./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL --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 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:19:36,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:19:36,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:19:36,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:19:36,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:19:36,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:19:36,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:19:36,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:19:36,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:19:36,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:19:36,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:19:36,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:19:36,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:19:36,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:19:36,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:19:36,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:19:36,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:19:36,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:19:36,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:19:36,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:19:36,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:19:36,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:19:36,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:19:36,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:19:36,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:19:36,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:19:36,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:19:36,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:19:36,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:19:36,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:19:36,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:19:36,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:19:36,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:19:36,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:19:36,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:19:36,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:19:36,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:19:36,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:19:36,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:19:36,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:19:36,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:19:36,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:19:36,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:19:36,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:19:36,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:19:36,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:19:36,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:19:36,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:19:36,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:19:36,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:19:36,771 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:19:36,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:19:36,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:19:36,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:19:36,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:19:36,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:19:36,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:19:36,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:19:36,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:19:36,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:19:36,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:19:36,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:19:36,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:19:36,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:19:36,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:19:36,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:19:36,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:19:36,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:19:36,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:19:36,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:19:36,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:19:36,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:19:36,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:19:36,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:19:36,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:19:36,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:19:36,781 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e [2021-11-19 04:19:37,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:19:37,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:19:37,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:19:37,120 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:19:37,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:19:37,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 04:19:37,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/data/de3bce95d/f96a6c625a084b63b595b61254efba06/FLAG1a7803e11 [2021-11-19 04:19:37,811 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:19:37,812 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 04:19:37,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/data/de3bce95d/f96a6c625a084b63b595b61254efba06/FLAG1a7803e11 [2021-11-19 04:19:38,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/data/de3bce95d/f96a6c625a084b63b595b61254efba06 [2021-11-19 04:19:38,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:19:38,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:19:38,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:19:38,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:19:38,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:19:38,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:38" (1/1) ... [2021-11-19 04:19:38,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571cd4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:38, skipping insertion in model container [2021-11-19 04:19:38,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:38" (1/1) ... [2021-11-19 04:19:38,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:19:38,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:19:38,612 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-19 04:19:38,764 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:19:38,779 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:19:38,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-19 04:19:38,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:19:39,020 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:19:39,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39 WrapperNode [2021-11-19 04:19:39,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:19:39,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:19:39,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:19:39,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:19:39,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,147 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1364 [2021-11-19 04:19:39,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:19:39,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:19:39,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:19:39,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:19:39,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:19:39,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:19:39,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:19:39,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:19:39,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (1/1) ... [2021-11-19 04:19:39,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:19:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:39,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:19:39,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba0255c-f389-49c2-aec2-ea60f07f4f03/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:19:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:19:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:19:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:19:39,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:19:39,630 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:19:39,631 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:19:40,754 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:19:40,774 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:19:40,775 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:19:40,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:40 BoogieIcfgContainer [2021-11-19 04:19:40,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:19:40,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:19:40,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:19:40,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:19:40,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:19:38" (1/3) ... [2021-11-19 04:19:40,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbe616f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:40, skipping insertion in model container [2021-11-19 04:19:40,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:39" (2/3) ... [2021-11-19 04:19:40,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbe616f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:40, skipping insertion in model container [2021-11-19 04:19:40,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:40" (3/3) ... [2021-11-19 04:19:40,794 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 04:19:40,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:19:40,801 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:19:40,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:19:40,868 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 [2021-11-19 04:19:40,868 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:19:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 342 states, 340 states have (on average 1.7970588235294118) internal successors, (611), 341 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) [2021-11-19 04:19:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 04:19:40,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:40,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:40,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1594884720, now seen corresponding path program 1 times [2021-11-19 04:19:40,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:40,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857742271] [2021-11-19 04:19:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:40,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:41,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:41,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857742271] [2021-11-19 04:19:41,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857742271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:41,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:41,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:41,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166594176] [2021-11-19 04:19:41,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:41,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:41,494 INFO L87 Difference]: Start difference. First operand has 342 states, 340 states have (on average 1.7970588235294118) internal successors, (611), 341 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) Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:41,681 INFO L93 Difference]: Finished difference Result 628 states and 1091 transitions. [2021-11-19 04:19:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-19 04:19:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:41,702 INFO L225 Difference]: With dead ends: 628 [2021-11-19 04:19:41,703 INFO L226 Difference]: Without dead ends: 473 [2021-11-19 04:19:41,707 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 [2021-11-19 04:19:41,711 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 256 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:41,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1132 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:19:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-19 04:19:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-11-19 04:19:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.6574468085106382) internal successors, (779), 470 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 779 transitions. [2021-11-19 04:19:41,818 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 779 transitions. Word has length 118 [2021-11-19 04:19:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:41,820 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 779 transitions. [2021-11-19 04:19:41,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 779 transitions. [2021-11-19 04:19:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 04:19:41,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:41,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:19:41,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -910979864, now seen corresponding path program 1 times [2021-11-19 04:19:41,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:41,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006737357] [2021-11-19 04:19:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:41,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:42,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:42,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006737357] [2021-11-19 04:19:42,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006737357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:42,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:42,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:42,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680019966] [2021-11-19 04:19:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:42,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:42,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:42,096 INFO L87 Difference]: Start difference. First operand 471 states and 779 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:42,183 INFO L93 Difference]: Finished difference Result 1007 states and 1675 transitions. [2021-11-19 04:19:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:42,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-19 04:19:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:42,191 INFO L225 Difference]: With dead ends: 1007 [2021-11-19 04:19:42,191 INFO L226 Difference]: Without dead ends: 729 [2021-11-19 04:19:42,194 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 [2021-11-19 04:19:42,199 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 218 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:42,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1075 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-11-19 04:19:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 727. [2021-11-19 04:19:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.6611570247933884) internal successors, (1206), 726 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1206 transitions. [2021-11-19 04:19:42,314 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1206 transitions. Word has length 121 [2021-11-19 04:19:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:42,317 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1206 transitions. [2021-11-19 04:19:42,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1206 transitions. [2021-11-19 04:19:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 04:19:42,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:42,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:42,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:19:42,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -195863697, now seen corresponding path program 1 times [2021-11-19 04:19:42,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:42,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550754234] [2021-11-19 04:19:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:42,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:42,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:42,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550754234] [2021-11-19 04:19:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550754234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:42,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:42,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:42,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663664606] [2021-11-19 04:19:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:42,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:42,517 INFO L87 Difference]: Start difference. First operand 727 states and 1206 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:42,607 INFO L93 Difference]: Finished difference Result 1755 states and 2920 transitions. [2021-11-19 04:19:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-19 04:19:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:42,620 INFO L225 Difference]: With dead ends: 1755 [2021-11-19 04:19:42,620 INFO L226 Difference]: Without dead ends: 1221 [2021-11-19 04:19:42,627 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 [2021-11-19 04:19:42,635 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 211 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:42,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1076 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-19 04:19:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1219. [2021-11-19 04:19:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.6600985221674878) internal successors, (2022), 1218 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2022 transitions. [2021-11-19 04:19:42,706 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2022 transitions. Word has length 124 [2021-11-19 04:19:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:42,708 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 2022 transitions. [2021-11-19 04:19:42,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2022 transitions. [2021-11-19 04:19:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 04:19:42,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:42,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:42,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:19:42,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1851247163, now seen corresponding path program 1 times [2021-11-19 04:19:42,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:42,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170290897] [2021-11-19 04:19:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:42,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:42,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:42,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170290897] [2021-11-19 04:19:42,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170290897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:42,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:42,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:42,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585513857] [2021-11-19 04:19:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:42,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:42,940 INFO L87 Difference]: Start difference. First operand 1219 states and 2022 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:43,086 INFO L93 Difference]: Finished difference Result 3191 states and 5296 transitions. [2021-11-19 04:19:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-19 04:19:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:43,105 INFO L225 Difference]: With dead ends: 3191 [2021-11-19 04:19:43,105 INFO L226 Difference]: Without dead ends: 2165 [2021-11-19 04:19:43,109 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 [2021-11-19 04:19:43,121 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 204 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:43,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1077 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-19 04:19:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2163. [2021-11-19 04:19:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.6549491211840888) internal successors, (3578), 2162 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3578 transitions. [2021-11-19 04:19:43,252 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3578 transitions. Word has length 127 [2021-11-19 04:19:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:43,253 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3578 transitions. [2021-11-19 04:19:43,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3578 transitions. [2021-11-19 04:19:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 04:19:43,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:43,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:43,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:19:43,258 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash -559497898, now seen corresponding path program 1 times [2021-11-19 04:19:43,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:43,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161474312] [2021-11-19 04:19:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:43,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:43,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161474312] [2021-11-19 04:19:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161474312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:43,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:43,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:19:43,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854779852] [2021-11-19 04:19:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:43,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:19:43,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:19:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:19:43,449 INFO L87 Difference]: Start difference. First operand 2163 states and 3578 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:44,296 INFO L93 Difference]: Finished difference Result 11283 states and 18810 transitions. [2021-11-19 04:19:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:19:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-19 04:19:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:44,371 INFO L225 Difference]: With dead ends: 11283 [2021-11-19 04:19:44,372 INFO L226 Difference]: Without dead ends: 9313 [2021-11-19 04:19:44,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:19:44,380 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 2036 mSDsluCounter, 4635 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 5187 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:44,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2036 Valid, 5187 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:19:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9313 states. [2021-11-19 04:19:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9313 to 4001. [2021-11-19 04:19:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 1.65525) internal successors, (6621), 4000 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 6621 transitions. [2021-11-19 04:19:44,859 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 6621 transitions. Word has length 130 [2021-11-19 04:19:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:44,860 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 6621 transitions. [2021-11-19 04:19:44,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 6621 transitions. [2021-11-19 04:19:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 04:19:44,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:44,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:19:44,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash -231627666, now seen corresponding path program 1 times [2021-11-19 04:19:44,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:44,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277623892] [2021-11-19 04:19:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:44,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:44,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:44,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277623892] [2021-11-19 04:19:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277623892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:44,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:44,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:19:44,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082716432] [2021-11-19 04:19:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:19:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:19:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:19:44,969 INFO L87 Difference]: Start difference. First operand 4001 states and 6621 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:45,685 INFO L93 Difference]: Finished difference Result 11713 states and 19481 transitions. [2021-11-19 04:19:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:19:45,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-19 04:19:45,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:45,741 INFO L225 Difference]: With dead ends: 11713 [2021-11-19 04:19:45,742 INFO L226 Difference]: Without dead ends: 7905 [2021-11-19 04:19:45,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:19:45,750 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 718 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:45,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1851 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:19:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2021-11-19 04:19:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 5936. [2021-11-19 04:19:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 5935 states have (on average 1.6572872788542545) internal successors, (9836), 5935 states have internal predecessors, (9836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 9836 transitions. [2021-11-19 04:19:46,295 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 9836 transitions. Word has length 131 [2021-11-19 04:19:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 5936 states and 9836 transitions. [2021-11-19 04:19:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 9836 transitions. [2021-11-19 04:19:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 04:19:46,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:46,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:46,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:19:46,304 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1540206583, now seen corresponding path program 1 times [2021-11-19 04:19:46,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:46,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718549951] [2021-11-19 04:19:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:46,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:46,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:46,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718549951] [2021-11-19 04:19:46,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718549951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:46,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:46,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:46,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200953591] [2021-11-19 04:19:46,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:46,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:46,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:46,391 INFO L87 Difference]: Start difference. First operand 5936 states and 9836 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:47,098 INFO L93 Difference]: Finished difference Result 13025 states and 21678 transitions. [2021-11-19 04:19:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-19 04:19:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:47,159 INFO L225 Difference]: With dead ends: 13025 [2021-11-19 04:19:47,160 INFO L226 Difference]: Without dead ends: 9024 [2021-11-19 04:19:47,170 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 [2021-11-19 04:19:47,172 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 226 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1256 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 [2021-11-19 04:19:47,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1256 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9024 states. [2021-11-19 04:19:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9024 to 9022. [2021-11-19 04:19:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 1.6572442079592062) internal successors, (14950), 9021 states have internal predecessors, (14950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 14950 transitions. [2021-11-19 04:19:47,894 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 14950 transitions. Word has length 132 [2021-11-19 04:19:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:47,895 INFO L470 AbstractCegarLoop]: Abstraction has 9022 states and 14950 transitions. [2021-11-19 04:19:47,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 14950 transitions. [2021-11-19 04:19:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 04:19:47,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:47,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:47,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:19:47,900 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash 579129211, now seen corresponding path program 1 times [2021-11-19 04:19:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:47,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474677069] [2021-11-19 04:19:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:47,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:47,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474677069] [2021-11-19 04:19:47,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474677069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:47,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:47,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112405281] [2021-11-19 04:19:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:47,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:47,997 INFO L87 Difference]: Start difference. First operand 9022 states and 14950 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:48,778 INFO L93 Difference]: Finished difference Result 17368 states and 28819 transitions. [2021-11-19 04:19:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-19 04:19:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:48,812 INFO L225 Difference]: With dead ends: 17368 [2021-11-19 04:19:48,813 INFO L226 Difference]: Without dead ends: 12606 [2021-11-19 04:19:48,823 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 [2021-11-19 04:19:48,824 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 219 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1232 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 [2021-11-19 04:19:48,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1232 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2021-11-19 04:19:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 12604. [2021-11-19 04:19:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12604 states, 12603 states have (on average 1.653574545743077) internal successors, (20840), 12603 states have internal predecessors, (20840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12604 states to 12604 states and 20840 transitions. [2021-11-19 04:19:49,682 INFO L78 Accepts]: Start accepts. Automaton has 12604 states and 20840 transitions. Word has length 132 [2021-11-19 04:19:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:49,683 INFO L470 AbstractCegarLoop]: Abstraction has 12604 states and 20840 transitions. [2021-11-19 04:19:49,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12604 states and 20840 transitions. [2021-11-19 04:19:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 04:19:49,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:49,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:49,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:19:49,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1676490411, now seen corresponding path program 1 times [2021-11-19 04:19:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:49,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510715087] [2021-11-19 04:19:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:49,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:49,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510715087] [2021-11-19 04:19:49,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510715087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:49,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:49,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:49,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334212691] [2021-11-19 04:19:49,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:49,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:49,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:49,785 INFO L87 Difference]: Start difference. First operand 12604 states and 20840 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:50,957 INFO L93 Difference]: Finished difference Result 24110 states and 39925 transitions. [2021-11-19 04:19:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:50,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-19 04:19:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:51,003 INFO L225 Difference]: With dead ends: 24110 [2021-11-19 04:19:51,003 INFO L226 Difference]: Without dead ends: 17468 [2021-11-19 04:19:51,017 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 [2021-11-19 04:19:51,018 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 212 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:51,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1199 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:19:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17468 states. [2021-11-19 04:19:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17468 to 17466. [2021-11-19 04:19:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17466 states, 17465 states have (on average 1.6494703693100488) internal successors, (28808), 17465 states have internal predecessors, (28808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 28808 transitions. [2021-11-19 04:19:52,096 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 28808 transitions. Word has length 132 [2021-11-19 04:19:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:52,097 INFO L470 AbstractCegarLoop]: Abstraction has 17466 states and 28808 transitions. [2021-11-19 04:19:52,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 28808 transitions. [2021-11-19 04:19:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 04:19:52,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:52,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:52,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:19:52,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1346972957, now seen corresponding path program 1 times [2021-11-19 04:19:52,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:52,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042713724] [2021-11-19 04:19:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:52,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:52,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:52,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042713724] [2021-11-19 04:19:52,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042713724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:52,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:52,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:19:52,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617815621] [2021-11-19 04:19:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:52,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:19:52,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:19:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:19:52,190 INFO L87 Difference]: Start difference. First operand 17466 states and 28808 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:54,017 INFO L93 Difference]: Finished difference Result 56537 states and 93383 transitions. [2021-11-19 04:19:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:19:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-19 04:19:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:54,149 INFO L225 Difference]: With dead ends: 56537 [2021-11-19 04:19:54,149 INFO L226 Difference]: Without dead ends: 39310 [2021-11-19 04:19:54,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:19:54,192 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 716 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:54,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 1612 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39310 states. [2021-11-19 04:19:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39310 to 28329. [2021-11-19 04:19:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28329 states, 28328 states have (on average 1.644909630048009) internal successors, (46597), 28328 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28329 states to 28329 states and 46597 transitions. [2021-11-19 04:19:55,619 INFO L78 Accepts]: Start accepts. Automaton has 28329 states and 46597 transitions. Word has length 132 [2021-11-19 04:19:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:55,620 INFO L470 AbstractCegarLoop]: Abstraction has 28329 states and 46597 transitions. [2021-11-19 04:19:55,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28329 states and 46597 transitions. [2021-11-19 04:19:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 04:19:55,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:55,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:55,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:19:55,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -434438713, now seen corresponding path program 1 times [2021-11-19 04:19:55,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:55,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569888014] [2021-11-19 04:19:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:55,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:55,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:55,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569888014] [2021-11-19 04:19:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569888014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:55,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:55,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:55,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975760549] [2021-11-19 04:19:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:55,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:19:55,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:19:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:19:55,702 INFO L87 Difference]: Start difference. First operand 28329 states and 46597 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:57,761 INFO L93 Difference]: Finished difference Result 54295 states and 89424 transitions. [2021-11-19 04:19:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:19:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-19 04:19:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:57,883 INFO L225 Difference]: With dead ends: 54295 [2021-11-19 04:19:57,884 INFO L226 Difference]: Without dead ends: 39073 [2021-11-19 04:19:57,919 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 [2021-11-19 04:19:57,920 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 205 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1166 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 [2021-11-19 04:19:57,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1166 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:19:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39073 states. [2021-11-19 04:19:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39073 to 39071. [2021-11-19 04:19:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39071 states, 39070 states have (on average 1.6393908369593038) internal successors, (64051), 39070 states have internal predecessors, (64051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39071 states to 39071 states and 64051 transitions. [2021-11-19 04:19:59,962 INFO L78 Accepts]: Start accepts. Automaton has 39071 states and 64051 transitions. Word has length 132 [2021-11-19 04:19:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:59,963 INFO L470 AbstractCegarLoop]: Abstraction has 39071 states and 64051 transitions. [2021-11-19 04:19:59,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:19:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39071 states and 64051 transitions. [2021-11-19 04:19:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 04:19:59,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:59,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:59,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:19:59,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1251457259, now seen corresponding path program 1 times [2021-11-19 04:19:59,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:59,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062886838] [2021-11-19 04:19:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:59,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:20:00,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:00,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062886838] [2021-11-19 04:20:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062886838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:00,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:00,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:20:00,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244459967] [2021-11-19 04:20:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:00,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:20:00,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:20:00,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:20:00,106 INFO L87 Difference]: Start difference. First operand 39071 states and 64051 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:04,197 INFO L93 Difference]: Finished difference Result 126537 states and 207711 transitions. [2021-11-19 04:20:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:20:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-19 04:20:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:04,455 INFO L225 Difference]: With dead ends: 126537 [2021-11-19 04:20:04,455 INFO L226 Difference]: Without dead ends: 87727 [2021-11-19 04:20:04,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:20:04,521 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 714 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:04,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1848 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:20:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87727 states. [2021-11-19 04:20:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87727 to 63256. [2021-11-19 04:20:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63256 states, 63255 states have (on average 1.6339894079519406) internal successors, (103358), 63255 states have internal predecessors, (103358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63256 states to 63256 states and 103358 transitions. [2021-11-19 04:20:07,896 INFO L78 Accepts]: Start accepts. Automaton has 63256 states and 103358 transitions. Word has length 133 [2021-11-19 04:20:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:07,896 INFO L470 AbstractCegarLoop]: Abstraction has 63256 states and 103358 transitions. [2021-11-19 04:20:07,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 63256 states and 103358 transitions. [2021-11-19 04:20:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 04:20:07,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:07,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:20:07,900 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:20:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash -193857308, now seen corresponding path program 1 times [2021-11-19 04:20:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:07,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015788837] [2021-11-19 04:20:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:07,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:20:07,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:07,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015788837] [2021-11-19 04:20:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015788837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:07,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:20:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135760539] [2021-11-19 04:20:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:07,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:20:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:20:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:20:07,989 INFO L87 Difference]: Start difference. First operand 63256 states and 103358 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:14,708 INFO L93 Difference]: Finished difference Result 202567 states and 331417 transitions. [2021-11-19 04:20:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:20:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-19 04:20:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:15,074 INFO L225 Difference]: With dead ends: 202567 [2021-11-19 04:20:15,074 INFO L226 Difference]: Without dead ends: 139572 [2021-11-19 04:20:15,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:20:15,186 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 712 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:15,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1850 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:20:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139572 states. [2021-11-19 04:20:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139572 to 101189. [2021-11-19 04:20:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101189 states, 101188 states have (on average 1.6286615013637982) internal successors, (164801), 101188 states have internal predecessors, (164801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101189 states to 101189 states and 164801 transitions. [2021-11-19 04:20:21,052 INFO L78 Accepts]: Start accepts. Automaton has 101189 states and 164801 transitions. Word has length 134 [2021-11-19 04:20:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:21,052 INFO L470 AbstractCegarLoop]: Abstraction has 101189 states and 164801 transitions. [2021-11-19 04:20:21,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:20:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 101189 states and 164801 transitions. [2021-11-19 04:20:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 04:20:21,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:21,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:21,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:20:21,054 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:20:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1164383125, now seen corresponding path program 1 times [2021-11-19 04:20:21,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:21,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837190117] [2021-11-19 04:20:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:21,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:20:21,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:21,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837190117] [2021-11-19 04:20:21,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837190117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:21,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:21,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:20:21,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400878869] [2021-11-19 04:20:21,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:21,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:20:21,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:20:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:20:21,283 INFO L87 Difference]: Start difference. First operand 101189 states and 164801 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)