./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.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.4.ufo.BOUNDED-8.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 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:49:51,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:49:51,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:49:51,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:49:51,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:49:51,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:49:51,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:49:51,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:49:51,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:49:51,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:49:51,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:49:51,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:49:51,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:49:51,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:49:51,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:49:51,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:49:51,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:49:51,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:49:51,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:49:51,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:49:51,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:49:51,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:49:51,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:49:51,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:49:51,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:49:51,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:49:51,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:49:51,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:49:51,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:49:51,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:49:51,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:49:51,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:49:51,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:49:51,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:49:51,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:49:51,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:49:51,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:49:51,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:49:51,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:49:51,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:49:51,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:49:51,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:49:51,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:49:51,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:49:51,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:49:51,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:49:51,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:49:51,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:49:51,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:49:51,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:49:51,397 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:49:51,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:49:51,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:49:51,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:49:51,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:49:51,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:49:51,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:49:51,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:49:51,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:49:51,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:49:51,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:51,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:49:51,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:49:51,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:49:51,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:49:51,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:49:51,402 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:49:51,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:49:51,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:49:51,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:49:51,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d [2021-12-22 11:49:51,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:49:51,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:49:51,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:49:51,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:49:51,622 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:49:51,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-22 11:49:51,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf857b0d/2d09462f8a9f4b6ab4b1806c4b697554/FLAG4e3807251 [2021-12-22 11:49:52,067 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:49:52,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-22 11:49:52,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf857b0d/2d09462f8a9f4b6ab4b1806c4b697554/FLAG4e3807251 [2021-12-22 11:49:52,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf857b0d/2d09462f8a9f4b6ab4b1806c4b697554 [2021-12-22 11:49:52,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:49:52,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:49:52,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:52,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:49:52,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:49:52,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102a399d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52, skipping insertion in model container [2021-12-22 11:49:52,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:49:52,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:49:52,277 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.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-22 11:49:52,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:52,285 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:49:52,325 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.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-22 11:49:52,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:52,336 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:49:52,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52 WrapperNode [2021-12-22 11:49:52,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:52,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:52,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:49:52,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:49:52,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,371 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 319 [2021-12-22 11:49:52,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:52,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:49:52,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:49:52,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:49:52,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:49:52,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:49:52,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:49:52,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:49:52,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (1/1) ... [2021-12-22 11:49:52,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:52,431 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 11:49:52,433 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 11:49:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:49:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:49:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:49:52,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:49:52,560 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:49:52,569 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:49:53,003 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:49:53,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:49:53,013 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:49:53,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:53 BoogieIcfgContainer [2021-12-22 11:49:53,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:49:53,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:49:53,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:49:53,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:49:53,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:49:52" (1/3) ... [2021-12-22 11:49:53,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28574c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:53, skipping insertion in model container [2021-12-22 11:49:53,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:52" (2/3) ... [2021-12-22 11:49:53,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28574c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:53, skipping insertion in model container [2021-12-22 11:49:53,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:53" (3/3) ... [2021-12-22 11:49:53,036 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-22 11:49:53,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:49:53,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:49:53,107 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:49:53,114 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 11:49:53,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:49:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 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 11:49:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 11:49:53,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,148 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] [2021-12-22 11:49:53,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2021-12-22 11:49:53,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406880864] [2021-12-22 11:49:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,329 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 11:49:53,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406880864] [2021-12-22 11:49:53,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406880864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:49:53,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27262202] [2021-12-22 11:49:53,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:49:53,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:49:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:49:53,366 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:49:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:53,403 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2021-12-22 11:49:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:49:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 11:49:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:53,412 INFO L225 Difference]: With dead ends: 171 [2021-12-22 11:49:53,413 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 11:49:53,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:49:53,417 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:53,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 11:49:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-22 11:49:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-12-22 11:49:53,443 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2021-12-22 11:49:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-12-22 11:49:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:49:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-12-22 11:49:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 11:49:53,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,445 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] [2021-12-22 11:49:53,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:49:53,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2021-12-22 11:49:53,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373481555] [2021-12-22 11:49:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,512 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 11:49:53,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373481555] [2021-12-22 11:49:53,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373481555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:53,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540602564] [2021-12-22 11:49:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:53,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:53,515 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:49:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:53,595 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2021-12-22 11:49:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:49:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 11:49:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:53,597 INFO L225 Difference]: With dead ends: 232 [2021-12-22 11:49:53,597 INFO L226 Difference]: Without dead ends: 162 [2021-12-22 11:49:53,598 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 11:49:53,599 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:53,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 591 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-22 11:49:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-12-22 11:49:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 0 states have call successors, (0), 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 11:49:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-12-22 11:49:53,606 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2021-12-22 11:49:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,606 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-12-22 11:49:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:49:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-12-22 11:49:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 11:49:53,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,608 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, 1, 1, 1, 1, 1] [2021-12-22 11:49:53,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:49:53,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2021-12-22 11:49:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032206566] [2021-12-22 11:49:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,664 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 11:49:53,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032206566] [2021-12-22 11:49:53,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032206566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080103348] [2021-12-22 11:49:53,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,666 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 11:49:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:53,680 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2021-12-22 11:49:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-22 11:49:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:53,681 INFO L225 Difference]: With dead ends: 216 [2021-12-22 11:49:53,682 INFO L226 Difference]: Without dead ends: 150 [2021-12-22 11:49:53,682 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 11:49:53,683 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 312 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 11:49:53,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-22 11:49:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-22 11:49:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.4829931972789117) internal successors, (218), 147 states have internal predecessors, (218), 0 states have call successors, (0), 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 11:49:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2021-12-22 11:49:53,692 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2021-12-22 11:49:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,692 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2021-12-22 11:49:53,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 11:49:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2021-12-22 11:49:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:49:53,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,694 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, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:53,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:49:53,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2021-12-22 11:49:53,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9152034] [2021-12-22 11:49:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,741 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 11:49:53,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9152034] [2021-12-22 11:49:53,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9152034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308333257] [2021-12-22 11:49:53,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,744 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 11:49:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:53,759 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2021-12-22 11:49:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:53,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-22 11:49:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:53,760 INFO L225 Difference]: With dead ends: 360 [2021-12-22 11:49:53,761 INFO L226 Difference]: Without dead ends: 242 [2021-12-22 11:49:53,761 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 11:49:53,762 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 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 11:49:53,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-22 11:49:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-22 11:49:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5188284518828452) internal successors, (363), 239 states have internal predecessors, (363), 0 states have call successors, (0), 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 11:49:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2021-12-22 11:49:53,773 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2021-12-22 11:49:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,774 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2021-12-22 11:49:53,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 11:49:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2021-12-22 11:49:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 11:49:53,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,798 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:53,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:49:53,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2021-12-22 11:49:53,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792945391] [2021-12-22 11:49:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,873 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 11:49:53,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792945391] [2021-12-22 11:49:53,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792945391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957487830] [2021-12-22 11:49:53,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,878 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 11:49:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:53,909 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2021-12-22 11:49:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-22 11:49:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:53,912 INFO L225 Difference]: With dead ends: 612 [2021-12-22 11:49:53,913 INFO L226 Difference]: Without dead ends: 402 [2021-12-22 11:49:53,913 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 11:49:53,917 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 294 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 11:49:53,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 294 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-22 11:49:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-12-22 11:49:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.531328320802005) internal successors, (611), 399 states have internal predecessors, (611), 0 states have call successors, (0), 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 11:49:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2021-12-22 11:49:53,941 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2021-12-22 11:49:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:53,941 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2021-12-22 11:49:53,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 11:49:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2021-12-22 11:49:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 11:49:53,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:53,942 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:53,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:49:53,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2021-12-22 11:49:53,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678932330] [2021-12-22 11:49:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:53,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,983 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 11:49:53,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678932330] [2021-12-22 11:49:53,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678932330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083043917] [2021-12-22 11:49:53,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,987 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 11:49:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:54,033 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2021-12-22 11:49:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-22 11:49:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:54,037 INFO L225 Difference]: With dead ends: 1044 [2021-12-22 11:49:54,037 INFO L226 Difference]: Without dead ends: 674 [2021-12-22 11:49:54,038 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 11:49:54,044 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 285 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 11:49:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 285 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-22 11:49:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2021-12-22 11:49:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.5245901639344261) internal successors, (1023), 671 states have internal predecessors, (1023), 0 states have call successors, (0), 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 11:49:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2021-12-22 11:49:54,088 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2021-12-22 11:49:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2021-12-22 11:49:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 11:49:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2021-12-22 11:49:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 11:49:54,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:54,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:54,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:49:54,090 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2021-12-22 11:49:54,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:54,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62843178] [2021-12-22 11:49:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:54,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:54,159 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 11:49:54,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:54,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62843178] [2021-12-22 11:49:54,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62843178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:54,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:54,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:49:54,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080477224] [2021-12-22 11:49:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:49:54,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:49:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:54,161 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 11:49:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:54,343 INFO L93 Difference]: Finished difference Result 3882 states and 5988 transitions. [2021-12-22 11:49:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:49:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-22 11:49:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:54,355 INFO L225 Difference]: With dead ends: 3882 [2021-12-22 11:49:54,355 INFO L226 Difference]: Without dead ends: 3240 [2021-12-22 11:49:54,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:49:54,358 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 839 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:54,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1028 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-12-22 11:49:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1312. [2021-12-22 11:49:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.5125858123569793) internal successors, (1983), 1311 states have internal predecessors, (1983), 0 states have call successors, (0), 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 11:49:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1983 transitions. [2021-12-22 11:49:54,428 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1983 transitions. Word has length 56 [2021-12-22 11:49:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:54,429 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1983 transitions. [2021-12-22 11:49:54,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 11:49:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1983 transitions. [2021-12-22 11:49:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 11:49:54,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:54,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:54,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:49:54,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1072167829, now seen corresponding path program 1 times [2021-12-22 11:49:54,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293780760] [2021-12-22 11:49:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:54,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:54,544 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 11:49:54,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:54,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293780760] [2021-12-22 11:49:54,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293780760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:54,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:54,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:49:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362577138] [2021-12-22 11:49:54,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:54,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:49:54,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:49:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:54,548 INFO L87 Difference]: Start difference. First operand 1312 states and 1983 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 11:49:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:54,869 INFO L93 Difference]: Finished difference Result 5864 states and 8803 transitions. [2021-12-22 11:49:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:49:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-22 11:49:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:54,882 INFO L225 Difference]: With dead ends: 5864 [2021-12-22 11:49:54,883 INFO L226 Difference]: Without dead ends: 4582 [2021-12-22 11:49:54,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:54,886 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 453 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:54,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 556 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:49:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-12-22 11:49:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4576. [2021-12-22 11:49:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 1.4896174863387979) internal successors, (6815), 4575 states have internal predecessors, (6815), 0 states have call successors, (0), 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 11:49:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2021-12-22 11:49:55,168 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2021-12-22 11:49:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:55,168 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2021-12-22 11:49:55,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 11:49:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2021-12-22 11:49:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 11:49:55,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:55,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:55,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:49:55,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2021-12-22 11:49:55,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:55,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466051993] [2021-12-22 11:49:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:55,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:55,233 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 11:49:55,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466051993] [2021-12-22 11:49:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466051993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:55,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:55,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:55,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632868200] [2021-12-22 11:49:55,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:55,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:55,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:55,236 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:55,651 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2021-12-22 11:49:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:49:55,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-22 11:49:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:55,676 INFO L225 Difference]: With dead ends: 9634 [2021-12-22 11:49:55,676 INFO L226 Difference]: Without dead ends: 9632 [2021-12-22 11:49:55,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:49:55,680 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 294 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:55,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 588 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-22 11:49:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2021-12-22 11:49:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.451703972575116) internal successors, (7199), 4959 states have internal predecessors, (7199), 0 states have call successors, (0), 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 11:49:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2021-12-22 11:49:56,001 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2021-12-22 11:49:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,002 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2021-12-22 11:49:56,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2021-12-22 11:49:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 11:49:56,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:49:56,003 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2021-12-22 11:49:56,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567022429] [2021-12-22 11:49:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,057 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 11:49:56,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567022429] [2021-12-22 11:49:56,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567022429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:56,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76513253] [2021-12-22 11:49:56,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:56,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:56,060 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 11:49:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:56,354 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2021-12-22 11:49:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:56,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-22 11:49:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:56,385 INFO L225 Difference]: With dead ends: 11966 [2021-12-22 11:49:56,386 INFO L226 Difference]: Without dead ends: 7036 [2021-12-22 11:49:56,391 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 11:49:56,392 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:56,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2021-12-22 11:49:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2021-12-22 11:49:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.4458979098535476) internal successors, (10169), 7033 states have internal predecessors, (10169), 0 states have call successors, (0), 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 11:49:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2021-12-22 11:49:56,742 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2021-12-22 11:49:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,742 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2021-12-22 11:49:56,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 11:49:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2021-12-22 11:49:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 11:49:56,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:49:56,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2021-12-22 11:49:56,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404946182] [2021-12-22 11:49:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:56,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404946182] [2021-12-22 11:49:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404946182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:49:56,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590563985] [2021-12-22 11:49:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:49:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:56,868 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 11:49:56,913 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 11:49:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 11:49:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:49:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:57,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:49:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:57,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590563985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:49:57,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:49:57,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-22 11:49:57,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600193468] [2021-12-22 11:49:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:49:57,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 11:49:57,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 11:49:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:49:57,584 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 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 11:49:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:58,646 INFO L93 Difference]: Finished difference Result 26408 states and 38489 transitions. [2021-12-22 11:49:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:49:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 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 82 [2021-12-22 11:49:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:58,681 INFO L225 Difference]: With dead ends: 26408 [2021-12-22 11:49:58,681 INFO L226 Difference]: Without dead ends: 21478 [2021-12-22 11:49:58,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-22 11:49:58,692 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 935 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:58,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1187 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:49:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2021-12-22 11:49:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 20634. [2021-12-22 11:49:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20634 states, 20633 states have (on average 1.4389085445645327) internal successors, (29689), 20633 states have internal predecessors, (29689), 0 states have call successors, (0), 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 11:49:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20634 states to 20634 states and 29689 transitions. [2021-12-22 11:49:59,687 INFO L78 Accepts]: Start accepts. Automaton has 20634 states and 29689 transitions. Word has length 82 [2021-12-22 11:49:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:59,688 INFO L470 AbstractCegarLoop]: Abstraction has 20634 states and 29689 transitions. [2021-12-22 11:49:59,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 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 11:49:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20634 states and 29689 transitions. [2021-12-22 11:49:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:49:59,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:59,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:59,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:49:59,924 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,SelfDestructingSolverStorable10 [2021-12-22 11:49:59,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1896856622, now seen corresponding path program 1 times [2021-12-22 11:49:59,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:59,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109772173] [2021-12-22 11:49:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:59,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:59,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:59,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109772173] [2021-12-22 11:49:59,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109772173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:59,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:59,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:49:59,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653622984] [2021-12-22 11:49:59,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:59,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:49:59,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:49:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:59,990 INFO L87 Difference]: Start difference. First operand 20634 states and 29689 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 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 11:50:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:01,609 INFO L93 Difference]: Finished difference Result 44764 states and 64742 transitions. [2021-12-22 11:50:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:50:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 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 83 [2021-12-22 11:50:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:01,677 INFO L225 Difference]: With dead ends: 44764 [2021-12-22 11:50:01,677 INFO L226 Difference]: Without dead ends: 36086 [2021-12-22 11:50:01,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 11:50:01,697 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 660 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:01,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 891 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:50:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36086 states. [2021-12-22 11:50:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36086 to 27402. [2021-12-22 11:50:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27402 states, 27401 states have (on average 1.434436699390533) internal successors, (39305), 27401 states have internal predecessors, (39305), 0 states have call successors, (0), 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 11:50:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27402 states to 27402 states and 39305 transitions. [2021-12-22 11:50:02,994 INFO L78 Accepts]: Start accepts. Automaton has 27402 states and 39305 transitions. Word has length 83 [2021-12-22 11:50:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 27402 states and 39305 transitions. [2021-12-22 11:50:02,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 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 11:50:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27402 states and 39305 transitions. [2021-12-22 11:50:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:50:02,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:02,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:02,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:50:02,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2021-12-22 11:50:02,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:02,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942673610] [2021-12-22 11:50:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:03,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:03,022 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 11:50:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942673610] [2021-12-22 11:50:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942673610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:03,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361195316] [2021-12-22 11:50:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:03,024 INFO L87 Difference]: Start difference. First operand 27402 states and 39305 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:05,048 INFO L93 Difference]: Finished difference Result 67249 states and 96337 transitions. [2021-12-22 11:50:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-22 11:50:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:05,113 INFO L225 Difference]: With dead ends: 67249 [2021-12-22 11:50:05,113 INFO L226 Difference]: Without dead ends: 44207 [2021-12-22 11:50:05,151 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 11:50:05,152 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 272 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 11:50:05,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44207 states. [2021-12-22 11:50:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44207 to 42477. [2021-12-22 11:50:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42477 states, 42476 states have (on average 1.4172473867595818) internal successors, (60199), 42476 states have internal predecessors, (60199), 0 states have call successors, (0), 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 11:50:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42477 states to 42477 states and 60199 transitions. [2021-12-22 11:50:07,089 INFO L78 Accepts]: Start accepts. Automaton has 42477 states and 60199 transitions. Word has length 83 [2021-12-22 11:50:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:07,089 INFO L470 AbstractCegarLoop]: Abstraction has 42477 states and 60199 transitions. [2021-12-22 11:50:07,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42477 states and 60199 transitions. [2021-12-22 11:50:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:50:07,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:07,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:07,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:50:07,097 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1322927490, now seen corresponding path program 1 times [2021-12-22 11:50:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618049932] [2021-12-22 11:50:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:07,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:07,126 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 11:50:07,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618049932] [2021-12-22 11:50:07,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618049932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:07,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:07,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:07,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610743876] [2021-12-22 11:50:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:07,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:07,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:07,129 INFO L87 Difference]: Start difference. First operand 42477 states and 60199 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:09,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:09,097 INFO L93 Difference]: Finished difference Result 66562 states and 93995 transitions. [2021-12-22 11:50:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-22 11:50:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:09,186 INFO L225 Difference]: With dead ends: 66562 [2021-12-22 11:50:09,186 INFO L226 Difference]: Without dead ends: 43824 [2021-12-22 11:50:09,221 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 11:50:09,222 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 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 11:50:09,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2021-12-22 11:50:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 42568. [2021-12-22 11:50:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42568 states, 42567 states have (on average 1.3918293513754787) internal successors, (59246), 42567 states have internal predecessors, (59246), 0 states have call successors, (0), 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 11:50:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42568 states to 42568 states and 59246 transitions. [2021-12-22 11:50:11,308 INFO L78 Accepts]: Start accepts. Automaton has 42568 states and 59246 transitions. Word has length 83 [2021-12-22 11:50:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 42568 states and 59246 transitions. [2021-12-22 11:50:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42568 states and 59246 transitions. [2021-12-22 11:50:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:50:11,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:11,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:11,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:50:11,315 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 895581426, now seen corresponding path program 1 times [2021-12-22 11:50:11,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162935472] [2021-12-22 11:50:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:11,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:11,337 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 11:50:11,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162935472] [2021-12-22 11:50:11,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162935472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:11,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:11,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:11,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527417029] [2021-12-22 11:50:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:11,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:11,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:11,340 INFO L87 Difference]: Start difference. First operand 42568 states and 59246 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:14,032 INFO L93 Difference]: Finished difference Result 91626 states and 127103 transitions. [2021-12-22 11:50:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-22 11:50:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:14,122 INFO L225 Difference]: With dead ends: 91626 [2021-12-22 11:50:14,123 INFO L226 Difference]: Without dead ends: 58248 [2021-12-22 11:50:14,159 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 11:50:14,162 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 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 11:50:14,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58248 states. [2021-12-22 11:50:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58248 to 57217. [2021-12-22 11:50:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57217 states, 57216 states have (on average 1.3692149049217002) internal successors, (78341), 57216 states have internal predecessors, (78341), 0 states have call successors, (0), 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 11:50:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57217 states to 57217 states and 78341 transitions. [2021-12-22 11:50:17,793 INFO L78 Accepts]: Start accepts. Automaton has 57217 states and 78341 transitions. Word has length 83 [2021-12-22 11:50:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:17,793 INFO L470 AbstractCegarLoop]: Abstraction has 57217 states and 78341 transitions. [2021-12-22 11:50:17,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 57217 states and 78341 transitions. [2021-12-22 11:50:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:50:17,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:17,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:50:17,801 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2021-12-22 11:50:17,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661311974] [2021-12-22 11:50:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:17,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:17,841 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 11:50:17,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:17,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661311974] [2021-12-22 11:50:17,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661311974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:17,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:17,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:50:17,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633226759] [2021-12-22 11:50:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:17,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:50:17,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:50:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:17,843 INFO L87 Difference]: Start difference. First operand 57217 states and 78341 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 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 11:50:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:22,035 INFO L93 Difference]: Finished difference Result 111218 states and 153817 transitions. [2021-12-22 11:50:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:50:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 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 83 [2021-12-22 11:50:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:22,185 INFO L225 Difference]: With dead ends: 111218 [2021-12-22 11:50:22,186 INFO L226 Difference]: Without dead ends: 100464 [2021-12-22 11:50:22,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 11:50:22,207 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 668 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:22,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 822 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:50:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100464 states. [2021-12-22 11:50:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100464 to 67297. [2021-12-22 11:50:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 67296 states have (on average 1.3704975035663338) internal successors, (92229), 67296 states have internal predecessors, (92229), 0 states have call successors, (0), 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 11:50:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 92229 transitions. [2021-12-22 11:50:26,018 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 92229 transitions. Word has length 83 [2021-12-22 11:50:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 67297 states and 92229 transitions. [2021-12-22 11:50:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 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 11:50:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 92229 transitions. [2021-12-22 11:50:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 11:50:26,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:26,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:26,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:50:26,034 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2021-12-22 11:50:26,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:26,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60013074] [2021-12-22 11:50:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:26,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:26,084 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 11:50:26,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:26,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60013074] [2021-12-22 11:50:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60013074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:26,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:26,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:50:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020382346] [2021-12-22 11:50:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:50:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:50:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:26,086 INFO L87 Difference]: Start difference. First operand 67297 states and 92229 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)