standard_sentinel-2.i[852,865] [2021-12-22 08:03:25,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:03:25,554 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:03:25,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25 WrapperNode [2021-12-22 08:03:25,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:03:25,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:03:25,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:03:25,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:03:25,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,576 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-12-22 08:03:25,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:03:25,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:03:25,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:03:25,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:03:25,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:03:25,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:03:25,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:03:25,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:03:25,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (1/1) ... [2021-12-22 08:03:25,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:03:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:25,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:03:25,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:03:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:03:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:03:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:03:25,737 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:03:25,738 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:03:25,826 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:03:25,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:03:25,843 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 08:03:25,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:25 BoogieIcfgContainer [2021-12-22 08:03:25,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:03:25,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:03:25,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:03:25,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:03:25,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:03:25" (1/3) ... [2021-12-22 08:03:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe5a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:25, skipping insertion in model container [2021-12-22 08:03:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:25" (2/3) ... [2021-12-22 08:03:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe5a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:25, skipping insertion in model container [2021-12-22 08:03:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:25" (3/3) ... [2021-12-22 08:03:25,850 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2021-12-22 08:03:25,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:03:25,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:03:25,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:03:25,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:03:25,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:03:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 08:03:25,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:25,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:25,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2021-12-22 08:03:25,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:25,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670687110] [2021-12-22 08:03:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:25,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:03:26,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670687110] [2021-12-22 08:03:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670687110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:03:26,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:03:26,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:03:26,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123610190] [2021-12-22 08:03:26,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:03:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:03:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:03:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:03:26,102 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:26,151 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-22 08:03:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:03:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 08:03:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:26,158 INFO L225 Difference]: With dead ends: 30 [2021-12-22 08:03:26,158 INFO L226 Difference]: Without dead ends: 13 [2021-12-22 08:03:26,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:03:26,162 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 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 [2021-12-22 08:03:26,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:03:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-22 08:03:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-12-22 08:03:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-22 08:03:26,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-22 08:03:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:26,181 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-22 08:03:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-22 08:03:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 08:03:26,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:26,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:26,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:03:26,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2021-12-22 08:03:26,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815400761] [2021-12-22 08:03:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:26,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:03:26,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:26,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815400761] [2021-12-22 08:03:26,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815400761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434376683] [2021-12-22 08:03:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:26,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:26,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:26,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:03:26,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:03:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:03:26,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:03:26,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:03:26,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434376683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:26,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:26,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:03:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622766627] [2021-12-22 08:03:26,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:03:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:03:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:03:26,390 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:26,408 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-12-22 08:03:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:03:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 08:03:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:26,410 INFO L225 Difference]: With dead ends: 25 [2021-12-22 08:03:26,410 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 08:03:26,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:03:26,411 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:26,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:03:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 08:03:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-22 08:03:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-22 08:03:26,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-12-22 08:03:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-22 08:03:26,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-22 08:03:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 08:03:26,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:26,416 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:26,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:03:26,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:26,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2021-12-22 08:03:26,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:26,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080952287] [2021-12-22 08:03:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:26,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 08:03:26,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080952287] [2021-12-22 08:03:26,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080952287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:03:26,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:03:26,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:03:26,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753906039] [2021-12-22 08:03:26,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:03:26,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:03:26,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:03:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:03:26,712 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:26,725 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-22 08:03:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:03:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 08:03:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:26,726 INFO L225 Difference]: With dead ends: 24 [2021-12-22 08:03:26,726 INFO L226 Difference]: Without dead ends: 20 [2021-12-22 08:03:26,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:03:26,728 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:03:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-22 08:03:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-22 08:03:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-22 08:03:26,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-12-22 08:03:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-22 08:03:26,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-22 08:03:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:03:26,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:26,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:26,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:03:26,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2021-12-22 08:03:26,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:26,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542330543] [2021-12-22 08:03:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:26,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:26,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:26,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542330543] [2021-12-22 08:03:26,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542330543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:26,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892222155] [2021-12-22 08:03:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:26,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:26,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:26,817 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) [2021-12-22 08:03:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:03:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:03:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:26,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:26,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892222155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:26,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:26,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 08:03:26,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453959113] [2021-12-22 08:03:26,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:26,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:03:26,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:26,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:03:26,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:03:26,967 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:26,993 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-22 08:03:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:03:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 08:03:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:26,995 INFO L225 Difference]: With dead ends: 41 [2021-12-22 08:03:26,995 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 08:03:26,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:03:26,996 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:26,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:03:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 08:03:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 08:03:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-22 08:03:27,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2021-12-22 08:03:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:27,000 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-22 08:03:27,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-22 08:03:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 08:03:27,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:27,001 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:27,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:03:27,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 08:03:27,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2021-12-22 08:03:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414537150] [2021-12-22 08:03:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:27,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:27,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414537150] [2021-12-22 08:03:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414537150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626785503] [2021-12-22 08:03:27,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:03:27,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:27,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:27,336 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) [2021-12-22 08:03:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:03:27,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:03:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:03:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:03:27,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:27,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:27,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626785503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:27,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:27,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 08:03:27,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828813854] [2021-12-22 08:03:27,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:27,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:03:27,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:03:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:03:27,630 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:27,689 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-12-22 08:03:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 08:03:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-22 08:03:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:27,690 INFO L225 Difference]: With dead ends: 65 [2021-12-22 08:03:27,690 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 08:03:27,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:03:27,691 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:27,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:03:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 08:03:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-22 08:03:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-22 08:03:27,697 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2021-12-22 08:03:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:27,697 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-22 08:03:27,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-22 08:03:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:03:27,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:27,698 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:27,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:03:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:27,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2021-12-22 08:03:27,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010660499] [2021-12-22 08:03:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:27,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:03:28,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:28,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010660499] [2021-12-22 08:03:28,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010660499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:28,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461327748] [2021-12-22 08:03:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:03:28,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:28,192 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) [2021-12-22 08:03:28,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:03:28,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 08:03:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:03:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 08:03:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:28,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 08:03:28,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:03:28,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-22 08:03:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-22 08:03:28,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-22 08:03:28,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461327748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:28,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:28,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-22 08:03:28,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600688385] [2021-12-22 08:03:28,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:28,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 08:03:28,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 08:03:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-12-22 08:03:28,656 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:28,737 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-12-22 08:03:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 08:03:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-22 08:03:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:28,739 INFO L225 Difference]: With dead ends: 72 [2021-12-22 08:03:28,739 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 08:03:28,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 08:03:28,740 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:28,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 45 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2021-12-22 08:03:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 08:03:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-12-22 08:03:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-22 08:03:28,745 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2021-12-22 08:03:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:28,745 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-22 08:03:28,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-22 08:03:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 08:03:28,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:28,746 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:28,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:03:28,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:28,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -978301670, now seen corresponding path program 4 times [2021-12-22 08:03:28,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599453589] [2021-12-22 08:03:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:28,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:29,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599453589] [2021-12-22 08:03:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599453589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097161795] [2021-12-22 08:03:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:03:29,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:29,201 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) [2021-12-22 08:03:29,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 08:03:29,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:03:29,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:03:29,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 08:03:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:30,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097161795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:30,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:30,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-22 08:03:30,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611903175] [2021-12-22 08:03:30,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:30,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-22 08:03:30,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-22 08:03:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:03:30,060 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:30,167 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2021-12-22 08:03:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-22 08:03:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-22 08:03:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:30,169 INFO L225 Difference]: With dead ends: 121 [2021-12-22 08:03:30,169 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 08:03:30,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:03:30,171 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:30,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 34 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:03:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 08:03:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-12-22 08:03:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-12-22 08:03:30,177 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 59 [2021-12-22 08:03:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-12-22 08:03:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-12-22 08:03:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 08:03:30,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:30,179 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:30,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 08:03:30,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:30,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1840451240, now seen corresponding path program 5 times [2021-12-22 08:03:30,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:30,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995609143] [2021-12-22 08:03:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:30,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:31,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:31,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995609143] [2021-12-22 08:03:31,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995609143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:31,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566881071] [2021-12-22 08:03:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:03:31,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:31,398 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) [2021-12-22 08:03:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 08:03:45,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-22 08:03:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:03:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-22 08:03:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:45,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:47,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566881071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:47,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:47,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-22 08:03:47,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701168904] [2021-12-22 08:03:47,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:47,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-22 08:03:47,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:47,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-22 08:03:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 08:03:47,697 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:47,928 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2021-12-22 08:03:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-22 08:03:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-22 08:03:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:47,931 INFO L225 Difference]: With dead ends: 221 [2021-12-22 08:03:47,932 INFO L226 Difference]: Without dead ends: 210 [2021-12-22 08:03:47,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 08:03:47,935 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:47,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 42 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:03:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-22 08:03:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-12-22 08:03:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2021-12-22 08:03:47,954 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 109 [2021-12-22 08:03:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:47,954 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2021-12-22 08:03:47,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2021-12-22 08:03:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-22 08:03:47,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:47,959 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:48,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 08:03:48,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:48,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash -788516028, now seen corresponding path program 6 times [2021-12-22 08:03:48,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417301523] [2021-12-22 08:03:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:48,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:03:51,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417301523] [2021-12-22 08:03:51,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417301523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119431581] [2021-12-22 08:03:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:03:51,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:51,551 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) [2021-12-22 08:03:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 08:03:51,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-22 08:03:51,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:03:51,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 08:03:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:51,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 08:03:52,150 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-12-22 08:03:52,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-12-22 08:03:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-22 08:03:52,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:03:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-22 08:03:52,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119431581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:03:52,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:03:52,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 8, 8] total 112 [2021-12-22 08:03:52,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801149167] [2021-12-22 08:03:52,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:03:52,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-22 08:03:52,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:03:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-22 08:03:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5093, Invalid=7339, Unknown=0, NotChecked=0, Total=12432 [2021-12-22 08:03:52,860 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:03:53,350 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2021-12-22 08:03:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-22 08:03:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-12-22 08:03:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:03:53,351 INFO L225 Difference]: With dead ends: 232 [2021-12-22 08:03:53,351 INFO L226 Difference]: Without dead ends: 217 [2021-12-22 08:03:53,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5127, Invalid=8445, Unknown=0, NotChecked=0, Total=13572 [2021-12-22 08:03:53,354 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:03:53,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 49 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 271 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-12-22 08:03:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-22 08:03:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2021-12-22 08:03:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2021-12-22 08:03:53,363 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 209 [2021-12-22 08:03:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:03:53,363 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2021-12-22 08:03:53,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:03:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2021-12-22 08:03:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-22 08:03:53,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:03:53,365 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:03:53,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 08:03:53,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:53,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:03:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:03:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1692188344, now seen corresponding path program 7 times [2021-12-22 08:03:53,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:03:53,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73806565] [2021-12-22 08:03:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:03:53,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:03:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:03:56,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:03:56,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73806565] [2021-12-22 08:03:56,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73806565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:03:56,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753847656] [2021-12-22 08:03:56,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:03:56,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:03:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:03:56,725 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) [2021-12-22 08:03:56,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 08:03:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:03:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-22 08:03:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:03:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:03:57,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:04:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753847656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:04,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-22 08:04:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117900565] [2021-12-22 08:04:04,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:04,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-22 08:04:04,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-22 08:04:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-22 08:04:04,733 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:05,347 INFO L93 Difference]: Finished difference Result 433 states and 535 transitions. [2021-12-22 08:04:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-22 08:04:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-22 08:04:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:05,349 INFO L225 Difference]: With dead ends: 433 [2021-12-22 08:04:05,349 INFO L226 Difference]: Without dead ends: 418 [2021-12-22 08:04:05,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-22 08:04:05,352 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:05,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 50 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:04:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-22 08:04:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-12-22 08:04:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2021-12-22 08:04:05,364 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 215 [2021-12-22 08:04:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:05,365 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2021-12-22 08:04:05,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2021-12-22 08:04:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-22 08:04:05,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:05,369 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:05,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:04:05,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 08:04:05,587 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash 995929774, now seen corresponding path program 8 times [2021-12-22 08:04:05,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940464514] [2021-12-22 08:04:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:05,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:04:14,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940464514] [2021-12-22 08:04:14,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940464514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:14,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087271] [2021-12-22 08:04:14,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:04:14,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:14,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:14,436 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) [2021-12-22 08:04:14,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 08:04:14,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:04:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:04:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-22 08:04:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:04:15,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 08:04:36,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:36,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:36,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2021-12-22 08:04:36,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181159603] [2021-12-22 08:04:36,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-12-22 08:04:36,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-12-22 08:04:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-22 08:04:36,894 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:39,964 INFO L93 Difference]: Finished difference Result 837 states and 1040 transitions. [2021-12-22 08:04:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-12-22 08:04:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2021-12-22 08:04:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:39,968 INFO L225 Difference]: With dead ends: 837 [2021-12-22 08:04:39,968 INFO L226 Difference]: Without dead ends: 822 [2021-12-22 08:04:39,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-22 08:04:39,974 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:39,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 42 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 08:04:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-12-22 08:04:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-12-22 08:04:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.002436053593179) internal successors, (823), 821 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 823 transitions. [2021-12-22 08:04:39,989 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 823 transitions. Word has length 417 [2021-12-22 08:04:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 823 transitions. [2021-12-22 08:04:39,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 823 transitions. [2021-12-22 08:04:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-22 08:04:40,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:40,003 INFO L514 BasicCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:40,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 08:04:40,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:40,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -616313830, now seen corresponding path program 9 times [2021-12-22 08:04:40,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:40,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051719206] [2021-12-22 08:04:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:40,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat