./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY --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 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:55:10,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:55:10,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:55:10,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:55:10,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:55:10,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:55:10,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:55:10,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:55:10,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:55:10,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:55:10,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:55:10,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:55:10,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:55:10,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:55:10,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:55:10,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:55:10,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:55:10,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:55:10,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:55:10,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:55:10,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:55:10,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:55:10,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:55:10,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:55:10,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:55:10,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:55:10,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:55:10,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:55:10,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:55:10,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:55:10,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:55:10,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:55:10,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:55:10,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:55:10,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:55:10,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:55:10,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:55:10,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:55:10,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:55:10,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:55:10,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:55:10,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:55:10,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:55:10,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:55:10,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:55:10,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:55:10,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:55:10,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:55:10,806 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:55:10,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:55:10,807 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:55:10,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:55:10,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:55:10,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:55:10,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:55:10,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:55:10,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:55:10,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:55:10,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:55:10,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:55:10,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:55:10,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:55:10,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:55:10,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:55:10,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:55:10,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:55:10,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:55:10,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:55:10,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:55:10,812 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_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2021-11-07 07:55:11,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:55:11,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:55:11,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:55:11,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:55:11,136 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:55:11,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-07 07:55:11,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/data/a243462a7/7d336bc264b940b3a452660636a7aaa8/FLAG0ec040672 [2021-11-07 07:55:11,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:55:11,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-07 07:55:11,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/data/a243462a7/7d336bc264b940b3a452660636a7aaa8/FLAG0ec040672 [2021-11-07 07:55:12,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/data/a243462a7/7d336bc264b940b3a452660636a7aaa8 [2021-11-07 07:55:12,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:55:12,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:55:12,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:55:12,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:55:12,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:55:12,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:55:12" (1/1) ... [2021-11-07 07:55:12,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1bd601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:12, skipping insertion in model container [2021-11-07 07:55:12,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:55:12" (1/1) ... [2021-11-07 07:55:12,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:55:12,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:55:12,573 WARN L228 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_7655500e-1edf-4663-b06d-8cefd3285733/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-07 07:55:12,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:55:12,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:55:12,888 WARN L228 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_7655500e-1edf-4663-b06d-8cefd3285733/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-07 07:55:12,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:55:12,999 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:55:13,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13 WrapperNode [2021-11-07 07:55:13,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:55:13,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:55:13,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:55:13,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:55:13,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:13,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:14,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:55:14,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:55:14,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:55:14,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:55:14,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:14,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:14,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:14,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:15,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:15,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:16,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:16,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:55:16,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:55:16,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:55:16,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:55:16,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (1/1) ... [2021-11-07 07:55:16,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:55:16,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:16,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:55:16,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7655500e-1edf-4663-b06d-8cefd3285733/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:55:16,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:55:16,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:55:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:55:16,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:55:40,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:55:40,203 INFO L299 CfgBuilder]: Removed 3817 assume(true) statements. [2021-11-07 07:55:40,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:55:40 BoogieIcfgContainer [2021-11-07 07:55:40,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:55:40,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:55:40,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:55:40,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:55:40,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:55:12" (1/3) ... [2021-11-07 07:55:40,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac5ead8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:55:40, skipping insertion in model container [2021-11-07 07:55:40,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:55:13" (2/3) ... [2021-11-07 07:55:40,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac5ead8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:55:40, skipping insertion in model container [2021-11-07 07:55:40,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:55:40" (3/3) ... [2021-11-07 07:55:40,232 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2021-11-07 07:55:40,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:55:40,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 07:55:40,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:55:40,378 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 [2021-11-07 07:55:40,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 07:55:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 17333 states, 17322 states have (on average 1.8929684793903707) internal successors, (32790), 17332 states have internal predecessors, (32790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:55:40,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:40,740 INFO L513 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] [2021-11-07 07:55:40,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2075688270, now seen corresponding path program 1 times [2021-11-07 07:55:40,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:40,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395623563] [2021-11-07 07:55:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:40,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:41,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:41,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395623563] [2021-11-07 07:55:41,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395623563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:41,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:41,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:55:41,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030302541] [2021-11-07 07:55:41,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:55:41,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:55:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:55:41,385 INFO L87 Difference]: Start difference. First operand has 17333 states, 17322 states have (on average 1.8929684793903707) internal successors, (32790), 17332 states have internal predecessors, (32790), 0 states have call successors, (0), 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 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:44,947 INFO L93 Difference]: Finished difference Result 69157 states and 130829 transitions. [2021-11-07 07:55:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:55:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-11-07 07:55:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:45,385 INFO L225 Difference]: With dead ends: 69157 [2021-11-07 07:55:45,386 INFO L226 Difference]: Without dead ends: 51837 [2021-11-07 07:55:45,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:55:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51837 states. [2021-11-07 07:55:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51837 to 17341. [2021-11-07 07:55:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17341 states, 17331 states have (on average 1.8915815590560268) internal successors, (32783), 17340 states have internal predecessors, (32783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17341 states to 17341 states and 32783 transitions. [2021-11-07 07:55:46,918 INFO L78 Accepts]: Start accepts. Automaton has 17341 states and 32783 transitions. Word has length 30 [2021-11-07 07:55:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 17341 states and 32783 transitions. [2021-11-07 07:55:46,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 17341 states and 32783 transitions. [2021-11-07 07:55:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:55:46,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:46,924 INFO L513 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] [2021-11-07 07:55:46,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:55:46,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:46,926 INFO L85 PathProgramCache]: Analyzing trace with hash -383676273, now seen corresponding path program 1 times [2021-11-07 07:55:46,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:46,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150654418] [2021-11-07 07:55:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:46,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:47,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:47,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150654418] [2021-11-07 07:55:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150654418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:47,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:47,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:55:47,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773296286] [2021-11-07 07:55:47,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:55:47,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:55:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:55:47,073 INFO L87 Difference]: Start difference. First operand 17341 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:48,217 INFO L93 Difference]: Finished difference Result 34598 states and 65413 transitions. [2021-11-07 07:55:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:55:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-11-07 07:55:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:48,308 INFO L225 Difference]: With dead ends: 34598 [2021-11-07 07:55:48,309 INFO L226 Difference]: Without dead ends: 17271 [2021-11-07 07:55:48,344 INFO L786 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 [2021-11-07 07:55:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17271 states. [2021-11-07 07:55:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17271 to 17271. [2021-11-07 07:55:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17271 states, 17261 states have (on average 1.8911418805399456) internal successors, (32643), 17270 states have internal predecessors, (32643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17271 states to 17271 states and 32643 transitions. [2021-11-07 07:55:48,906 INFO L78 Accepts]: Start accepts. Automaton has 17271 states and 32643 transitions. Word has length 31 [2021-11-07 07:55:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:48,907 INFO L470 AbstractCegarLoop]: Abstraction has 17271 states and 32643 transitions. [2021-11-07 07:55:48,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17271 states and 32643 transitions. [2021-11-07 07:55:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:55:48,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:48,916 INFO L513 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] [2021-11-07 07:55:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:55:48,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1770955322, now seen corresponding path program 1 times [2021-11-07 07:55:48,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:48,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598876017] [2021-11-07 07:55:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:48,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:49,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:49,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598876017] [2021-11-07 07:55:49,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598876017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:49,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:49,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:55:49,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113299084] [2021-11-07 07:55:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:55:49,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:49,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:55:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:55:49,296 INFO L87 Difference]: Start difference. First operand 17271 states and 32643 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:50,257 INFO L93 Difference]: Finished difference Result 34516 states and 65249 transitions. [2021-11-07 07:55:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:55:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-07 07:55:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:50,337 INFO L225 Difference]: With dead ends: 34516 [2021-11-07 07:55:50,337 INFO L226 Difference]: Without dead ends: 17271 [2021-11-07 07:55:50,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:55:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17271 states. [2021-11-07 07:55:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17271 to 17271. [2021-11-07 07:55:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17271 states, 17261 states have (on average 1.8910260123978913) internal successors, (32641), 17270 states have internal predecessors, (32641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17271 states to 17271 states and 32641 transitions. [2021-11-07 07:55:50,974 INFO L78 Accepts]: Start accepts. Automaton has 17271 states and 32641 transitions. Word has length 34 [2021-11-07 07:55:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:50,974 INFO L470 AbstractCegarLoop]: Abstraction has 17271 states and 32641 transitions. [2021-11-07 07:55:50,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 17271 states and 32641 transitions. [2021-11-07 07:55:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:55:50,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:50,981 INFO L513 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] [2021-11-07 07:55:50,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:55:50,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -168508287, now seen corresponding path program 1 times [2021-11-07 07:55:50,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:50,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95842052] [2021-11-07 07:55:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:50,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:51,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95842052] [2021-11-07 07:55:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95842052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:51,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:55:51,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763607749] [2021-11-07 07:55:51,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:55:51,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:55:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:55:51,095 INFO L87 Difference]: Start difference. First operand 17271 states and 32641 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:52,127 INFO L93 Difference]: Finished difference Result 34516 states and 65246 transitions. [2021-11-07 07:55:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:55:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-07 07:55:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:52,198 INFO L225 Difference]: With dead ends: 34516 [2021-11-07 07:55:52,198 INFO L226 Difference]: Without dead ends: 17271 [2021-11-07 07:55:52,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:55:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17271 states. [2021-11-07 07:55:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17271 to 17271. [2021-11-07 07:55:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17271 states, 17261 states have (on average 1.890910144255837) internal successors, (32639), 17270 states have internal predecessors, (32639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17271 states to 17271 states and 32639 transitions. [2021-11-07 07:55:53,088 INFO L78 Accepts]: Start accepts. Automaton has 17271 states and 32639 transitions. Word has length 35 [2021-11-07 07:55:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:53,089 INFO L470 AbstractCegarLoop]: Abstraction has 17271 states and 32639 transitions. [2021-11-07 07:55:53,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17271 states and 32639 transitions. [2021-11-07 07:55:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:55:53,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:53,091 INFO L513 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] [2021-11-07 07:55:53,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:55:53,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1572315073, now seen corresponding path program 1 times [2021-11-07 07:55:53,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:53,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044252846] [2021-11-07 07:55:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:53,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:53,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:53,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044252846] [2021-11-07 07:55:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044252846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:53,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:53,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:55:53,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159864638] [2021-11-07 07:55:53,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:55:53,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:55:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:55:53,213 INFO L87 Difference]: Start difference. First operand 17271 states and 32639 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:53,979 INFO L93 Difference]: Finished difference Result 34516 states and 65243 transitions. [2021-11-07 07:55:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:55:53,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 07:55:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:54,035 INFO L225 Difference]: With dead ends: 34516 [2021-11-07 07:55:54,036 INFO L226 Difference]: Without dead ends: 17271 [2021-11-07 07:55:54,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:55:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17271 states. [2021-11-07 07:55:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17271 to 17271. [2021-11-07 07:55:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17271 states, 17261 states have (on average 1.8907942761137826) internal successors, (32637), 17270 states have internal predecessors, (32637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17271 states to 17271 states and 32637 transitions. [2021-11-07 07:55:54,807 INFO L78 Accepts]: Start accepts. Automaton has 17271 states and 32637 transitions. Word has length 36 [2021-11-07 07:55:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:54,807 INFO L470 AbstractCegarLoop]: Abstraction has 17271 states and 32637 transitions. [2021-11-07 07:55:54,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 17271 states and 32637 transitions. [2021-11-07 07:55:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 07:55:54,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:54,809 INFO L513 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] [2021-11-07 07:55:54,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:55:54,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -987130084, now seen corresponding path program 1 times [2021-11-07 07:55:54,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:54,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396110478] [2021-11-07 07:55:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:54,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:54,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:54,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396110478] [2021-11-07 07:55:54,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396110478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:54,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:54,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:55:54,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171451803] [2021-11-07 07:55:54,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:55:54,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:54,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:55:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:55:54,908 INFO L87 Difference]: Start difference. First operand 17271 states and 32637 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:55,696 INFO L93 Difference]: Finished difference Result 34516 states and 65240 transitions. [2021-11-07 07:55:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:55:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-07 07:55:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:55,755 INFO L225 Difference]: With dead ends: 34516 [2021-11-07 07:55:55,756 INFO L226 Difference]: Without dead ends: 17271 [2021-11-07 07:55:55,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:55:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17271 states. [2021-11-07 07:55:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17271 to 17271. [2021-11-07 07:55:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17271 states, 17261 states have (on average 1.8906784079717283) internal successors, (32635), 17270 states have internal predecessors, (32635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17271 states to 17271 states and 32635 transitions. [2021-11-07 07:55:56,588 INFO L78 Accepts]: Start accepts. Automaton has 17271 states and 32635 transitions. Word has length 37 [2021-11-07 07:55:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 17271 states and 32635 transitions. [2021-11-07 07:55:56,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17271 states and 32635 transitions. [2021-11-07 07:55:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:55:56,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:56,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:55:56,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:55:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 584054204, now seen corresponding path program 1 times [2021-11-07 07:55:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:56,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271416772] [2021-11-07 07:55:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:56,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:56,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271416772] [2021-11-07 07:55:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271416772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:56,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:55:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162117623] [2021-11-07 07:55:56,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:55:56,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:55:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:55:56,731 INFO L87 Difference]: Start difference. First operand 17271 states and 32635 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:00,229 INFO L93 Difference]: Finished difference Result 61981 states and 117052 transitions. [2021-11-07 07:56:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:56:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 07:56:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:00,314 INFO L225 Difference]: With dead ends: 61981 [2021-11-07 07:56:00,314 INFO L226 Difference]: Without dead ends: 44780 [2021-11-07 07:56:00,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:56:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44780 states. [2021-11-07 07:56:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44780 to 30774. [2021-11-07 07:56:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30774 states, 30764 states have (on average 1.8902613444285528) internal successors, (58152), 30773 states have internal predecessors, (58152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30774 states to 30774 states and 58152 transitions. [2021-11-07 07:56:02,106 INFO L78 Accepts]: Start accepts. Automaton has 30774 states and 58152 transitions. Word has length 38 [2021-11-07 07:56:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:02,107 INFO L470 AbstractCegarLoop]: Abstraction has 30774 states and 58152 transitions. [2021-11-07 07:56:02,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 30774 states and 58152 transitions. [2021-11-07 07:56:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:56:02,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:02,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:02,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:56:02,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:56:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash -108659753, now seen corresponding path program 1 times [2021-11-07 07:56:02,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:02,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72984835] [2021-11-07 07:56:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:02,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:02,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72984835] [2021-11-07 07:56:02,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72984835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:02,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:02,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:56:02,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23978078] [2021-11-07 07:56:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:56:02,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:56:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:56:02,247 INFO L87 Difference]: Start difference. First operand 30774 states and 58152 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:12,389 INFO L93 Difference]: Finished difference Result 255463 states and 482853 transitions. [2021-11-07 07:56:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:56:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 07:56:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:12,901 INFO L225 Difference]: With dead ends: 255463 [2021-11-07 07:56:12,901 INFO L226 Difference]: Without dead ends: 224759 [2021-11-07 07:56:12,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:56:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224759 states. [2021-11-07 07:56:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224759 to 56835. [2021-11-07 07:56:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56835 states, 56825 states have (on average 1.8860712714474264) internal successors, (107176), 56834 states have internal predecessors, (107176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56835 states to 56835 states and 107176 transitions. [2021-11-07 07:56:16,792 INFO L78 Accepts]: Start accepts. Automaton has 56835 states and 107176 transitions. Word has length 38 [2021-11-07 07:56:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:16,792 INFO L470 AbstractCegarLoop]: Abstraction has 56835 states and 107176 transitions. [2021-11-07 07:56:16,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 56835 states and 107176 transitions. [2021-11-07 07:56:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 07:56:16,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:16,793 INFO L513 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] [2021-11-07 07:56:16,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:56:16,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 07:56:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 567742291, now seen corresponding path program 1 times [2021-11-07 07:56:16,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:16,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342115839] [2021-11-07 07:56:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:16,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:16,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:16,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342115839] [2021-11-07 07:56:16,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342115839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:16,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:16,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:56:16,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590904441] [2021-11-07 07:56:16,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:56:16,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:56:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:16,854 INFO L87 Difference]: Start difference. First operand 56835 states and 107176 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)