./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label31.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 030ee26298bd2420f8f616fb27ee842ae3e86a11841315b0a84bebf89a7dcbb5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:55:16,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:55:16,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:55:16,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:55:16,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:55:16,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:55:16,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:55:16,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:55:16,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:55:16,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:55:16,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:55:16,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:55:16,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:55:16,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:55:16,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:55:16,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:55:16,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:55:16,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:55:16,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:55:16,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:55:16,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:55:16,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:55:16,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:55:16,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:55:16,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:55:16,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:55:16,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:55:16,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:55:16,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:55:16,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:55:16,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:55:16,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:55:16,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:55:16,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:55:16,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:55:16,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:55:16,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:55:16,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:55:16,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:55:16,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:55:16,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:55:16,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:55:16,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:55:16,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:55:16,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:55:16,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:55:16,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:55:16,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:55:16,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:55:16,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:55:16,817 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:55:16,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:55:16,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:55:16,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:55:16,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:55:16,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:55:16,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:55:16,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:55:16,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:55:16,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:55:16,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:55:16,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:16,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:55:16,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:55:16,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:55:16,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:55:16,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:55:16,822 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:55:16,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:55:16,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:55:16,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:55:16,823 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030ee26298bd2420f8f616fb27ee842ae3e86a11841315b0a84bebf89a7dcbb5 [2021-12-15 09:55:17,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:55:17,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:55:17,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:55:17,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:55:17,113 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:55:17,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2021-12-15 09:55:17,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2de4c7d/da2a71d5d5da4852b775c909919caf57/FLAG8e0567227 [2021-12-15 09:55:17,697 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:55:17,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2021-12-15 09:55:17,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2de4c7d/da2a71d5d5da4852b775c909919caf57/FLAG8e0567227 [2021-12-15 09:55:17,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2de4c7d/da2a71d5d5da4852b775c909919caf57 [2021-12-15 09:55:17,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:55:17,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:55:17,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:17,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:55:17,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:55:17,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:17" (1/1) ... [2021-12-15 09:55:17,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214eb2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:17, skipping insertion in model container [2021-12-15 09:55:17,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:17" (1/1) ... [2021-12-15 09:55:17,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:55:18,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:55:18,261 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label31.c[1200,1213] [2021-12-15 09:55:18,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:18,628 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:55:18,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label31.c[1200,1213] [2021-12-15 09:55:18,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:18,804 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:55:18,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18 WrapperNode [2021-12-15 09:55:18,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:18,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:18,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:55:18,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:55:18,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:18,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:18,960 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 09:55:18,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:18,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:55:18,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:55:18,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:55:18,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:18,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:18,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:18,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:19,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:19,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:19,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:19,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:55:19,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:55:19,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:55:19,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:55:19,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (1/1) ... [2021-12-15 09:55:19,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:19,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:55:19,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:55:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:55:19,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:55:19,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:55:19,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:55:19,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:55:19,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:55:21,071 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:55:21,081 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:55:21,082 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:55:21,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:21 BoogieIcfgContainer [2021-12-15 09:55:21,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:55:21,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:55:21,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:55:21,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:55:21,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:55:17" (1/3) ... [2021-12-15 09:55:21,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54469f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:21, skipping insertion in model container [2021-12-15 09:55:21,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:18" (2/3) ... [2021-12-15 09:55:21,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54469f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:21, skipping insertion in model container [2021-12-15 09:55:21,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:21" (3/3) ... [2021-12-15 09:55:21,092 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label31.c [2021-12-15 09:55:21,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:55:21,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:55:21,153 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:55:21,163 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:55:21,163 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:55:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 09:55:21,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:21,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:21,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash 297966002, now seen corresponding path program 1 times [2021-12-15 09:55:21,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:21,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965072191] [2021-12-15 09:55:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:21,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:21,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965072191] [2021-12-15 09:55:21,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965072191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:21,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:21,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:21,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159089919] [2021-12-15 09:55:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:21,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:21,426 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:23,004 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-15 09:55:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 09:55:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:23,024 INFO L225 Difference]: With dead ends: 1137 [2021-12-15 09:55:23,024 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 09:55:23,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:23,031 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 378 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:23,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 60 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:55:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 09:55:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 09:55:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7639939485627836) internal successors, (1166), 661 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1166 transitions. [2021-12-15 09:55:23,092 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1166 transitions. Word has length 8 [2021-12-15 09:55:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:23,093 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1166 transitions. [2021-12-15 09:55:23,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1166 transitions. [2021-12-15 09:55:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 09:55:23,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:23,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:23,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:55:23,097 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1914501160, now seen corresponding path program 1 times [2021-12-15 09:55:23,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:23,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869054494] [2021-12-15 09:55:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:23,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:23,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869054494] [2021-12-15 09:55:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869054494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:23,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:23,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294762280] [2021-12-15 09:55:23,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:23,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:23,198 INFO L87 Difference]: Start difference. First operand 662 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:24,464 INFO L93 Difference]: Finished difference Result 1980 states and 3493 transitions. [2021-12-15 09:55:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:24,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 73 [2021-12-15 09:55:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:24,471 INFO L225 Difference]: With dead ends: 1980 [2021-12-15 09:55:24,471 INFO L226 Difference]: Without dead ends: 1320 [2021-12-15 09:55:24,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:24,474 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 344 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:24,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:55:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-15 09:55:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-15 09:55:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.6656557998483699) internal successors, (2197), 1319 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2197 transitions. [2021-12-15 09:55:24,512 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2197 transitions. Word has length 73 [2021-12-15 09:55:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:24,512 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2197 transitions. [2021-12-15 09:55:24,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2197 transitions. [2021-12-15 09:55:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 09:55:24,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:24,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:24,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:55:24,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1671992652, now seen corresponding path program 1 times [2021-12-15 09:55:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:24,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956681455] [2021-12-15 09:55:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:24,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:24,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:24,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956681455] [2021-12-15 09:55:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956681455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:24,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:24,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:24,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792389440] [2021-12-15 09:55:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:24,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:24,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:24,663 INFO L87 Difference]: Start difference. First operand 1320 states and 2197 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:26,733 INFO L93 Difference]: Finished difference Result 3625 states and 5926 transitions. [2021-12-15 09:55:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:55:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 09:55:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:26,742 INFO L225 Difference]: With dead ends: 3625 [2021-12-15 09:55:26,742 INFO L226 Difference]: Without dead ends: 2307 [2021-12-15 09:55:26,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:26,745 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1003 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:26,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 41 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:55:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-12-15 09:55:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2021-12-15 09:55:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.5034692107545533) internal successors, (3467), 2306 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3467 transitions. [2021-12-15 09:55:26,791 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3467 transitions. Word has length 76 [2021-12-15 09:55:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3467 transitions. [2021-12-15 09:55:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3467 transitions. [2021-12-15 09:55:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 09:55:26,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:26,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:26,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:55:26,795 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1291218399, now seen corresponding path program 1 times [2021-12-15 09:55:26,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702556594] [2021-12-15 09:55:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:26,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:26,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702556594] [2021-12-15 09:55:26,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702556594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:26,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:26,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:26,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078017043] [2021-12-15 09:55:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:26,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:26,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:26,879 INFO L87 Difference]: Start difference. First operand 2307 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:27,969 INFO L93 Difference]: Finished difference Result 4941 states and 7580 transitions. [2021-12-15 09:55:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-12-15 09:55:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:27,982 INFO L225 Difference]: With dead ends: 4941 [2021-12-15 09:55:27,982 INFO L226 Difference]: Without dead ends: 2965 [2021-12-15 09:55:27,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:27,988 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 376 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:27,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 540 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-15 09:55:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2021-12-15 09:55:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 1.4321862348178138) internal successors, (4245), 2964 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4245 transitions. [2021-12-15 09:55:28,054 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4245 transitions. Word has length 95 [2021-12-15 09:55:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:28,055 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 4245 transitions. [2021-12-15 09:55:28,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4245 transitions. [2021-12-15 09:55:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:55:28,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:28,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:28,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:55:28,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1559288977, now seen corresponding path program 1 times [2021-12-15 09:55:28,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515637331] [2021-12-15 09:55:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-15 09:55:28,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515637331] [2021-12-15 09:55:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515637331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:28,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:28,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:28,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484206258] [2021-12-15 09:55:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:28,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:28,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:28,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:28,196 INFO L87 Difference]: Start difference. First operand 2965 states and 4245 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:29,335 INFO L93 Difference]: Finished difference Result 8231 states and 12060 transitions. [2021-12-15 09:55:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-12-15 09:55:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:29,355 INFO L225 Difference]: With dead ends: 8231 [2021-12-15 09:55:29,355 INFO L226 Difference]: Without dead ends: 5597 [2021-12-15 09:55:29,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:29,360 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 247 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:29,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 241 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:55:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-12-15 09:55:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2021-12-15 09:55:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.2975339528234453) internal successors, (7261), 5596 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7261 transitions. [2021-12-15 09:55:29,469 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7261 transitions. Word has length 196 [2021-12-15 09:55:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:29,472 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 7261 transitions. [2021-12-15 09:55:29,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7261 transitions. [2021-12-15 09:55:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-15 09:55:29,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:29,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:29,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:55:29,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash 708113610, now seen corresponding path program 1 times [2021-12-15 09:55:29,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:29,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350893506] [2021-12-15 09:55:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:29,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:55:29,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350893506] [2021-12-15 09:55:29,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350893506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:29,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:29,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:29,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957193404] [2021-12-15 09:55:29,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:29,631 INFO L87 Difference]: Start difference. First operand 5597 states and 7261 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:30,714 INFO L93 Difference]: Finished difference Result 14153 states and 18437 transitions. [2021-12-15 09:55:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 275 [2021-12-15 09:55:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:30,739 INFO L225 Difference]: With dead ends: 14153 [2021-12-15 09:55:30,740 INFO L226 Difference]: Without dead ends: 7571 [2021-12-15 09:55:30,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:30,748 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:30,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-12-15 09:55:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 6584. [2021-12-15 09:55:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 1.0742822421388425) internal successors, (7072), 6583 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 7072 transitions. [2021-12-15 09:55:30,869 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 7072 transitions. Word has length 275 [2021-12-15 09:55:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:30,870 INFO L470 AbstractCegarLoop]: Abstraction has 6584 states and 7072 transitions. [2021-12-15 09:55:30,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 7072 transitions. [2021-12-15 09:55:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-15 09:55:30,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:30,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:30,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:55:30,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1013347389, now seen corresponding path program 1 times [2021-12-15 09:55:30,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461870308] [2021-12-15 09:55:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:30,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:55:31,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:31,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461870308] [2021-12-15 09:55:31,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461870308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:31,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:31,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273267016] [2021-12-15 09:55:31,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:31,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:31,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:31,071 INFO L87 Difference]: Start difference. First operand 6584 states and 7072 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:32,006 INFO L93 Difference]: Finished difference Result 15798 states and 17037 transitions. [2021-12-15 09:55:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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 339 [2021-12-15 09:55:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:32,039 INFO L225 Difference]: With dead ends: 15798 [2021-12-15 09:55:32,039 INFO L226 Difference]: Without dead ends: 9545 [2021-12-15 09:55:32,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:32,048 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:32,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 43 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-12-15 09:55:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 9545. [2021-12-15 09:55:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 9544 states have (on average 1.073658843252305) internal successors, (10247), 9544 states have internal predecessors, (10247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 10247 transitions. [2021-12-15 09:55:32,185 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 10247 transitions. Word has length 339 [2021-12-15 09:55:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 10247 transitions. [2021-12-15 09:55:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 10247 transitions. [2021-12-15 09:55:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-15 09:55:32,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:32,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:32,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:55:32,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -802025041, now seen corresponding path program 1 times [2021-12-15 09:55:32,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650149271] [2021-12-15 09:55:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:32,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 09:55:32,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650149271] [2021-12-15 09:55:32,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650149271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597642811] [2021-12-15 09:55:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:32,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:32,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:55:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:55:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:55:33,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597642811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:33,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:33,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:55:33,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330282816] [2021-12-15 09:55:33,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:33,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:33,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:33,156 INFO L87 Difference]: Start difference. First operand 9545 states and 10247 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:34,061 INFO L93 Difference]: Finished difference Result 22049 states and 23760 transitions. [2021-12-15 09:55:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2021-12-15 09:55:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:34,081 INFO L225 Difference]: With dead ends: 22049 [2021-12-15 09:55:34,082 INFO L226 Difference]: Without dead ends: 13164 [2021-12-15 09:55:34,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:34,092 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:34,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 38 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-15 09:55:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 11519. [2021-12-15 09:55:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.071279736065289) internal successors, (12339), 11518 states have internal predecessors, (12339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 12339 transitions. [2021-12-15 09:55:34,299 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 12339 transitions. Word has length 347 [2021-12-15 09:55:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:34,300 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 12339 transitions. [2021-12-15 09:55:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 12339 transitions. [2021-12-15 09:55:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-15 09:55:34,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:34,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:34,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:34,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:34,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1317333560, now seen corresponding path program 1 times [2021-12-15 09:55:34,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:34,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494808231] [2021-12-15 09:55:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:34,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-15 09:55:34,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494808231] [2021-12-15 09:55:34,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494808231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666049233] [2021-12-15 09:55:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:34,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:34,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:55:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:55:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-15 09:55:35,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:35,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666049233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:35,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:35,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:55:35,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808872381] [2021-12-15 09:55:35,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:35,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:35,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:35,406 INFO L87 Difference]: Start difference. First operand 11519 states and 12339 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:36,200 INFO L93 Difference]: Finished difference Result 25339 states and 27199 transitions. [2021-12-15 09:55:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 401 [2021-12-15 09:55:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:36,225 INFO L225 Difference]: With dead ends: 25339 [2021-12-15 09:55:36,226 INFO L226 Difference]: Without dead ends: 14151 [2021-12-15 09:55:36,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:36,239 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 326 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:36,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 434 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-15 09:55:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13822. [2021-12-15 09:55:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0638159322769698) internal successors, (14703), 13821 states have internal predecessors, (14703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14703 transitions. [2021-12-15 09:55:36,462 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14703 transitions. Word has length 401 [2021-12-15 09:55:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:36,462 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14703 transitions. [2021-12-15 09:55:36,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14703 transitions. [2021-12-15 09:55:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-15 09:55:36,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:36,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:36,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:36,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 09:55:36,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -125202502, now seen corresponding path program 1 times [2021-12-15 09:55:36,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061467392] [2021-12-15 09:55:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:36,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-12-15 09:55:36,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061467392] [2021-12-15 09:55:36,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061467392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371310116] [2021-12-15 09:55:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:36,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:36,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:55:36,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:55:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 09:55:37,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:37,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371310116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:37,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:37,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:55:37,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963166430] [2021-12-15 09:55:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:37,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:37,894 INFO L87 Difference]: Start difference. First operand 13822 states and 14703 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:38,786 INFO L93 Difference]: Finished difference Result 15798 states and 16729 transitions. [2021-12-15 09:55:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:38,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 462 [2021-12-15 09:55:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:38,815 INFO L225 Difference]: With dead ends: 15798 [2021-12-15 09:55:38,815 INFO L226 Difference]: Without dead ends: 15796 [2021-12-15 09:55:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:38,821 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:38,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 75 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-15 09:55:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 14151. [2021-12-15 09:55:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0629681978798586) internal successors, (15041), 14150 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 15041 transitions. [2021-12-15 09:55:39,024 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 15041 transitions. Word has length 462 [2021-12-15 09:55:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:39,025 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 15041 transitions. [2021-12-15 09:55:39,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 15041 transitions. [2021-12-15 09:55:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2021-12-15 09:55:39,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:39,045 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:39,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:55:39,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:39,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 482511417, now seen corresponding path program 1 times [2021-12-15 09:55:39,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:39,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453667695] [2021-12-15 09:55:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:39,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1319 proven. 0 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-12-15 09:55:39,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453667695] [2021-12-15 09:55:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453667695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:39,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:39,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:39,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377810887] [2021-12-15 09:55:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:39,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:39,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:39,707 INFO L87 Difference]: Start difference. First operand 14151 states and 15041 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:40,447 INFO L93 Difference]: Finished difference Result 28300 states and 30086 transitions. [2021-12-15 09:55:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 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 1183 [2021-12-15 09:55:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:40,474 INFO L225 Difference]: With dead ends: 28300 [2021-12-15 09:55:40,474 INFO L226 Difference]: Without dead ends: 14480 [2021-12-15 09:55:40,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:40,487 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 102 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-15 09:55:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-12-15 09:55:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0620208577940466) internal successors, (15377), 14479 states have internal predecessors, (15377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 15377 transitions. [2021-12-15 09:55:40,703 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 15377 transitions. Word has length 1183 [2021-12-15 09:55:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:40,704 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 15377 transitions. [2021-12-15 09:55:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 15377 transitions. [2021-12-15 09:55:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2021-12-15 09:55:40,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:40,733 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:55:40,734 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash -395334107, now seen corresponding path program 1 times [2021-12-15 09:55:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746437992] [2021-12-15 09:55:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1635 proven. 0 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-12-15 09:55:41,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:41,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746437992] [2021-12-15 09:55:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746437992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:41,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:41,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:41,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836025084] [2021-12-15 09:55:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:41,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:41,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:41,234 INFO L87 Difference]: Start difference. First operand 14480 states and 15377 transitions. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:42,038 INFO L93 Difference]: Finished difference Result 28300 states and 30085 transitions. [2021-12-15 09:55:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:42,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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 1191 [2021-12-15 09:55:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:42,064 INFO L225 Difference]: With dead ends: 28300 [2021-12-15 09:55:42,065 INFO L226 Difference]: Without dead ends: 14480 [2021-12-15 09:55:42,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:42,078 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 222 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:42,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 427 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-15 09:55:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14151. [2021-12-15 09:55:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0453710247349823) internal successors, (14792), 14150 states have internal predecessors, (14792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14792 transitions. [2021-12-15 09:55:42,274 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14792 transitions. Word has length 1191 [2021-12-15 09:55:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:42,275 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14792 transitions. [2021-12-15 09:55:42,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14792 transitions. [2021-12-15 09:55:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1193 [2021-12-15 09:55:42,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:42,297 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:42,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:55:42,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -55319084, now seen corresponding path program 1 times [2021-12-15 09:55:42,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:42,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459132270] [2021-12-15 09:55:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:42,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 1607 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-12-15 09:55:42,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459132270] [2021-12-15 09:55:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459132270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:42,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:42,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 09:55:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224492742] [2021-12-15 09:55:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:55:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:55:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:42,829 INFO L87 Difference]: Start difference. First operand 14151 states and 14792 transitions. Second operand has 6 states, 6 states have (on average 128.5) internal successors, (771), 6 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:43,980 INFO L93 Difference]: Finished difference Result 28409 states and 29704 transitions. [2021-12-15 09:55:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 09:55:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 128.5) internal successors, (771), 6 states have internal predecessors, (771), 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 1192 [2021-12-15 09:55:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:43,998 INFO L225 Difference]: With dead ends: 28409 [2021-12-15 09:55:43,998 INFO L226 Difference]: Without dead ends: 14918 [2021-12-15 09:55:44,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:55:44,010 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 753 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:44,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 566 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14918 states. [2021-12-15 09:55:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14918 to 14809. [2021-12-15 09:55:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.0436925985953538) internal successors, (15455), 14808 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15455 transitions. [2021-12-15 09:55:44,230 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15455 transitions. Word has length 1192 [2021-12-15 09:55:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 15455 transitions. [2021-12-15 09:55:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.5) internal successors, (771), 6 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15455 transitions. [2021-12-15 09:55:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2021-12-15 09:55:44,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:44,254 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:44,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:55:44,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2114144611, now seen corresponding path program 1 times [2021-12-15 09:55:44,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625966747] [2021-12-15 09:55:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:44,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2258 backedges. 1629 proven. 0 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-15 09:55:44,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625966747] [2021-12-15 09:55:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625966747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:44,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:44,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:55:44,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387387161] [2021-12-15 09:55:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:44,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:44,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:44,693 INFO L87 Difference]: Start difference. First operand 14809 states and 15455 transitions. Second operand has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:45,710 INFO L93 Difference]: Finished difference Result 28986 states and 30269 transitions. [2021-12-15 09:55:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:55:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 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 1206 [2021-12-15 09:55:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:45,725 INFO L225 Difference]: With dead ends: 28986 [2021-12-15 09:55:45,725 INFO L226 Difference]: Without dead ends: 14837 [2021-12-15 09:55:45,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:45,734 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 264 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:45,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 449 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:55:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-12-15 09:55:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 14480. [2021-12-15 09:55:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0439256854755163) internal successors, (15115), 14479 states have internal predecessors, (15115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 15115 transitions. [2021-12-15 09:55:45,898 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 15115 transitions. Word has length 1206 [2021-12-15 09:55:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:45,899 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 15115 transitions. [2021-12-15 09:55:45,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 15115 transitions. [2021-12-15 09:55:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2021-12-15 09:55:45,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:45,928 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:45,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:55:45,929 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1142541379, now seen corresponding path program 1 times [2021-12-15 09:55:45,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:45,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541850720] [2021-12-15 09:55:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:45,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2514 backedges. 1715 proven. 0 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-12-15 09:55:46,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541850720] [2021-12-15 09:55:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541850720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:46,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:46,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:55:46,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68272012] [2021-12-15 09:55:46,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:46,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:46,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:46,384 INFO L87 Difference]: Start difference. First operand 14480 states and 15115 transitions. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:47,314 INFO L93 Difference]: Finished difference Result 28408 states and 29669 transitions. [2021-12-15 09:55:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:55:47,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 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 1246 [2021-12-15 09:55:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:47,330 INFO L225 Difference]: With dead ends: 28408 [2021-12-15 09:55:47,330 INFO L226 Difference]: Without dead ends: 14588 [2021-12-15 09:55:47,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:47,340 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 168 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:47,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 566 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14588 states. [2021-12-15 09:55:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14588 to 14480. [2021-12-15 09:55:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0430968989571103) internal successors, (15103), 14479 states have internal predecessors, (15103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 15103 transitions. [2021-12-15 09:55:47,516 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 15103 transitions. Word has length 1246 [2021-12-15 09:55:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:47,517 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 15103 transitions. [2021-12-15 09:55:47,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 15103 transitions. [2021-12-15 09:55:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2021-12-15 09:55:47,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:47,543 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:47,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:55:47,543 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1303669636, now seen corresponding path program 1 times [2021-12-15 09:55:47,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023869305] [2021-12-15 09:55:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:47,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 1511 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-15 09:55:47,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:47,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023869305] [2021-12-15 09:55:47,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023869305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:47,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:47,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:47,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441477103] [2021-12-15 09:55:47,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:47,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:47,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:47,988 INFO L87 Difference]: Start difference. First operand 14480 states and 15103 transitions. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:48,686 INFO L93 Difference]: Finished difference Result 28958 states and 30207 transitions. [2021-12-15 09:55:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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 1258 [2021-12-15 09:55:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:48,703 INFO L225 Difference]: With dead ends: 28958 [2021-12-15 09:55:48,704 INFO L226 Difference]: Without dead ends: 15138 [2021-12-15 09:55:48,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:48,715 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 225 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:48,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 437 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2021-12-15 09:55:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 15138. [2021-12-15 09:55:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15138 states, 15137 states have (on average 1.0414877452599591) internal successors, (15765), 15137 states have internal predecessors, (15765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15765 transitions. [2021-12-15 09:55:48,892 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15765 transitions. Word has length 1258 [2021-12-15 09:55:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:48,893 INFO L470 AbstractCegarLoop]: Abstraction has 15138 states and 15765 transitions. [2021-12-15 09:55:48,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15765 transitions. [2021-12-15 09:55:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1313 [2021-12-15 09:55:48,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:48,920 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:48,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:55:48,920 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1706280919, now seen corresponding path program 1 times [2021-12-15 09:55:48,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413581559] [2021-12-15 09:55:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:48,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2870 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2021-12-15 09:55:49,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:49,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413581559] [2021-12-15 09:55:49,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413581559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:49,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:49,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:49,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366656952] [2021-12-15 09:55:49,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:49,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:49,338 INFO L87 Difference]: Start difference. First operand 15138 states and 15765 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:50,024 INFO L93 Difference]: Finished difference Result 30603 states and 31872 transitions. [2021-12-15 09:55:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 1312 [2021-12-15 09:55:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:50,038 INFO L225 Difference]: With dead ends: 30603 [2021-12-15 09:55:50,039 INFO L226 Difference]: Without dead ends: 14809 [2021-12-15 09:55:50,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:50,048 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 328 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:50,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 421 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2021-12-15 09:55:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14151. [2021-12-15 09:55:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0306713780918728) internal successors, (14584), 14150 states have internal predecessors, (14584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14584 transitions. [2021-12-15 09:55:50,250 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14584 transitions. Word has length 1312 [2021-12-15 09:55:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14584 transitions. [2021-12-15 09:55:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14584 transitions. [2021-12-15 09:55:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1340 [2021-12-15 09:55:50,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:50,268 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:50,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:55:50,269 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash -459521164, now seen corresponding path program 1 times [2021-12-15 09:55:50,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:50,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891347125] [2021-12-15 09:55:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:50,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 1615 proven. 962 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:55:50,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891347125] [2021-12-15 09:55:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891347125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718209285] [2021-12-15 09:55:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:50,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:50,788 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 09:55:50,826 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 09:55:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 1637 proven. 0 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2021-12-15 09:55:52,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:52,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718209285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:52,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:52,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-15 09:55:52,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140782093] [2021-12-15 09:55:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:52,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:52,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:55:52,933 INFO L87 Difference]: Start difference. First operand 14151 states and 14584 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:53,604 INFO L93 Difference]: Finished difference Result 27642 states and 28499 transitions. [2021-12-15 09:55:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 1339 [2021-12-15 09:55:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:53,618 INFO L225 Difference]: With dead ends: 27642 [2021-12-15 09:55:53,618 INFO L226 Difference]: Without dead ends: 14151 [2021-12-15 09:55:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:55:53,626 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 94 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:53,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 377 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-15 09:55:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13822. [2021-12-15 09:55:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0272049779321322) internal successors, (14197), 13821 states have internal predecessors, (14197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14197 transitions. [2021-12-15 09:55:53,788 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14197 transitions. Word has length 1339 [2021-12-15 09:55:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:53,789 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14197 transitions. [2021-12-15 09:55:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14197 transitions. [2021-12-15 09:55:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1528 [2021-12-15 09:55:53,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:53,805 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:53,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:54,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:55:54,014 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash 161772060, now seen corresponding path program 1 times [2021-12-15 09:55:54,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:54,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049539008] [2021-12-15 09:55:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:54,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 2481 proven. 66 refuted. 0 times theorem prover too weak. 1455 trivial. 0 not checked. [2021-12-15 09:55:54,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049539008] [2021-12-15 09:55:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049539008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646787853] [2021-12-15 09:55:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:54,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:54,514 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 09:55:54,559 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 09:55:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:54,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:55:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1969 proven. 0 refuted. 0 times theorem prover too weak. 2033 trivial. 0 not checked. [2021-12-15 09:55:57,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646787853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:57,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:57,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 09:55:57,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759005166] [2021-12-15 09:55:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:57,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:57,893 INFO L87 Difference]: Start difference. First operand 13822 states and 14197 transitions. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:58,623 INFO L93 Difference]: Finished difference Result 26984 states and 27725 transitions. [2021-12-15 09:55:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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 1527 [2021-12-15 09:55:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:58,636 INFO L225 Difference]: With dead ends: 26984 [2021-12-15 09:55:58,636 INFO L226 Difference]: Without dead ends: 13822 [2021-12-15 09:55:58,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1526 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:58,644 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 86 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:58,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 87 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-15 09:55:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2021-12-15 09:55:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0271326242674192) internal successors, (14196), 13821 states have internal predecessors, (14196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14196 transitions. [2021-12-15 09:55:58,751 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14196 transitions. Word has length 1527 [2021-12-15 09:55:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:58,752 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14196 transitions. [2021-12-15 09:55:58,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14196 transitions. [2021-12-15 09:55:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2021-12-15 09:55:58,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:58,773 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:58,792 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 09:55:58,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:58,977 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash 404888093, now seen corresponding path program 1 times [2021-12-15 09:55:58,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:58,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548137016] [2021-12-15 09:55:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:58,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4587 backedges. 1976 proven. 156 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2021-12-15 09:55:59,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548137016] [2021-12-15 09:55:59,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548137016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541601933] [2021-12-15 09:55:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:59,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:59,478 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 09:55:59,479 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 09:55:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:55:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4587 backedges. 2132 proven. 0 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2021-12-15 09:56:02,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541601933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:02,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:56:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861264183] [2021-12-15 09:56:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:02,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:02,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:02,402 INFO L87 Difference]: Start difference. First operand 13822 states and 14196 transitions. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:03,470 INFO L93 Difference]: Finished difference Result 29945 states and 30786 transitions. [2021-12-15 09:56:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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 1557 [2021-12-15 09:56:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:03,487 INFO L225 Difference]: With dead ends: 29945 [2021-12-15 09:56:03,488 INFO L226 Difference]: Without dead ends: 16783 [2021-12-15 09:56:03,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1561 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:03,497 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:03,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:56:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-12-15 09:56:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 14480. [2021-12-15 09:56:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.024311071206575) internal successors, (14831), 14479 states have internal predecessors, (14831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14831 transitions. [2021-12-15 09:56:03,642 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14831 transitions. Word has length 1557 [2021-12-15 09:56:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:03,643 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14831 transitions. [2021-12-15 09:56:03,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14831 transitions. [2021-12-15 09:56:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1793 [2021-12-15 09:56:03,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:03,678 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:03,704 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 09:56:03,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:03,903 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -759416482, now seen corresponding path program 1 times [2021-12-15 09:56:03,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044744383] [2021-12-15 09:56:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:03,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 3298 proven. 1506 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2021-12-15 09:56:04,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044744383] [2021-12-15 09:56:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044744383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059050283] [2021-12-15 09:56:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:04,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:04,763 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 09:56:04,765 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 09:56:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 09:56:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates...