./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label37.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/Problem19_label37.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 3ac46a6c4d9bc7297b40bc12f5914a2752e0cec6b52579c95d26ee7a4d471018 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:08:26,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:08:26,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:08:26,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:08:26,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:08:26,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:08:26,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:08:26,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:08:27,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:08:27,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:08:27,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:08:27,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:08:27,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:08:27,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:08:27,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:08:27,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:08:27,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:08:27,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:08:27,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:08:27,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:08:27,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:08:27,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:08:27,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:08:27,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:08:27,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:08:27,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:08:27,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:08:27,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:08:27,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:08:27,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:08:27,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:08:27,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:08:27,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:08:27,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:08:27,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:08:27,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:08:27,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:08:27,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:08:27,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:08:27,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:08:27,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:08:27,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:08:27,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:08:27,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:08:27,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:08:27,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:08:27,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:08:27,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:08:27,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:08:27,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:08:27,071 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:08:27,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:08:27,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:08:27,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:08:27,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:08:27,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:08:27,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:08:27,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:08:27,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:08:27,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:08:27,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:08:27,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:08:27,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:08:27,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:08:27,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:08:27,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:08:27,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ac46a6c4d9bc7297b40bc12f5914a2752e0cec6b52579c95d26ee7a4d471018 [2021-12-15 10:08:27,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:08:27,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:08:27,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:08:27,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:08:27,312 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:08:27,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2021-12-15 10:08:27,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481eee9b6/51a2131e93ab448294fac5e2b0beffd5/FLAG95f6b4f75 [2021-12-15 10:08:27,995 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:08:27,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2021-12-15 10:08:28,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481eee9b6/51a2131e93ab448294fac5e2b0beffd5/FLAG95f6b4f75 [2021-12-15 10:08:28,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481eee9b6/51a2131e93ab448294fac5e2b0beffd5 [2021-12-15 10:08:28,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:08:28,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:08:28,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:08:28,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:08:28,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:08:28,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:28" (1/1) ... [2021-12-15 10:08:28,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9d045b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:28, skipping insertion in model container [2021-12-15 10:08:28,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:28" (1/1) ... [2021-12-15 10:08:28,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:08:28,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:08:28,821 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/Problem19_label37.c[5183,5196] [2021-12-15 10:08:29,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:08:29,945 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:08:29,975 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/Problem19_label37.c[5183,5196] [2021-12-15 10:08:30,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:08:30,494 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:08:30,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30 WrapperNode [2021-12-15 10:08:30,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:08:30,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:08:30,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:08:30,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:08:30,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:30,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:31,262 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 10:08:31,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:08:31,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:08:31,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:08:31,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:08:31,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:31,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:31,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:31,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:31,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:32,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:32,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:32,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:08:32,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:08:32,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:08:32,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:08:32,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (1/1) ... [2021-12-15 10:08:32,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:08:32,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:08:32,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:08:32,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:08:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:08:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:08:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:08:32,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:08:32,400 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:08:32,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:08:37,915 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:08:37,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:08:37,927 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:08:37,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:37 BoogieIcfgContainer [2021-12-15 10:08:37,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:08:37,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:08:37,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:08:37,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:08:37,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:08:28" (1/3) ... [2021-12-15 10:08:37,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3040e508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:37, skipping insertion in model container [2021-12-15 10:08:37,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:30" (2/3) ... [2021-12-15 10:08:37,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3040e508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:37, skipping insertion in model container [2021-12-15 10:08:37,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:37" (3/3) ... [2021-12-15 10:08:37,936 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label37.c [2021-12-15 10:08:37,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:08:37,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:08:37,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:08:38,003 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:08:38,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:08:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 10:08:38,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:08:38,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:08:38,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:08:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:08:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2021-12-15 10:08:38,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:08:38,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830686393] [2021-12-15 10:08:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:08:38,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:08:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:08:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:08:38,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:08:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830686393] [2021-12-15 10:08:38,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830686393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:08:38,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:08:38,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:08:38,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677824825] [2021-12-15 10:08:38,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:08:38,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:08:38,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:08:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:08:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:08:38,282 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:08:45,137 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-15 10:08:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:08:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2021-12-15 10:08:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:08:45,171 INFO L225 Difference]: With dead ends: 4957 [2021-12-15 10:08:45,171 INFO L226 Difference]: Without dead ends: 3129 [2021-12-15 10:08:45,179 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 10:08:45,182 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1588 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:08:45,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-15 10:08:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-15 10:08:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-15 10:08:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-15 10:08:45,289 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 38 [2021-12-15 10:08:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:08:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-15 10:08:45,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-15 10:08:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 10:08:45,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:08:45,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:45,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:08:45,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:08:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:08:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash -936904592, now seen corresponding path program 1 times [2021-12-15 10:08:45,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:08:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106949728] [2021-12-15 10:08:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:08:45,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:08:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:08:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:08:45,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:08:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106949728] [2021-12-15 10:08:45,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106949728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:08:45,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:08:45,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:08:45,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338258289] [2021-12-15 10:08:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:08:45,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:08:45,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:08:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:08:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:08:45,428 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:08:50,901 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-15 10:08:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:08:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 105 [2021-12-15 10:08:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:08:50,932 INFO L225 Difference]: With dead ends: 9153 [2021-12-15 10:08:50,932 INFO L226 Difference]: Without dead ends: 6047 [2021-12-15 10:08:50,941 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 10:08:50,942 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:08:50,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 10:08:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-15 10:08:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-15 10:08:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-15 10:08:51,043 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 105 [2021-12-15 10:08:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:08:51,044 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-15 10:08:51,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-15 10:08:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 10:08:51,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:08:51,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:51,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:08:51,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:08:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:08:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash 149706948, now seen corresponding path program 1 times [2021-12-15 10:08:51,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:08:51,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294605905] [2021-12-15 10:08:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:08:51,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:08:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:08:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:08:51,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:08:51,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294605905] [2021-12-15 10:08:51,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294605905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:08:51,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:08:51,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:08:51,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556554714] [2021-12-15 10:08:51,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:08:51,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:08:51,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:08:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:08:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:08:51,145 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:08:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:08:59,818 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-15 10:08:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:08:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 10:08:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:08:59,851 INFO L225 Difference]: With dead ends: 19026 [2021-12-15 10:08:59,851 INFO L226 Difference]: Without dead ends: 12997 [2021-12-15 10:08:59,860 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 10:08:59,861 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4260 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 10840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:08:59,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 1207 Invalid, 10840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-12-15 10:08:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-15 10:09:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-15 10:09:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.346243222308288) internal successors, (17380), 12910 states have internal predecessors, (17380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2021-12-15 10:09:00,129 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 107 [2021-12-15 10:09:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:00,129 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2021-12-15 10:09:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2021-12-15 10:09:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-15 10:09:00,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:00,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 10:09:00,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:09:00,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 670406475, now seen corresponding path program 1 times [2021-12-15 10:09:00,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095055171] [2021-12-15 10:09:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:00,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 10:09:00,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:00,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095055171] [2021-12-15 10:09:00,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095055171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:00,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:00,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:00,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046393969] [2021-12-15 10:09:00,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:00,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:09:00,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:09:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:09:00,423 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:05,642 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2021-12-15 10:09:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:09:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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 342 [2021-12-15 10:09:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:05,676 INFO L225 Difference]: With dead ends: 24486 [2021-12-15 10:09:05,677 INFO L226 Difference]: Without dead ends: 12911 [2021-12-15 10:09:05,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:09:05,692 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:05,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-15 10:09:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-15 10:09:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-15 10:09:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3455460883036405) internal successors, (17371), 12910 states have internal predecessors, (17371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2021-12-15 10:09:05,944 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 342 [2021-12-15 10:09:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:05,945 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2021-12-15 10:09:05,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2021-12-15 10:09:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-15 10:09:05,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:05,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:05,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:09:05,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash -235004884, now seen corresponding path program 1 times [2021-12-15 10:09:05,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:05,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854672751] [2021-12-15 10:09:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:05,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:06,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854672751] [2021-12-15 10:09:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854672751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:09:06,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282002130] [2021-12-15 10:09:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:06,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:09:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:06,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:09:06,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:09:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:09:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:09:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:07,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:09:07,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282002130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:07,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:09:07,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 10:09:07,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12336629] [2021-12-15 10:09:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:07,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:09:07,172 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:13,260 INFO L93 Difference]: Finished difference Result 30050 states and 41077 transitions. [2021-12-15 10:09:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 516 [2021-12-15 10:09:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:13,291 INFO L225 Difference]: With dead ends: 30050 [2021-12-15 10:09:13,292 INFO L226 Difference]: Without dead ends: 18506 [2021-12-15 10:09:13,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 515 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 10:09:13,305 INFO L933 BasicCegarLoop]: 3047 mSDtfsCounter, 1446 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4993 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 3222 SdHoareTripleChecker+Invalid, 5919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 4993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:13,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 3222 Invalid, 5919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 4993 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-15 10:09:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18506 states. [2021-12-15 10:09:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18506 to 18422. [2021-12-15 10:09:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18422 states, 18421 states have (on average 1.2895065414472613) internal successors, (23754), 18421 states have internal predecessors, (23754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18422 states to 18422 states and 23754 transitions. [2021-12-15 10:09:13,525 INFO L78 Accepts]: Start accepts. Automaton has 18422 states and 23754 transitions. Word has length 516 [2021-12-15 10:09:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:13,530 INFO L470 AbstractCegarLoop]: Abstraction has 18422 states and 23754 transitions. [2021-12-15 10:09:13,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18422 states and 23754 transitions. [2021-12-15 10:09:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2021-12-15 10:09:13,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:13,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:13,558 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 10:09:13,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:09:13,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 954577436, now seen corresponding path program 1 times [2021-12-15 10:09:13,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:13,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567606139] [2021-12-15 10:09:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:13,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:14,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567606139] [2021-12-15 10:09:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567606139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:09:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594183243] [2021-12-15 10:09:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:14,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:09:14,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:14,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:09:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:09:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:09:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:09:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-15 10:09:15,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:09:15,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594183243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:15,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:09:15,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 10:09:15,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400956581] [2021-12-15 10:09:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:15,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:15,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:09:15,008 INFO L87 Difference]: Start difference. First operand 18422 states and 23754 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:20,977 INFO L93 Difference]: Finished difference Result 51887 states and 67642 transitions. [2021-12-15 10:09:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 525 [2021-12-15 10:09:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:21,036 INFO L225 Difference]: With dead ends: 51887 [2021-12-15 10:09:21,036 INFO L226 Difference]: Without dead ends: 34832 [2021-12-15 10:09:21,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 524 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 10:09:21,059 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 1007 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 5914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:21,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1772 Invalid, 5914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 4887 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 10:09:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34832 states. [2021-12-15 10:09:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34832 to 34828. [2021-12-15 10:09:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34828 states, 34827 states have (on average 1.2198007293192064) internal successors, (42482), 34827 states have internal predecessors, (42482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34828 states to 34828 states and 42482 transitions. [2021-12-15 10:09:21,457 INFO L78 Accepts]: Start accepts. Automaton has 34828 states and 42482 transitions. Word has length 525 [2021-12-15 10:09:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:21,458 INFO L470 AbstractCegarLoop]: Abstraction has 34828 states and 42482 transitions. [2021-12-15 10:09:21,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 34828 states and 42482 transitions. [2021-12-15 10:09:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-12-15 10:09:21,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:21,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:21,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:09:21,681 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,SelfDestructingSolverStorable5 [2021-12-15 10:09:21,682 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1928875344, now seen corresponding path program 1 times [2021-12-15 10:09:21,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:21,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503390628] [2021-12-15 10:09:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:21,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:21,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:21,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503390628] [2021-12-15 10:09:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503390628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:09:21,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479790819] [2021-12-15 10:09:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:21,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:09:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:21,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:09:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:09:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:22,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:09:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:09:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:22,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:09:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479790819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:22,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:09:22,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 10:09:22,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262609101] [2021-12-15 10:09:22,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:22,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:22,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:09:22,688 INFO L87 Difference]: Start difference. First operand 34828 states and 42482 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:28,492 INFO L93 Difference]: Finished difference Result 101045 states and 123772 transitions. [2021-12-15 10:09:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 594 [2021-12-15 10:09:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted.