./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.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/loops-crafted-1/mono-crafted_7.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 ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:56:00,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:56:00,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:56:00,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:56:00,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:56:00,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:56:00,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:56:00,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:56:00,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:56:00,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:56:00,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:56:00,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:56:00,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:56:00,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:56:00,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:56:00,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:56:00,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:56:00,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:56:00,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:56:00,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:56:00,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:56:00,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:56:00,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:56:00,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:56:00,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:56:00,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:56:00,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:56:00,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:56:00,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:56:00,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:56:00,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:56:00,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:56:00,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:56:00,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:56:00,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:56:00,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:56:00,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:56:00,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:56:00,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:56:00,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:56:00,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:56:00,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:56:00,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:56:00,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:56:00,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:56:00,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:56:00,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:56:00,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:56:00,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:56:00,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:56:00,867 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:56:00,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:56:00,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:56:00,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:56:00,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:56:00,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:56:00,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:56:00,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:56:00,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:56:00,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:56:00,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:56:00,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:56:00,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:56:00,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:56:00,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:56:00,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:56:00,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:56:00,872 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:56:00,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:56:00,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:56:00,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:56:00,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 [2021-12-15 10:56:01,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:56:01,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:56:01,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:56:01,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:56:01,198 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:56:01,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-12-15 10:56:01,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc71b5ef3/6c66efb520d8426bbf0c669e8cac44a7/FLAGb16f306e0 [2021-12-15 10:56:01,685 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:56:01,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-12-15 10:56:01,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc71b5ef3/6c66efb520d8426bbf0c669e8cac44a7/FLAGb16f306e0 [2021-12-15 10:56:01,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc71b5ef3/6c66efb520d8426bbf0c669e8cac44a7 [2021-12-15 10:56:01,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:56:01,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:56:01,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:56:01,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:56:01,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:56:01,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634e75b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01, skipping insertion in model container [2021-12-15 10:56:01,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:56:01,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:56:01,868 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/loops-crafted-1/mono-crafted_7.c[318,331] [2021-12-15 10:56:01,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:56:01,888 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:56:01,901 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/loops-crafted-1/mono-crafted_7.c[318,331] [2021-12-15 10:56:01,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:56:01,918 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:56:01,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01 WrapperNode [2021-12-15 10:56:01,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:56:01,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:56:01,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:56:01,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:56:01,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,949 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-12-15 10:56:01,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:56:01,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:56:01,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:56:01,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:56:01,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:56:01,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:56:01,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:56:01,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:56:01,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (1/1) ... [2021-12-15 10:56:01,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:56:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:02,013 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 10:56:02,023 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 10:56:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:56:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:56:02,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:56:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:56:02,107 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:56:02,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:56:02,242 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:56:02,247 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:56:02,250 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:56:02,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:02 BoogieIcfgContainer [2021-12-15 10:56:02,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:56:02,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:56:02,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:56:02,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:56:02,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:56:01" (1/3) ... [2021-12-15 10:56:02,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da544d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:02, skipping insertion in model container [2021-12-15 10:56:02,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:01" (2/3) ... [2021-12-15 10:56:02,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da544d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:02, skipping insertion in model container [2021-12-15 10:56:02,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:02" (3/3) ... [2021-12-15 10:56:02,267 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2021-12-15 10:56:02,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:56:02,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:56:02,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:56:02,332 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 10:56:02,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:56:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 10:56:02,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:02,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:02,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-12-15 10:56:02,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178989460] [2021-12-15 10:56:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,508 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 10:56:02,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178989460] [2021-12-15 10:56:02,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178989460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:56:02,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:56:02,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:56:02,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489247566] [2021-12-15 10:56:02,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:56:02,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:56:02,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:56:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:56:02,593 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 10:56:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:02,605 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-12-15 10:56:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:56:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-15 10:56:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:02,613 INFO L225 Difference]: With dead ends: 22 [2021-12-15 10:56:02,614 INFO L226 Difference]: Without dead ends: 9 [2021-12-15 10:56:02,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:56:02,621 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:02,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-15 10:56:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-15 10:56:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-12-15 10:56:02,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-12-15 10:56:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:02,648 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-12-15 10:56:02,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 10:56:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-12-15 10:56:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 10:56:02,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:02,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:56:02,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-12-15 10:56:02,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732172512] [2021-12-15 10:56:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,765 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 10:56:02,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732172512] [2021-12-15 10:56:02,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732172512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:56:02,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:56:02,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:56:02,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453951146] [2021-12-15 10:56:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:56:02,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:56:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:56:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:02,771 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10:56:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:02,791 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-12-15 10:56:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:56:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-12-15 10:56:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:02,793 INFO L225 Difference]: With dead ends: 18 [2021-12-15 10:56:02,794 INFO L226 Difference]: Without dead ends: 11 [2021-12-15 10:56:02,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:56:02,798 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:02,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-15 10:56:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-15 10:56:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-12-15 10:56:02,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-12-15 10:56:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:02,804 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-12-15 10:56:02,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10:56:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-12-15 10:56:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 10:56:02,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:02,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:02,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:56:02,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-12-15 10:56:02,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116594651] [2021-12-15 10:56:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:02,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116594651] [2021-12-15 10:56:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116594651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:56:02,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:56:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:56:02,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800753483] [2021-12-15 10:56:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:56:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:56:02,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:56:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:02,852 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10:56:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:02,862 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-15 10:56:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:56:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-12-15 10:56:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:02,864 INFO L225 Difference]: With dead ends: 16 [2021-12-15 10:56:02,864 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 10:56:02,865 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 10:56:02,871 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:02,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 10:56:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-15 10:56:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 10:56:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-15 10:56:02,881 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-12-15 10:56:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:02,881 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-15 10:56:02,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10:56:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-15 10:56:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 10:56:02,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:02,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:02,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:56:02,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-12-15 10:56:02,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980880551] [2021-12-15 10:56:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:02,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980880551] [2021-12-15 10:56:02,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980880551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687421849] [2021-12-15 10:56:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:02,945 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 10:56:02,947 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 10:56:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:56:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:03,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687421849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:03,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:03,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 10:56:03,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962458357] [2021-12-15 10:56:03,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:03,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:56:03,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:56:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:56:03,063 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 10:56:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:03,090 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2021-12-15 10:56:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:56:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 10 [2021-12-15 10:56:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:03,091 INFO L225 Difference]: With dead ends: 25 [2021-12-15 10:56:03,091 INFO L226 Difference]: Without dead ends: 17 [2021-12-15 10:56:03,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:56:03,092 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:03,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-15 10:56:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-15 10:56:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 10:56:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-15 10:56:03,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-12-15 10:56:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:03,097 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-15 10:56:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 10:56:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-15 10:56:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 10:56:03,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:03,098 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:03,125 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 10:56:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:03,316 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash -693598994, now seen corresponding path program 1 times [2021-12-15 10:56:03,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:03,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280738610] [2021-12-15 10:56:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:03,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:03,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280738610] [2021-12-15 10:56:03,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280738610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947722799] [2021-12-15 10:56:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:03,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:03,358 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 10:56:03,359 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 10:56:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:56:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:03,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947722799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:03,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:03,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 10:56:03,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105923750] [2021-12-15 10:56:03,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:03,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:56:03,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:56:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:56:03,481 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 10:56:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:03,508 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-15 10:56:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 10:56:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 16 [2021-12-15 10:56:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:03,509 INFO L225 Difference]: With dead ends: 36 [2021-12-15 10:56:03,509 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 10:56:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:56:03,511 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:03,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 10:56:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-15 10:56:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 10:56:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-15 10:56:03,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-12-15 10:56:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-15 10:56:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 10:56:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-15 10:56:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:56:03,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:03,517 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:03,543 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 10:56:03,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:03,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 219186682, now seen corresponding path program 2 times [2021-12-15 10:56:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197082281] [2021-12-15 10:56:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:03,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:03,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197082281] [2021-12-15 10:56:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197082281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616120847] [2021-12-15 10:56:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:56:03,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:03,828 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 10:56:03,832 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 10:56:03,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:56:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:56:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:03,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:04,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616120847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:04,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:04,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-15 10:56:04,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431635091] [2021-12-15 10:56:04,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:04,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 10:56:04,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 10:56:04,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:56:04,172 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 10:56:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:04,233 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-12-15 10:56:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:56:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 24 [2021-12-15 10:56:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:04,237 INFO L225 Difference]: With dead ends: 52 [2021-12-15 10:56:04,237 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 10:56:04,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:56:04,239 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:04,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 10:56:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-15 10:56:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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 10:56:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-15 10:56:04,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2021-12-15 10:56:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:04,249 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-15 10:56:04,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 10:56:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-15 10:56:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 10:56:04,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:04,250 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:04,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:04,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:04,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1801004050, now seen corresponding path program 3 times [2021-12-15 10:56:04,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381401512] [2021-12-15 10:56:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:04,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:04,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381401512] [2021-12-15 10:56:04,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381401512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890221994] [2021-12-15 10:56:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:56:04,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:04,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:04,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:56:04,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:56:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 10:56:04,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-15 10:56:04,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-15 10:56:05,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890221994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:05,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:05,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2021-12-15 10:56:05,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555472375] [2021-12-15 10:56:05,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:05,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 10:56:05,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 10:56:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-15 10:56:05,012 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 10:56:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:05,256 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-12-15 10:56:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 10:56:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 40 [2021-12-15 10:56:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:05,257 INFO L225 Difference]: With dead ends: 63 [2021-12-15 10:56:05,257 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 10:56:05,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 10:56:05,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:05,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 37 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:56:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 10:56:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-12-15 10:56:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-15 10:56:05,265 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2021-12-15 10:56:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:05,265 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-15 10:56:05,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 10:56:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-15 10:56:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 10:56:05,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:05,267 INFO L514 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:05,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 10:56:05,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:05,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:05,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1274064215, now seen corresponding path program 4 times [2021-12-15 10:56:05,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:05,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409478515] [2021-12-15 10:56:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:05,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:05,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409478515] [2021-12-15 10:56:05,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409478515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936600910] [2021-12-15 10:56:05,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:56:05,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:05,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:05,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:56:05,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:56:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 10:56:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:06,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936600910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:06,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:06,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-15 10:56:06,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127396058] [2021-12-15 10:56:06,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:06,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 10:56:06,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 10:56:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:56:06,282 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:06,383 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2021-12-15 10:56:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 10:56:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 10:56:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:06,387 INFO L225 Difference]: With dead ends: 94 [2021-12-15 10:56:06,387 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 10:56:06,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:56:06,388 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:06,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:56:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 10:56:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-15 10:56:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 10:56:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-12-15 10:56:06,406 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 45 [2021-12-15 10:56:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:06,407 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-12-15 10:56:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-12-15 10:56:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 10:56:06,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:06,411 INFO L514 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:06,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:06,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:06,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash -194287964, now seen corresponding path program 5 times [2021-12-15 10:56:06,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:06,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911216780] [2021-12-15 10:56:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:06,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:07,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:07,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911216780] [2021-12-15 10:56:07,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911216780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105418347] [2021-12-15 10:56:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:56:07,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:07,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:56:07,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-15 10:56:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-15 10:56:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:07,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:08,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105418347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:08,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:08,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-12-15 10:56:08,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072398887] [2021-12-15 10:56:08,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:08,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-15 10:56:08,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-15 10:56:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 10:56:08,792 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 10:56:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:08,999 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2021-12-15 10:56:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-15 10:56:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 79 [2021-12-15 10:56:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:09,001 INFO L225 Difference]: With dead ends: 162 [2021-12-15 10:56:09,001 INFO L226 Difference]: Without dead ends: 148 [2021-12-15 10:56:09,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 10:56:09,004 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:09,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-15 10:56:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-15 10:56:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 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 10:56:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2021-12-15 10:56:09,015 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 