./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem13_label47.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:45:22,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:45:22,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:45:22,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:45:22,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:45:22,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:45:22,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:45:22,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:45:22,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:45:22,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:45:22,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:45:22,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:45:22,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:45:22,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:45:22,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:45:22,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:45:22,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:45:22,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:45:22,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:45:22,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:45:22,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:45:22,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:45:22,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:45:22,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:45:22,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:45:22,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:45:22,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:45:22,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:45:22,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:45:22,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:45:22,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:45:22,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:45:22,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:45:22,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:45:22,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:45:22,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:45:22,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:45:22,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:45:22,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:45:22,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:45:22,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:45:22,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:45:22,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:45:22,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:45:22,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:45:22,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:45:22,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:45:22,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:45:22,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:45:22,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:45:22,804 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:45:22,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:45:22,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:45:22,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:45:22,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:45:22,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:45:22,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:45:22,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:45:22,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:45:22,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:45:22,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:22,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:45:22,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:45:22,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:45:22,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:45:22,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:45:22,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:45:22,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:45:22,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:45:22,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:45:22,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 [2021-12-15 09:45:23,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:45:23,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:45:23,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:45:23,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:45:23,047 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:45:23,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-15 09:45:23,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd5e1ffd/a1f1f081cd1a40b2a6ef09668ca719fc/FLAGc7033d3f7 [2021-12-15 09:45:23,698 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:45:23,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-15 09:45:23,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd5e1ffd/a1f1f081cd1a40b2a6ef09668ca719fc/FLAGc7033d3f7 [2021-12-15 09:45:24,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd5e1ffd/a1f1f081cd1a40b2a6ef09668ca719fc [2021-12-15 09:45:24,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:45:24,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:45:24,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:24,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:45:24,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:45:24,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:24" (1/1) ... [2021-12-15 09:45:24,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168a9319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:24, skipping insertion in model container [2021-12-15 09:45:24,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:24" (1/1) ... [2021-12-15 09:45:24,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:45:24,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:45:24,387 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/eca-rers2012/Problem13_label47.c[6189,6202] [2021-12-15 09:45:25,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:25,074 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:45:25,103 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/eca-rers2012/Problem13_label47.c[6189,6202] [2021-12-15 09:45:25,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:25,489 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:45:25,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25 WrapperNode [2021-12-15 09:45:25,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:25,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:25,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:45:25,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:45:25,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:25,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,011 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:45:26,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:26,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:45:26,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:45:26,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:45:26,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:45:26,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:45:26,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:45:26,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:45:26,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (1/1) ... [2021-12-15 09:45:26,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:26,499 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) [2021-12-15 09:45:26,571 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 [2021-12-15 09:45:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:45:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:45:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:45:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:45:26,656 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:45:26,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:45:29,898 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:45:29,915 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:45:29,915 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:45:29,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:29 BoogieIcfgContainer [2021-12-15 09:45:29,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:45:29,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:45:29,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:45:29,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:45:29,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:45:24" (1/3) ... [2021-12-15 09:45:29,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e803572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:29, skipping insertion in model container [2021-12-15 09:45:29,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:25" (2/3) ... [2021-12-15 09:45:29,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e803572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:29, skipping insertion in model container [2021-12-15 09:45:29,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:29" (3/3) ... [2021-12-15 09:45:29,925 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label47.c [2021-12-15 09:45:29,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:45:29,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:45:29,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:45:29,983 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 [2021-12-15 09:45:29,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:45:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-12-15 09:45:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 09:45:30,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:30,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:30,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-15 09:45:30,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:30,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53559479] [2021-12-15 09:45:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:30,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:30,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53559479] [2021-12-15 09:45:30,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53559479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:30,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:30,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:30,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846372060] [2021-12-15 09:45:30,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:30,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:30,236 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:34,303 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-15 09:45:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-15 09:45:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:34,333 INFO L225 Difference]: With dead ends: 3160 [2021-12-15 09:45:34,333 INFO L226 Difference]: Without dead ends: 1983 [2021-12-15 09:45:34,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:34,350 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1060 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:34,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-15 09:45:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-15 09:45:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-15 09:45:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 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) [2021-12-15 09:45:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-15 09:45:34,459 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 43 [2021-12-15 09:45:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:34,460 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-15 09:45:34,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-15 09:45:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 09:45:34,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:34,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:34,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:45:34,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1763711674, now seen corresponding path program 1 times [2021-12-15 09:45:34,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553668464] [2021-12-15 09:45:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:34,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:34,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:34,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553668464] [2021-12-15 09:45:34,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553668464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:34,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:34,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:34,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148048063] [2021-12-15 09:45:34,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:34,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:34,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:34,634 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:39,882 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-15 09:45:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 09:45:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:39,912 INFO L225 Difference]: With dead ends: 6254 [2021-12-15 09:45:39,912 INFO L226 Difference]: Without dead ends: 4326 [2021-12-15 09:45:39,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:45:39,917 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2617 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4155 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:39,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 1037 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4155 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 09:45:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-15 09:45:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-15 09:45:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.5293845441925036) internal successors, (6610), 4322 states have internal predecessors, (6610), 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) [2021-12-15 09:45:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6610 transitions. [2021-12-15 09:45:39,986 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6610 transitions. Word has length 108 [2021-12-15 09:45:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:39,987 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6610 transitions. [2021-12-15 09:45:39,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6610 transitions. [2021-12-15 09:45:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-15 09:45:39,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:39,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:45:39,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 739782231, now seen corresponding path program 1 times [2021-12-15 09:45:39,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:39,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096209937] [2021-12-15 09:45:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:39,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:40,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:40,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096209937] [2021-12-15 09:45:40,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096209937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:45:40,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191179476] [2021-12-15 09:45:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:40,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:40,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:40,284 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) [2021-12-15 09:45:40,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:45:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:40,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:45:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:45:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 09:45:40,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:45:40,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191179476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:40,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:45:40,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:45:40,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109571257] [2021-12-15 09:45:40,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:40,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:40,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:40,683 INFO L87 Difference]: Start difference. First operand 4323 states and 6610 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-12-15 09:45:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:43,904 INFO L93 Difference]: Finished difference Result 11043 states and 17775 transitions. [2021-12-15 09:45:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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 168 [2021-12-15 09:45:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:43,946 INFO L225 Difference]: With dead ends: 11043 [2021-12-15 09:45:43,947 INFO L226 Difference]: Without dead ends: 7509 [2021-12-15 09:45:43,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:43,955 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 743 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:43,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1184 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:45:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-12-15 09:45:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 7489. [2021-12-15 09:45:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7489 states, 7488 states have (on average 1.3767361111111112) internal successors, (10309), 7488 states have internal predecessors, (10309), 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) [2021-12-15 09:45:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7489 states to 7489 states and 10309 transitions. [2021-12-15 09:45:44,082 INFO L78 Accepts]: Start accepts. Automaton has 7489 states and 10309 transitions. Word has length 168 [2021-12-15 09:45:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:44,084 INFO L470 AbstractCegarLoop]: Abstraction has 7489 states and 10309 transitions. [2021-12-15 09:45:44,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-12-15 09:45:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7489 states and 10309 transitions. [2021-12-15 09:45:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-15 09:45:44,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:44,090 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:44,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:45:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:44,300 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1528917195, now seen corresponding path program 1 times [2021-12-15 09:45:44,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87809526] [2021-12-15 09:45:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:44,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:45:44,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:44,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87809526] [2021-12-15 09:45:44,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87809526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:44,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:44,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:44,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609042536] [2021-12-15 09:45:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:44,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:44,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:44,414 INFO L87 Difference]: Start difference. First operand 7489 states and 10309 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 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) [2021-12-15 09:45:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:47,438 INFO L93 Difference]: Finished difference Result 20514 states and 28842 transitions. [2021-12-15 09:45:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 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 210 [2021-12-15 09:45:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:47,487 INFO L225 Difference]: With dead ends: 20514 [2021-12-15 09:45:47,488 INFO L226 Difference]: Without dead ends: 13814 [2021-12-15 09:45:47,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:47,502 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 908 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:47,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 942 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:45:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2021-12-15 09:45:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 13805. [2021-12-15 09:45:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13805 states, 13804 states have (on average 1.2959287163141118) internal successors, (17889), 13804 states have internal predecessors, (17889), 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) [2021-12-15 09:45:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13805 states to 13805 states and 17889 transitions. [2021-12-15 09:45:47,745 INFO L78 Accepts]: Start accepts. Automaton has 13805 states and 17889 transitions. Word has length 210 [2021-12-15 09:45:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:47,746 INFO L470 AbstractCegarLoop]: Abstraction has 13805 states and 17889 transitions. [2021-12-15 09:45:47,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 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) [2021-12-15 09:45:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13805 states and 17889 transitions. [2021-12-15 09:45:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-15 09:45:47,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:47,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:47,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:45:47,750 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1408513717, now seen corresponding path program 1 times [2021-12-15 09:45:47,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109903176] [2021-12-15 09:45:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:47,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:47,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109903176] [2021-12-15 09:45:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109903176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:47,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:47,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:47,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650780821] [2021-12-15 09:45:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:47,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:47,844 INFO L87 Difference]: Start difference. First operand 13805 states and 17889 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2021-12-15 09:45:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:53,234 INFO L93 Difference]: Finished difference Result 38804 states and 51109 transitions. [2021-12-15 09:45:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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 240 [2021-12-15 09:45:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:53,285 INFO L225 Difference]: With dead ends: 38804 [2021-12-15 09:45:53,285 INFO L226 Difference]: Without dead ends: 25788 [2021-12-15 09:45:53,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:53,301 INFO L933 BasicCegarLoop]: 1077 mSDtfsCounter, 1642 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 5860 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 5860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:53,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1642 Valid, 1248 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 5860 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 09:45:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-12-15 09:45:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 25646. [2021-12-15 09:45:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25646 states, 25645 states have (on average 1.2608305712614545) internal successors, (32334), 25645 states have internal predecessors, (32334), 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) [2021-12-15 09:45:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 32334 transitions. [2021-12-15 09:45:53,580 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 32334 transitions. Word has length 240 [2021-12-15 09:45:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:53,580 INFO L470 AbstractCegarLoop]: Abstraction has 25646 states and 32334 transitions. [2021-12-15 09:45:53,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2021-12-15 09:45:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 32334 transitions. [2021-12-15 09:45:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-12-15 09:45:53,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:53,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:53,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:45:53,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:53,589 INFO L85 PathProgramCache]: Analyzing trace with hash -799759290, now seen corresponding path program 1 times [2021-12-15 09:45:53,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:53,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901537441] [2021-12-15 09:45:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:53,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-15 09:45:53,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:53,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901537441] [2021-12-15 09:45:53,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901537441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:53,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:53,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:53,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799108163] [2021-12-15 09:45:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:53,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:53,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:53,726 INFO L87 Difference]: Start difference. First operand 25646 states and 32334 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-12-15 09:45:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:56,703 INFO L93 Difference]: Finished difference Result 71749 states and 91166 transitions. [2021-12-15 09:45:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 282 [2021-12-15 09:45:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:56,767 INFO L225 Difference]: With dead ends: 71749 [2021-12-15 09:45:56,767 INFO L226 Difference]: Without dead ends: 46892 [2021-12-15 09:45:56,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:56,784 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 853 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:56,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 991 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:45:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46892 states. [2021-12-15 09:45:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46892 to 43740. [2021-12-15 09:45:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43740 states, 43739 states have (on average 1.194608930245319) internal successors, (52251), 43739 states have internal predecessors, (52251), 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) [2021-12-15 09:45:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43740 states to 43740 states and 52251 transitions. [2021-12-15 09:45:57,220 INFO L78 Accepts]: Start accepts. Automaton has 43740 states and 52251 transitions. Word has length 282 [2021-12-15 09:45:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:57,220 INFO L470 AbstractCegarLoop]: Abstraction has 43740 states and 52251 transitions. [2021-12-15 09:45:57,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-12-15 09:45:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 43740 states and 52251 transitions. [2021-12-15 09:45:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 09:45:57,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:57,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:57,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:45:57,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1853881210, now seen corresponding path program 1 times [2021-12-15 09:45:57,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207782232] [2021-12-15 09:45:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:57,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:45:57,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:57,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207782232] [2021-12-15 09:45:57,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207782232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:57,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:57,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:57,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115368468] [2021-12-15 09:45:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:57,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:57,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:57,324 INFO L87 Difference]: Start difference. First operand 43740 states and 52251 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-12-15 09:46:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:03,815 INFO L93 Difference]: Finished difference Result 113679 states and 137630 transitions. [2021-12-15 09:46:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:46:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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 283 [2021-12-15 09:46:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:03,920 INFO L225 Difference]: With dead ends: 113679 [2021-12-15 09:46:03,920 INFO L226 Difference]: Without dead ends: 70728 [2021-12-15 09:46:03,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:46:03,961 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 1762 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6132 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 7261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 6132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:03,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 828 Invalid, 7261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 6132 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 09:46:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70728 states. [2021-12-15 09:46:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70728 to 53991. [2021-12-15 09:46:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53991 states, 53990 states have (on average 1.1828116317836637) internal successors, (63860), 53990 states have internal predecessors, (63860), 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) [2021-12-15 09:46:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53991 states to 53991 states and 63860 transitions. [2021-12-15 09:46:04,636 INFO L78 Accepts]: Start accepts. Automaton has 53991 states and 63860 transitions. Word has length 283 [2021-12-15 09:46:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:04,636 INFO L470 AbstractCegarLoop]: Abstraction has 53991 states and 63860 transitions. [2021-12-15 09:46:04,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-12-15 09:46:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53991 states and 63860 transitions. [2021-12-15 09:46:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-15 09:46:04,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:04,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:04,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:46:04,642 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 972475612, now seen corresponding path program 1 times [2021-12-15 09:46:04,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:04,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932226848] [2021-12-15 09:46:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:04,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:46:04,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932226848] [2021-12-15 09:46:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932226848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:04,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:04,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:04,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16822876] [2021-12-15 09:46:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:04,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:04,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:04,723 INFO L87 Difference]: Start difference. First operand 53991 states and 63860 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:08,229 INFO L93 Difference]: Finished difference Result 131603 states and 158219 transitions. [2021-12-15 09:46:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2021-12-15 09:46:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:08,332 INFO L225 Difference]: With dead ends: 131603 [2021-12-15 09:46:08,332 INFO L226 Difference]: Without dead ends: 78401 [2021-12-15 09:46:08,361 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 [2021-12-15 09:46:08,362 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 789 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:08,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1067 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:46:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78401 states. [2021-12-15 09:46:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78401 to 76028. [2021-12-15 09:46:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 1.1725045049784946) internal successors, (89142), 76027 states have internal predecessors, (89142), 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) [2021-12-15 09:46:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 89142 transitions. [2021-12-15 09:46:09,238 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 89142 transitions. Word has length 341 [2021-12-15 09:46:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:09,239 INFO L470 AbstractCegarLoop]: Abstraction has 76028 states and 89142 transitions. [2021-12-15 09:46:09,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 89142 transitions. [2021-12-15 09:46:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-15 09:46:09,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:09,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:09,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:46:09,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2021351561, now seen corresponding path program 1 times [2021-12-15 09:46:09,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:09,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025253604] [2021-12-15 09:46:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:09,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:46:09,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025253604] [2021-12-15 09:46:09,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025253604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:09,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:09,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:09,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854451877] [2021-12-15 09:46:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:09,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:09,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:09,331 INFO L87 Difference]: Start difference. First operand 76028 states and 89142 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2021-12-15 09:46:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:12,720 INFO L93 Difference]: Finished difference Result 152091 states and 178353 transitions. [2021-12-15 09:46:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 369 [2021-12-15 09:46:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:12,896 INFO L225 Difference]: With dead ends: 152091 [2021-12-15 09:46:12,896 INFO L226 Difference]: Without dead ends: 76852 [2021-12-15 09:46:12,918 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 [2021-12-15 09:46:12,919 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:12,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1993 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:46:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76852 states. [2021-12-15 09:46:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76852 to 76816. [2021-12-15 09:46:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76816 states, 76815 states have (on average 1.155568573846254) internal successors, (88765), 76815 states have internal predecessors, (88765), 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) [2021-12-15 09:46:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76816 states to 76816 states and 88765 transitions. [2021-12-15 09:46:13,666 INFO L78 Accepts]: Start accepts. Automaton has 76816 states and 88765 transitions. Word has length 369 [2021-12-15 09:46:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:13,666 INFO L470 AbstractCegarLoop]: Abstraction has 76816 states and 88765 transitions. [2021-12-15 09:46:13,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2021-12-15 09:46:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 76816 states and 88765 transitions. [2021-12-15 09:46:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-15 09:46:13,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:13,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:46:13,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1007739519, now seen corresponding path program 1 times [2021-12-15 09:46:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906398486] [2021-12-15 09:46:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 307 proven. 110 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:46:14,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906398486] [2021-12-15 09:46:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906398486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:46:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590025763] [2021-12-15 09:46:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:14,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:14,030 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) [2021-12-15 09:46:14,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:46:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:46:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:46:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-15 09:46:14,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:46:14,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590025763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:14,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:46:14,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:46:14,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372772372] [2021-12-15 09:46:14,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:14,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:14,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:14,623 INFO L87 Difference]: Start difference. First operand 76816 states and 88765 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2021-12-15 09:46:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:17,630 INFO L93 Difference]: Finished difference Result 169362 states and 195258 transitions. [2021-12-15 09:46:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 398 [2021-12-15 09:46:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:17,730 INFO L225 Difference]: With dead ends: 169362 [2021-12-15 09:46:17,730 INFO L226 Difference]: Without dead ends: 90177 [2021-12-15 09:46:17,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:17,764 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 859 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:17,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1888 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:46:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90177 states. [2021-12-15 09:46:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90177 to 82296. [2021-12-15 09:46:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82296 states, 82295 states have (on average 1.1472385928671243) internal successors, (94412), 82295 states have internal predecessors, (94412), 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) [2021-12-15 09:46:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82296 states to 82296 states and 94412 transitions. [2021-12-15 09:46:18,720 INFO L78 Accepts]: Start accepts. Automaton has 82296 states and 94412 transitions. Word has length 398 [2021-12-15 09:46:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:18,721 INFO L470 AbstractCegarLoop]: Abstraction has 82296 states and 94412 transitions. [2021-12-15 09:46:18,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2021-12-15 09:46:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 82296 states and 94412 transitions. [2021-12-15 09:46:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-12-15 09:46:18,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:18,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:18,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:46:18,938 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,SelfDestructingSolverStorable9 [2021-12-15 09:46:18,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1070237854, now seen corresponding path program 1 times [2021-12-15 09:46:18,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:18,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358859796] [2021-12-15 09:46:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:18,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 322 proven. 110 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:46:19,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358859796] [2021-12-15 09:46:19,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358859796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:46:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593557526] [2021-12-15 09:46:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:19,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:19,169 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) [2021-12-15 09:46:19,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:46:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:46:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:46:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:46:20,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:46:20,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593557526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:20,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:46:20,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:46:20,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286105892] [2021-12-15 09:46:20,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:20,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:20,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:20,011 INFO L87 Difference]: Start difference. First operand 82296 states and 94412 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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) [2021-12-15 09:46:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:23,197 INFO L93 Difference]: Finished difference Result 173242 states and 200706 transitions. [2021-12-15 09:46:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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 473 [2021-12-15 09:46:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:23,299 INFO L225 Difference]: With dead ends: 173242 [2021-12-15 09:46:23,299 INFO L226 Difference]: Without dead ends: 91735 [2021-12-15 09:46:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:23,341 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 1138 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:23,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 409 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:46:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91735 states.