./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.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 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:49:35,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:49:35,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:49:35,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:49:35,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:49:35,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:49:35,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:49:35,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:49:35,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:49:35,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:49:35,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:49:35,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:49:35,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:49:35,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:49:35,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:49:35,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:49:35,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:49:35,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:49:35,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:49:35,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:49:35,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:49:35,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:49:35,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:49:35,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:49:35,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:49:35,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:49:35,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:49:35,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:49:35,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:49:35,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:49:35,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:49:35,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:49:35,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:49:35,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:49:35,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:49:35,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:49:35,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:49:35,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:49:35,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:49:35,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:49:35,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:49:35,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:49:35,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:49:35,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:49:35,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:49:35,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:49:35,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:49:35,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:49:35,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:49:35,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:49:35,442 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:49:35,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:49:35,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:49:35,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:49:35,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:49:35,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:49:35,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:35,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:49:35,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:49:35,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:49:35,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:49:35,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:49:35,446 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:49:35,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:49:35,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:49:35,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:49:35,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 [2021-12-22 11:49:35,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:49:35,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:49:35,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:49:35,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:49:35,683 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:49:35,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:35,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a26c574/cad763fcaa6643dd87c8b915a86a1f45/FLAGadb7bab6a [2021-12-22 11:49:36,086 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:49:36,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:36,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a26c574/cad763fcaa6643dd87c8b915a86a1f45/FLAGadb7bab6a [2021-12-22 11:49:36,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a26c574/cad763fcaa6643dd87c8b915a86a1f45 [2021-12-22 11:49:36,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:49:36,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:49:36,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:36,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:49:36,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:49:36,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:36,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488005b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36, skipping insertion in model container [2021-12-22 11:49:36,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:36,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:49:36,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:49:36,871 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/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2021-12-22 11:49:36,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:36,884 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:49:36,922 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/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2021-12-22 11:49:36,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:36,938 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:49:36,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36 WrapperNode [2021-12-22 11:49:36,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:36,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:36,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:49:36,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:49:36,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:36,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:36,985 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 246 [2021-12-22 11:49:36,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:36,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:49:36,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:49:36,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:49:36,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:36,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:49:37,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:49:37,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:49:37,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:49:37,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (1/1) ... [2021-12-22 11:49:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:37,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:49:37,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:49:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:49:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:49:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:49:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:49:37,160 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:49:37,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:49:37,398 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:49:37,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:49:37,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:49:37,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:37 BoogieIcfgContainer [2021-12-22 11:49:37,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:49:37,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:49:37,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:49:37,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:49:37,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:49:36" (1/3) ... [2021-12-22 11:49:37,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615477ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:37, skipping insertion in model container [2021-12-22 11:49:37,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:36" (2/3) ... [2021-12-22 11:49:37,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615477ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:37, skipping insertion in model container [2021-12-22 11:49:37,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:37" (3/3) ... [2021-12-22 11:49:37,411 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:37,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:49:37,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:49:37,445 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:49:37,450 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:49:37,450 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:49:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 11:49:37,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:37,468 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] [2021-12-22 11:49:37,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -430581620, now seen corresponding path program 1 times [2021-12-22 11:49:37,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:37,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833619638] [2021-12-22 11:49:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:37,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:37,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833619638] [2021-12-22 11:49:37,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833619638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:37,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:37,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117782994] [2021-12-22 11:49:37,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:37,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:37,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:37,648 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:37,698 INFO L93 Difference]: Finished difference Result 133 states and 215 transitions. [2021-12-22 11:49:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-12-22 11:49:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:37,705 INFO L225 Difference]: With dead ends: 133 [2021-12-22 11:49:37,706 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 11:49:37,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:37,710 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:37,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 452 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 11:49:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-22 11:49:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 103 transitions. [2021-12-22 11:49:37,739 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 103 transitions. Word has length 25 [2021-12-22 11:49:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:37,739 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 103 transitions. [2021-12-22 11:49:37,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 103 transitions. [2021-12-22 11:49:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 11:49:37,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:37,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:37,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:49:37,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash -482254910, now seen corresponding path program 1 times [2021-12-22 11:49:37,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:37,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333194015] [2021-12-22 11:49:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:37,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:37,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333194015] [2021-12-22 11:49:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333194015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:37,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:37,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:37,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840725355] [2021-12-22 11:49:37,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:37,850 INFO L87 Difference]: Start difference. First operand 74 states and 103 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:37,881 INFO L93 Difference]: Finished difference Result 164 states and 243 transitions. [2021-12-22 11:49:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-12-22 11:49:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:37,884 INFO L225 Difference]: With dead ends: 164 [2021-12-22 11:49:37,885 INFO L226 Difference]: Without dead ends: 113 [2021-12-22 11:49:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:37,887 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:37,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-22 11:49:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-12-22 11:49:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4636363636363636) internal successors, (161), 110 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2021-12-22 11:49:37,901 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 41 [2021-12-22 11:49:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:37,902 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-12-22 11:49:37,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2021-12-22 11:49:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 11:49:37,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:37,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:37,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:49:37,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2033327635, now seen corresponding path program 1 times [2021-12-22 11:49:37,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373658449] [2021-12-22 11:49:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:37,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:37,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373658449] [2021-12-22 11:49:37,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373658449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:37,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486462312] [2021-12-22 11:49:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:37,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:37,981 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:37,996 INFO L93 Difference]: Finished difference Result 263 states and 397 transitions. [2021-12-22 11:49:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-22 11:49:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:37,997 INFO L225 Difference]: With dead ends: 263 [2021-12-22 11:49:37,998 INFO L226 Difference]: Without dead ends: 175 [2021-12-22 11:49:37,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:37,999 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 59 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:37,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 204 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-22 11:49:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2021-12-22 11:49:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4883720930232558) internal successors, (256), 172 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 256 transitions. [2021-12-22 11:49:38,011 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 256 transitions. Word has length 42 [2021-12-22 11:49:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:38,011 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 256 transitions. [2021-12-22 11:49:38,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 256 transitions. [2021-12-22 11:49:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 11:49:38,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:38,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:38,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:49:38,013 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1819327886, now seen corresponding path program 1 times [2021-12-22 11:49:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699180662] [2021-12-22 11:49:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:38,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699180662] [2021-12-22 11:49:38,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699180662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:38,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:38,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:38,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487759406] [2021-12-22 11:49:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:38,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:38,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:38,074 INFO L87 Difference]: Start difference. First operand 173 states and 256 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:38,156 INFO L93 Difference]: Finished difference Result 773 states and 1188 transitions. [2021-12-22 11:49:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:38,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 11:49:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:38,160 INFO L225 Difference]: With dead ends: 773 [2021-12-22 11:49:38,160 INFO L226 Difference]: Without dead ends: 623 [2021-12-22 11:49:38,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:38,162 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 403 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:38,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 532 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-12-22 11:49:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 321. [2021-12-22 11:49:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.5) internal successors, (480), 320 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 480 transitions. [2021-12-22 11:49:38,184 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 480 transitions. Word has length 43 [2021-12-22 11:49:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:38,185 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 480 transitions. [2021-12-22 11:49:38,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 480 transitions. [2021-12-22 11:49:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 11:49:38,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:38,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:38,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:49:38,186 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -947913043, now seen corresponding path program 1 times [2021-12-22 11:49:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:38,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101482644] [2021-12-22 11:49:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:38,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:38,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101482644] [2021-12-22 11:49:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101482644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:38,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720452097] [2021-12-22 11:49:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:38,243 INFO L87 Difference]: Start difference. First operand 321 states and 480 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:38,308 INFO L93 Difference]: Finished difference Result 1143 states and 1727 transitions. [2021-12-22 11:49:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 11:49:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:38,312 INFO L225 Difference]: With dead ends: 1143 [2021-12-22 11:49:38,312 INFO L226 Difference]: Without dead ends: 845 [2021-12-22 11:49:38,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:38,314 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 239 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 346 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-22 11:49:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 841. [2021-12-22 11:49:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5) internal successors, (1260), 840 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1260 transitions. [2021-12-22 11:49:38,371 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1260 transitions. Word has length 44 [2021-12-22 11:49:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1260 transitions. [2021-12-22 11:49:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1260 transitions. [2021-12-22 11:49:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 11:49:38,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:38,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:38,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:49:38,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1382364025, now seen corresponding path program 1 times [2021-12-22 11:49:38,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387044574] [2021-12-22 11:49:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:38,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:38,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387044574] [2021-12-22 11:49:38,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387044574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:38,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:38,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:49:38,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495739367] [2021-12-22 11:49:38,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:38,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:49:38,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:49:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:49:38,450 INFO L87 Difference]: Start difference. First operand 841 states and 1260 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:38,599 INFO L93 Difference]: Finished difference Result 1755 states and 2593 transitions. [2021-12-22 11:49:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:49:38,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 11:49:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:38,605 INFO L225 Difference]: With dead ends: 1755 [2021-12-22 11:49:38,605 INFO L226 Difference]: Without dead ends: 1753 [2021-12-22 11:49:38,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:49:38,607 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 540 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:38,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 501 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-12-22 11:49:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 913. [2021-12-22 11:49:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4605263157894737) internal successors, (1332), 912 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1332 transitions. [2021-12-22 11:49:38,672 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1332 transitions. Word has length 45 [2021-12-22 11:49:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:38,672 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1332 transitions. [2021-12-22 11:49:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1332 transitions. [2021-12-22 11:49:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 11:49:38,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:38,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:38,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:49:38,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash 148966672, now seen corresponding path program 1 times [2021-12-22 11:49:38,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567361975] [2021-12-22 11:49:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:38,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:38,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:38,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567361975] [2021-12-22 11:49:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567361975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:38,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387228414] [2021-12-22 11:49:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:38,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:38,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:38,704 INFO L87 Difference]: Start difference. First operand 913 states and 1332 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:38,791 INFO L93 Difference]: Finished difference Result 2393 states and 3478 transitions. [2021-12-22 11:49:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2021-12-22 11:49:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:38,796 INFO L225 Difference]: With dead ends: 2393 [2021-12-22 11:49:38,796 INFO L226 Difference]: Without dead ends: 1503 [2021-12-22 11:49:38,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:38,798 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:38,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 178 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-12-22 11:49:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1481. [2021-12-22 11:49:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.4243243243243244) internal successors, (2108), 1480 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2108 transitions. [2021-12-22 11:49:38,881 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2108 transitions. Word has length 46 [2021-12-22 11:49:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:38,882 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 2108 transitions. [2021-12-22 11:49:38,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2108 transitions. [2021-12-22 11:49:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 11:49:38,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:38,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:49:38,883 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1623386325, now seen corresponding path program 1 times [2021-12-22 11:49:38,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:38,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607078086] [2021-12-22 11:49:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:38,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:38,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:38,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607078086] [2021-12-22 11:49:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607078086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:38,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047035647] [2021-12-22 11:49:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:38,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:38,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:38,909 INFO L87 Difference]: Start difference. First operand 1481 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:39,035 INFO L93 Difference]: Finished difference Result 3000 states and 4298 transitions. [2021-12-22 11:49:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-12-22 11:49:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:39,042 INFO L225 Difference]: With dead ends: 3000 [2021-12-22 11:49:39,043 INFO L226 Difference]: Without dead ends: 2109 [2021-12-22 11:49:39,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:39,045 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 65 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-22 11:49:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2107. [2021-12-22 11:49:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4064577397910731) internal successors, (2962), 2106 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2962 transitions. [2021-12-22 11:49:39,177 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2962 transitions. Word has length 47 [2021-12-22 11:49:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 2962 transitions. [2021-12-22 11:49:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2962 transitions. [2021-12-22 11:49:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:49:39,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:39,181 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:39,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:49:39,183 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 876819086, now seen corresponding path program 1 times [2021-12-22 11:49:39,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:39,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670898168] [2021-12-22 11:49:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:39,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:49:39,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:39,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670898168] [2021-12-22 11:49:39,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670898168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:39,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:39,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:39,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151478460] [2021-12-22 11:49:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:39,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:39,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:39,259 INFO L87 Difference]: Start difference. First operand 2107 states and 2962 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:39,425 INFO L93 Difference]: Finished difference Result 3749 states and 5326 transitions. [2021-12-22 11:49:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 11:49:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:39,433 INFO L225 Difference]: With dead ends: 3749 [2021-12-22 11:49:39,433 INFO L226 Difference]: Without dead ends: 2991 [2021-12-22 11:49:39,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:39,436 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 279 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:39,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 462 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-12-22 11:49:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2721. [2021-12-22 11:49:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 1.4073529411764707) internal successors, (3828), 2720 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3828 transitions. [2021-12-22 11:49:39,591 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3828 transitions. Word has length 66 [2021-12-22 11:49:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:39,592 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3828 transitions. [2021-12-22 11:49:39,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3828 transitions. [2021-12-22 11:49:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:49:39,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:39,594 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:39,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:49:39,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1304165150, now seen corresponding path program 1 times [2021-12-22 11:49:39,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:39,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140448532] [2021-12-22 11:49:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:39,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:39,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:39,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140448532] [2021-12-22 11:49:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140448532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:39,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:39,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:39,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819516659] [2021-12-22 11:49:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:39,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:39,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:39,651 INFO L87 Difference]: Start difference. First operand 2721 states and 3828 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:39,795 INFO L93 Difference]: Finished difference Result 4469 states and 6263 transitions. [2021-12-22 11:49:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-22 11:49:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:39,804 INFO L225 Difference]: With dead ends: 4469 [2021-12-22 11:49:39,805 INFO L226 Difference]: Without dead ends: 2909 [2021-12-22 11:49:39,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:39,810 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:39,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 219 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-12-22 11:49:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2772. [2021-12-22 11:49:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2771 states have (on average 1.3789245759653554) internal successors, (3821), 2771 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3821 transitions. [2021-12-22 11:49:39,950 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3821 transitions. Word has length 66 [2021-12-22 11:49:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:39,951 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 3821 transitions. [2021-12-22 11:49:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3821 transitions. [2021-12-22 11:49:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:49:39,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:39,952 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:39,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:49:39,953 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1558535868, now seen corresponding path program 1 times [2021-12-22 11:49:39,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001540899] [2021-12-22 11:49:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:39,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:49:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001540899] [2021-12-22 11:49:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001540899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:40,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531611272] [2021-12-22 11:49:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:40,032 INFO L87 Difference]: Start difference. First operand 2772 states and 3821 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:40,205 INFO L93 Difference]: Finished difference Result 3833 states and 5332 transitions. [2021-12-22 11:49:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 66 [2021-12-22 11:49:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:40,214 INFO L225 Difference]: With dead ends: 3833 [2021-12-22 11:49:40,214 INFO L226 Difference]: Without dead ends: 3441 [2021-12-22 11:49:40,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:40,216 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 285 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:40,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 439 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-12-22 11:49:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3150. [2021-12-22 11:49:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 1.3817084788821847) internal successors, (4351), 3149 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4351 transitions. [2021-12-22 11:49:40,377 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4351 transitions. Word has length 66 [2021-12-22 11:49:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 3150 states and 4351 transitions. [2021-12-22 11:49:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4351 transitions. [2021-12-22 11:49:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:49:40,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:40,380 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:49:40,380 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -333777212, now seen corresponding path program 1 times [2021-12-22 11:49:40,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589576940] [2021-12-22 11:49:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:40,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:40,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589576940] [2021-12-22 11:49:40,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589576940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:49:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926842356] [2021-12-22 11:49:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:40,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:49:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:40,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:49:40,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:49:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:49:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:49:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:40,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:49:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:41,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926842356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:49:41,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:49:41,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-22 11:49:41,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368862670] [2021-12-22 11:49:41,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:49:41,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 11:49:41,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 11:49:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:49:41,032 INFO L87 Difference]: Start difference. First operand 3150 states and 4351 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:44,642 INFO L93 Difference]: Finished difference Result 31671 states and 43517 transitions. [2021-12-22 11:49:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-22 11:49:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 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 67 [2021-12-22 11:49:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:44,713 INFO L225 Difference]: With dead ends: 31671 [2021-12-22 11:49:44,713 INFO L226 Difference]: Without dead ends: 28554 [2021-12-22 11:49:44,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1251, Invalid=5069, Unknown=0, NotChecked=0, Total=6320 [2021-12-22 11:49:44,726 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 2704 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:44,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 1837 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 11:49:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28554 states. [2021-12-22 11:49:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28554 to 16941. [2021-12-22 11:49:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16941 states, 16940 states have (on average 1.3589728453364818) internal successors, (23021), 16940 states have internal predecessors, (23021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16941 states to 16941 states and 23021 transitions. [2021-12-22 11:49:45,792 INFO L78 Accepts]: Start accepts. Automaton has 16941 states and 23021 transitions. Word has length 67 [2021-12-22 11:49:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:45,793 INFO L470 AbstractCegarLoop]: Abstraction has 16941 states and 23021 transitions. [2021-12-22 11:49:45,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16941 states and 23021 transitions. [2021-12-22 11:49:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:45,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:45,799 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:45,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 11:49:46,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 11:49:46,016 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1942679399, now seen corresponding path program 1 times [2021-12-22 11:49:46,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:46,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641755637] [2021-12-22 11:49:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:46,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:46,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641755637] [2021-12-22 11:49:46,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641755637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:46,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:46,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:46,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131264861] [2021-12-22 11:49:46,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:46,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:46,055 INFO L87 Difference]: Start difference. First operand 16941 states and 23021 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:47,388 INFO L93 Difference]: Finished difference Result 43849 states and 59351 transitions. [2021-12-22 11:49:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-12-22 11:49:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:47,580 INFO L225 Difference]: With dead ends: 43849 [2021-12-22 11:49:47,581 INFO L226 Difference]: Without dead ends: 29850 [2021-12-22 11:49:47,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:47,599 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:47,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 203 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29850 states. [2021-12-22 11:49:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29850 to 29810. [2021-12-22 11:49:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29810 states, 29809 states have (on average 1.3364084672414371) internal successors, (39837), 29809 states have internal predecessors, (39837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29810 states to 29810 states and 39837 transitions. [2021-12-22 11:49:49,401 INFO L78 Accepts]: Start accepts. Automaton has 29810 states and 39837 transitions. Word has length 68 [2021-12-22 11:49:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:49,401 INFO L470 AbstractCegarLoop]: Abstraction has 29810 states and 39837 transitions. [2021-12-22 11:49:49,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 29810 states and 39837 transitions. [2021-12-22 11:49:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:49:49,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:49,405 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:49,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:49:49,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash 13414152, now seen corresponding path program 1 times [2021-12-22 11:49:49,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912894411] [2021-12-22 11:49:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:49,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:49,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:49,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912894411] [2021-12-22 11:49:49,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912894411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:49,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:49,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:49,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906252803] [2021-12-22 11:49:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:49,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:49,441 INFO L87 Difference]: Start difference. First operand 29810 states and 39837 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:51,048 INFO L93 Difference]: Finished difference Result 46563 states and 62680 transitions. [2021-12-22 11:49:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 69 [2021-12-22 11:49:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:51,193 INFO L225 Difference]: With dead ends: 46563 [2021-12-22 11:49:51,194 INFO L226 Difference]: Without dead ends: 39211 [2021-12-22 11:49:51,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:51,207 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 271 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:51,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 489 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39211 states. [2021-12-22 11:49:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39211 to 35828. [2021-12-22 11:49:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35828 states, 35827 states have (on average 1.3327378792530773) internal successors, (47748), 35827 states have internal predecessors, (47748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35828 states to 35828 states and 47748 transitions. [2021-12-22 11:49:53,295 INFO L78 Accepts]: Start accepts. Automaton has 35828 states and 47748 transitions. Word has length 69 [2021-12-22 11:49:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 35828 states and 47748 transitions. [2021-12-22 11:49:53,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35828 states and 47748 transitions. [2021-12-22 11:49:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:49:53,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,304 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:53,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:49:53,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1336169493, now seen corresponding path program 1 times [2021-12-22 11:49:53,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721053824] [2021-12-22 11:49:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:53,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721053824] [2021-12-22 11:49:53,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721053824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008544103] [2021-12-22 11:49:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,333 INFO L87 Difference]: Start difference. First operand 35828 states and 47748 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:55,894 INFO L93 Difference]: Finished difference Result 84541 states and 112161 transitions. [2021-12-22 11:49:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-12-22 11:49:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:55,974 INFO L225 Difference]: With dead ends: 84541 [2021-12-22 11:49:55,975 INFO L226 Difference]: Without dead ends: 50714 [2021-12-22 11:49:56,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:56,007 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 238 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2021-12-22 11:49:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 41050. [2021-12-22 11:49:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41050 states, 41049 states have (on average 1.3163779872834904) internal successors, (54036), 41049 states have internal predecessors, (54036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41050 states to 41050 states and 54036 transitions. [2021-12-22 11:49:58,164 INFO L78 Accepts]: Start accepts. Automaton has 41050 states and 54036 transitions. Word has length 69 [2021-12-22 11:49:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:58,164 INFO L470 AbstractCegarLoop]: Abstraction has 41050 states and 54036 transitions. [2021-12-22 11:49:58,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41050 states and 54036 transitions. [2021-12-22 11:49:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:49:58,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:58,169 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:58,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:49:58,169 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash 896200571, now seen corresponding path program 1 times [2021-12-22 11:49:58,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:58,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115226589] [2021-12-22 11:49:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:58,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:58,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115226589] [2021-12-22 11:49:58,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115226589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:49:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635213593] [2021-12-22 11:49:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:58,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:49:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:58,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:49:58,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:49:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 11:49:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:49:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:49:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635213593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:49:58,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:49:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-22 11:49:58,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144850165] [2021-12-22 11:49:58,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:49:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 11:49:58,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 11:49:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:49:58,658 INFO L87 Difference]: Start difference. First operand 41050 states and 54036 transitions. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:03,229 INFO L93 Difference]: Finished difference Result 95842 states and 126171 transitions. [2021-12-22 11:50:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 11:50:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 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 70 [2021-12-22 11:50:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:03,323 INFO L225 Difference]: With dead ends: 95842 [2021-12-22 11:50:03,323 INFO L226 Difference]: Without dead ends: 70591 [2021-12-22 11:50:03,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:50:03,348 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1552 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:03,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 427 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:50:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70591 states. [2021-12-22 11:50:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70591 to 41740. [2021-12-22 11:50:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41740 states, 41739 states have (on average 1.3282781092024245) internal successors, (55441), 41739 states have internal predecessors, (55441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41740 states to 41740 states and 55441 transitions. [2021-12-22 11:50:06,175 INFO L78 Accepts]: Start accepts. Automaton has 41740 states and 55441 transitions. Word has length 70 [2021-12-22 11:50:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:06,175 INFO L470 AbstractCegarLoop]: Abstraction has 41740 states and 55441 transitions. [2021-12-22 11:50:06,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41740 states and 55441 transitions. [2021-12-22 11:50:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:50:06,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:06,180 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:50:06,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:50:06,404 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,SelfDestructingSolverStorable15 [2021-12-22 11:50:06,404 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:06,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1077094294, now seen corresponding path program 1 times [2021-12-22 11:50:06,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:06,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351698025] [2021-12-22 11:50:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:06,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:06,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351698025] [2021-12-22 11:50:06,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351698025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:06,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:06,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:06,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499736173] [2021-12-22 11:50:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:06,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:06,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:06,428 INFO L87 Difference]: Start difference. First operand 41740 states and 55441 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:08,028 INFO L93 Difference]: Finished difference Result 46531 states and 61426 transitions. [2021-12-22 11:50:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-12-22 11:50:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:08,075 INFO L225 Difference]: With dead ends: 46531 [2021-12-22 11:50:08,075 INFO L226 Difference]: Without dead ends: 28649 [2021-12-22 11:50:08,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:08,087 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 53 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:08,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 252 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28649 states. [2021-12-22 11:50:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28649 to 28631. [2021-12-22 11:50:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28631 states, 28630 states have (on average 1.3024799161718477) internal successors, (37290), 28630 states have internal predecessors, (37290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28631 states to 28631 states and 37290 transitions. [2021-12-22 11:50:09,958 INFO L78 Accepts]: Start accepts. Automaton has 28631 states and 37290 transitions. Word has length 72 [2021-12-22 11:50:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:09,958 INFO L470 AbstractCegarLoop]: Abstraction has 28631 states and 37290 transitions. [2021-12-22 11:50:09,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 28631 states and 37290 transitions. [2021-12-22 11:50:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 11:50:09,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:09,963 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:50:09,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:50:09,963 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 133357367, now seen corresponding path program 1 times [2021-12-22 11:50:09,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:09,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765574353] [2021-12-22 11:50:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:09,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:50:10,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765574353] [2021-12-22 11:50:10,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765574353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:10,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:10,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:10,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463747226] [2021-12-22 11:50:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:10,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:50:10,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:50:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:10,101 INFO L87 Difference]: Start difference. First operand 28631 states and 37290 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:12,245 INFO L93 Difference]: Finished difference Result 61516 states and 79862 transitions. [2021-12-22 11:50:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:50:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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 [2021-12-22 11:50:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:12,293 INFO L225 Difference]: With dead ends: 61516 [2021-12-22 11:50:12,294 INFO L226 Difference]: Without dead ends: 32935 [2021-12-22 11:50:12,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:50:12,313 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 440 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:12,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 205 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:50:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32935 states.