79 [2021-12-15 10:56:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:09,015 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2021-12-15 10:56:09,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 10:56:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2021-12-15 10:56:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-15 10:56:09,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:09,017 INFO L514 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:09,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:09,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:09,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 568323966, now seen corresponding path program 6 times [2021-12-15 10:56:09,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533884445] [2021-12-15 10:56:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:09,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:56:10,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533884445] [2021-12-15 10:56:10,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533884445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717964706] [2021-12-15 10:56:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:56:10,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:10,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:10,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:56:10,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-15 10:56:10,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:10,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:56:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2021-12-15 10:56:11,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2021-12-15 10:56:11,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717964706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:11,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:11,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2021-12-15 10:56:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222499845] [2021-12-15 10:56:11,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:11,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-15 10:56:11,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-15 10:56:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 10:56:11,761 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 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 10:56:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:13,723 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2021-12-15 10:56:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-15 10:56:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 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 147 [2021-12-15 10:56:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:13,725 INFO L225 Difference]: With dead ends: 176 [2021-12-15 10:56:13,725 INFO L226 Difference]: Without dead ends: 162 [2021-12-15 10:56:13,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2021-12-15 10:56:13,729 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:13,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 49 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-15 10:56:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2021-12-15 10:56:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 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 10:56:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2021-12-15 10:56:13,738 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 147 [2021-12-15 10:56:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:13,739 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2021-12-15 10:56:13,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 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 10:56:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2021-12-15 10:56:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-15 10:56:13,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:13,741 INFO L514 BasicCegarLoop]: trace histogram [69, 67, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:13,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 10:56:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:13,963 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1924451707, now seen corresponding path program 7 times [2021-12-15 10:56:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036565402] [2021-12-15 10:56:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:13,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:15,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036565402] [2021-12-15 10:56:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036565402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953148771] [2021-12-15 10:56:15,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:56:15,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:15,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:15,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:56:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:15,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-15 10:56:15,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:16,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:20,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953148771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:20,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:20,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2021-12-15 10:56:20,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695941856] [2021-12-15 10:56:20,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:20,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-15 10:56:20,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-15 10:56:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-15 10:56:20,576 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 10:56:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:20,934 INFO L93 Difference]: Finished difference Result 314 states and 389 transitions. [2021-12-15 10:56:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-15 10:56:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 155 [2021-12-15 10:56:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:20,936 INFO L225 Difference]: With dead ends: 314 [2021-12-15 10:56:20,937 INFO L226 Difference]: Without dead ends: 294 [2021-12-15 10:56:20,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-15 10:56:20,939 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:20,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-15 10:56:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-12-15 10:56:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 293 states have internal predecessors, (297), 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 10:56:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2021-12-15 10:56:20,952 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 155 [2021-12-15 10:56:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:20,953 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2021-12-15 10:56:20,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 10:56:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2021-12-15 10:56:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-15 10:56:20,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:20,956 INFO L514 BasicCegarLoop]: trace histogram [138, 136, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:20,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 10:56:21,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 10:56:21,172 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash 25602028, now seen corresponding path program 8 times [2021-12-15 10:56:21,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:21,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893519637] [2021-12-15 10:56:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:21,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:27,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893519637] [2021-12-15 10:56:27,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893519637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034846262] [2021-12-15 10:56:27,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:56:27,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:27,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:27,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:56:27,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:56:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-15 10:56:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:27,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 10:56:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034846262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:45,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:45,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2021-12-15 10:56:45,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394792422] [2021-12-15 10:56:45,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:45,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2021-12-15 10:56:45,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2021-12-15 10:56:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-15 10:56:45,263 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 10:56:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:46,481 INFO L93 Difference]: Finished difference Result 590 states and 734 transitions. [2021-12-15 10:56:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-12-15 10:56:46,482 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 293 [2021-12-15 10:56:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:46,484 INFO L225 Difference]: With dead ends: 590 [2021-12-15 10:56:46,484 INFO L226 Difference]: Without dead ends: 570 [2021-12-15 10:56:46,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-15 10:56:46,488 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:46,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 10:56:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-15 10:56:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-12-15 10:56:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.0070298769771528) internal successors, (573), 569 states have internal predecessors, (573), 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 10:56:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 573 transitions. [2021-12-15 10:56:46,508 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 573 transitions. Word has length 293 [2021-12-15 10:56:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:46,508 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 573 transitions. [2021-12-15 10:56:46,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 10:56:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 573 transitions. [2021-12-15 10:56:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-12-15 10:56:46,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:46,518 INFO L514 BasicCegarLoop]: trace histogram [276, 274, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:46,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:46,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:46,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -515641074, now seen corresponding path program 9 times [2021-12-15 10:56:46,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591415585] [2021-12-15 10:56:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:46,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat