./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product18.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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/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 e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:25:08,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:25:08,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:25:08,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:25:08,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:25:08,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:25:08,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:25:08,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:25:08,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:25:08,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:25:08,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:25:08,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:25:08,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:25:08,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:25:08,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:25:08,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:25:08,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:25:08,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:25:08,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:25:08,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:25:08,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:25:08,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:25:08,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:25:08,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:25:08,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:25:08,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:25:08,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:25:08,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:25:08,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:25:08,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:25:08,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:25:08,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:25:08,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:25:08,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:25:08,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:25:08,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:25:08,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:25:08,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:25:08,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:25:08,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:25:08,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:25:08,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:25:08,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:25:08,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:25:08,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:25:08,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:25:08,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:25:08,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:25:08,804 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:25:08,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:25:08,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:25:08,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:25:08,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:25:08,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:25:08,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:25:08,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:25:08,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:25:08,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:25:08,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:25:08,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:25:08,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:25:08,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:25:08,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:25:08,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:25:08,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:08,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:25:08,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:25:08,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:25:08,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:25:08,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:25:08,812 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:25:08,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:25:08,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:25:08,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:25:08,815 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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf [2021-11-07 07:25:09,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:25:09,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:25:09,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:25:09,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:25:09,160 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:25:09,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 07:25:09,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/data/7f9911a6d/088af1049f124566abb97c2f0b985c81/FLAG03442c077 [2021-11-07 07:25:09,931 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:25:09,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 07:25:09,972 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/data/7f9911a6d/088af1049f124566abb97c2f0b985c81/FLAG03442c077 [2021-11-07 07:25:10,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/data/7f9911a6d/088af1049f124566abb97c2f0b985c81 [2021-11-07 07:25:10,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:25:10,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:25:10,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:10,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:25:10,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:25:10,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:10" (1/1) ... [2021-11-07 07:25:10,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f285bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:10, skipping insertion in model container [2021-11-07 07:25:10,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:10" (1/1) ... [2021-11-07 07:25:10,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:25:10,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:25:10,970 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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 07:25:10,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:10,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:25:11,092 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_ee967d2c-b75f-4246-bd9f-c162cbc009e7/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 07:25:11,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:11,155 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:25:11,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11 WrapperNode [2021-11-07 07:25:11,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:11,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:25:11,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:25:11,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:25:11,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:25:11,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:25:11,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:25:11,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:25:11,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:25:11,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:25:11,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:25:11,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:25:11,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (1/1) ... [2021-11-07 07:25:11,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:11,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:11,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:25:11,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:25:11,619 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 07:25:11,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:25:11,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:25:11,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:25:11,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:25:14,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:25:14,067 INFO L299 CfgBuilder]: Removed 267 assume(true) statements. [2021-11-07 07:25:14,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:14 BoogieIcfgContainer [2021-11-07 07:25:14,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:25:14,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:25:14,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:25:14,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:25:14,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:25:10" (1/3) ... [2021-11-07 07:25:14,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615d0798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:14, skipping insertion in model container [2021-11-07 07:25:14,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:11" (2/3) ... [2021-11-07 07:25:14,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615d0798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:14, skipping insertion in model container [2021-11-07 07:25:14,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:14" (3/3) ... [2021-11-07 07:25:14,082 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product18.cil.c [2021-11-07 07:25:14,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:25:14,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:25:14,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:25:14,157 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 07:25:14,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:25:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 426 states have (on average 1.7699530516431925) internal successors, (754), 428 states have internal predecessors, (754), 0 states have call successors, (0), 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 07:25:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:25:14,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:14,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:14,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -167129029, now seen corresponding path program 1 times [2021-11-07 07:25:14,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:14,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378201751] [2021-11-07 07:25:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:14,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:14,625 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 07:25:14,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378201751] [2021-11-07 07:25:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378201751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:14,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:14,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:14,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686932373] [2021-11-07 07:25:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:14,655 INFO L87 Difference]: Start difference. First operand has 429 states, 426 states have (on average 1.7699530516431925) internal successors, (754), 428 states have internal predecessors, (754), 0 states have call successors, (0), 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 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:25:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:14,791 INFO L93 Difference]: Finished difference Result 1252 states and 2204 transitions. [2021-11-07 07:25:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 07:25:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:14,831 INFO L225 Difference]: With dead ends: 1252 [2021-11-07 07:25:14,832 INFO L226 Difference]: Without dead ends: 804 [2021-11-07 07:25:14,840 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 07:25:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-11-07 07:25:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 411. [2021-11-07 07:25:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.7555012224938875) internal successors, (718), 410 states have internal predecessors, (718), 0 states have call successors, (0), 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 07:25:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 718 transitions. [2021-11-07 07:25:14,939 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 718 transitions. Word has length 48 [2021-11-07 07:25:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:14,939 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 718 transitions. [2021-11-07 07:25:14,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:25:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 718 transitions. [2021-11-07 07:25:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:25:14,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:14,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:14,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:25:14,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1311500302, now seen corresponding path program 1 times [2021-11-07 07:25:14,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:14,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335440171] [2021-11-07 07:25:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:14,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:15,079 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 07:25:15,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:15,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335440171] [2021-11-07 07:25:15,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335440171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:15,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:15,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:15,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670033371] [2021-11-07 07:25:15,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:15,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:15,084 INFO L87 Difference]: Start difference. First operand 411 states and 718 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 07:25:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:15,261 INFO L93 Difference]: Finished difference Result 1182 states and 2070 transitions. [2021-11-07 07:25:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:25:15,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-07 07:25:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:15,269 INFO L225 Difference]: With dead ends: 1182 [2021-11-07 07:25:15,269 INFO L226 Difference]: Without dead ends: 790 [2021-11-07 07:25:15,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:25:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-07 07:25:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 411. [2021-11-07 07:25:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.7530562347188263) internal successors, (717), 410 states have internal predecessors, (717), 0 states have call successors, (0), 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 07:25:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 717 transitions. [2021-11-07 07:25:15,301 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 717 transitions. Word has length 50 [2021-11-07 07:25:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:15,302 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 717 transitions. [2021-11-07 07:25:15,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 07:25:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 717 transitions. [2021-11-07 07:25:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:25:15,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:15,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:15,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:25:15,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1098779109, now seen corresponding path program 1 times [2021-11-07 07:25:15,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:15,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794640096] [2021-11-07 07:25:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:15,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:15,497 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 07:25:15,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:15,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794640096] [2021-11-07 07:25:15,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794640096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:15,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130350994] [2021-11-07 07:25:15,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:15,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:15,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:15,511 INFO L87 Difference]: Start difference. First operand 411 states and 717 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 07:25:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:15,553 INFO L93 Difference]: Finished difference Result 804 states and 1408 transitions. [2021-11-07 07:25:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-07 07:25:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:15,561 INFO L225 Difference]: With dead ends: 804 [2021-11-07 07:25:15,561 INFO L226 Difference]: Without dead ends: 416 [2021-11-07 07:25:15,563 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 07:25:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-07 07:25:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 411. [2021-11-07 07:25:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.7506112469437654) internal successors, (716), 410 states have internal predecessors, (716), 0 states have call successors, (0), 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 07:25:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 716 transitions. [2021-11-07 07:25:15,587 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 716 transitions. Word has length 51 [2021-11-07 07:25:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:15,588 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 716 transitions. [2021-11-07 07:25:15,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 07:25:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 716 transitions. [2021-11-07 07:25:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:25:15,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:15,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:15,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:25:15,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1661226655, now seen corresponding path program 1 times [2021-11-07 07:25:15,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:15,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880359824] [2021-11-07 07:25:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:15,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:15,733 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 07:25:15,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:15,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880359824] [2021-11-07 07:25:15,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880359824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:15,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:15,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:15,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485392202] [2021-11-07 07:25:15,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:15,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:15,737 INFO L87 Difference]: Start difference. First operand 411 states and 716 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:15,779 INFO L93 Difference]: Finished difference Result 814 states and 1421 transitions. [2021-11-07 07:25:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 07:25:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:15,784 INFO L225 Difference]: With dead ends: 814 [2021-11-07 07:25:15,784 INFO L226 Difference]: Without dead ends: 411 [2021-11-07 07:25:15,785 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 07:25:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-07 07:25:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2021-11-07 07:25:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.745721271393643) internal successors, (714), 410 states have internal predecessors, (714), 0 states have call successors, (0), 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 07:25:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 714 transitions. [2021-11-07 07:25:15,808 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 714 transitions. Word has length 52 [2021-11-07 07:25:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:15,809 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 714 transitions. [2021-11-07 07:25:15,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 714 transitions. [2021-11-07 07:25:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:25:15,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:15,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:15,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:25:15,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -755664714, now seen corresponding path program 1 times [2021-11-07 07:25:15,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:15,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075847925] [2021-11-07 07:25:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:15,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:15,947 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 07:25:15,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075847925] [2021-11-07 07:25:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075847925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:15,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:15,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069098942] [2021-11-07 07:25:15,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:15,951 INFO L87 Difference]: Start difference. First operand 411 states and 714 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:16,120 INFO L93 Difference]: Finished difference Result 1172 states and 2050 transitions. [2021-11-07 07:25:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:25:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 07:25:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:16,128 INFO L225 Difference]: With dead ends: 1172 [2021-11-07 07:25:16,129 INFO L226 Difference]: Without dead ends: 788 [2021-11-07 07:25:16,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-07 07:25:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 411. [2021-11-07 07:25:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.743276283618582) internal successors, (713), 410 states have internal predecessors, (713), 0 states have call successors, (0), 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 07:25:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 713 transitions. [2021-11-07 07:25:16,163 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 713 transitions. Word has length 53 [2021-11-07 07:25:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:16,164 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 713 transitions. [2021-11-07 07:25:16,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 713 transitions. [2021-11-07 07:25:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:25:16,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:16,168 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:25:16,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 574282393, now seen corresponding path program 1 times [2021-11-07 07:25:16,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390446548] [2021-11-07 07:25:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,297 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 07:25:16,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390446548] [2021-11-07 07:25:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390446548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:16,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:16,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:16,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282048184] [2021-11-07 07:25:16,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:16,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:16,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:16,307 INFO L87 Difference]: Start difference. First operand 411 states and 713 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:16,514 INFO L93 Difference]: Finished difference Result 1177 states and 2055 transitions. [2021-11-07 07:25:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:25:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 07:25:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:16,522 INFO L225 Difference]: With dead ends: 1177 [2021-11-07 07:25:16,523 INFO L226 Difference]: Without dead ends: 793 [2021-11-07 07:25:16,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-11-07 07:25:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 411. [2021-11-07 07:25:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.7408312958435208) internal successors, (712), 410 states have internal predecessors, (712), 0 states have call successors, (0), 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 07:25:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 712 transitions. [2021-11-07 07:25:16,565 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 712 transitions. Word has length 54 [2021-11-07 07:25:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:16,565 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 712 transitions. [2021-11-07 07:25:16,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 712 transitions. [2021-11-07 07:25:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 07:25:16,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:16,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:16,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:25:16,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash -314537551, now seen corresponding path program 1 times [2021-11-07 07:25:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946837646] [2021-11-07 07:25:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,643 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 07:25:16,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:16,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946837646] [2021-11-07 07:25:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946837646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:16,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:16,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:16,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812995428] [2021-11-07 07:25:16,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:16,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:16,647 INFO L87 Difference]: Start difference. First operand 411 states and 712 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:16,680 INFO L93 Difference]: Finished difference Result 584 states and 1000 transitions. [2021-11-07 07:25:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 07:25:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:16,685 INFO L225 Difference]: With dead ends: 584 [2021-11-07 07:25:16,685 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 07:25:16,686 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 07:25:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 07:25:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2021-11-07 07:25:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 411 states have (on average 1.7372262773722629) internal successors, (714), 412 states have internal predecessors, (714), 0 states have call successors, (0), 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 07:25:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 714 transitions. [2021-11-07 07:25:16,716 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 714 transitions. Word has length 55 [2021-11-07 07:25:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:16,717 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 714 transitions. [2021-11-07 07:25:16,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 714 transitions. [2021-11-07 07:25:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:25:16,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:16,719 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:25:16,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -976462689, now seen corresponding path program 1 times [2021-11-07 07:25:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986154894] [2021-11-07 07:25:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:16,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:16,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986154894] [2021-11-07 07:25:16,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986154894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:16,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:16,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:16,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159996443] [2021-11-07 07:25:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:16,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:16,795 INFO L87 Difference]: Start difference. First operand 413 states and 714 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 07:25:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:16,886 INFO L93 Difference]: Finished difference Result 1125 states and 1966 transitions. [2021-11-07 07:25:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 07:25:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:16,894 INFO L225 Difference]: With dead ends: 1125 [2021-11-07 07:25:16,894 INFO L226 Difference]: Without dead ends: 743 [2021-11-07 07:25:16,896 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 07:25:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-07 07:25:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 573. [2021-11-07 07:25:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 571 states have (on average 1.7635726795096323) internal successors, (1007), 572 states have internal predecessors, (1007), 0 states have call successors, (0), 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 07:25:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1007 transitions. [2021-11-07 07:25:16,944 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1007 transitions. Word has length 63 [2021-11-07 07:25:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:16,945 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1007 transitions. [2021-11-07 07:25:16,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 07:25:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1007 transitions. [2021-11-07 07:25:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:25:16,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:16,948 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:16,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:25:16,949 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1102022530, now seen corresponding path program 1 times [2021-11-07 07:25:16,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734233018] [2021-11-07 07:25:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:17,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:17,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734233018] [2021-11-07 07:25:17,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734233018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:17,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:17,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:17,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126764438] [2021-11-07 07:25:17,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:17,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:17,080 INFO L87 Difference]: Start difference. First operand 573 states and 1007 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 07:25:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:17,476 INFO L93 Difference]: Finished difference Result 1649 states and 2927 transitions. [2021-11-07 07:25:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:25:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 07:25:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:17,487 INFO L225 Difference]: With dead ends: 1649 [2021-11-07 07:25:17,487 INFO L226 Difference]: Without dead ends: 1107 [2021-11-07 07:25:17,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-07 07:25:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 573. [2021-11-07 07:25:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 571 states have (on average 1.7600700525394046) internal successors, (1005), 572 states have internal predecessors, (1005), 0 states have call successors, (0), 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 07:25:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1005 transitions. [2021-11-07 07:25:17,581 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1005 transitions. Word has length 64 [2021-11-07 07:25:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:17,581 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1005 transitions. [2021-11-07 07:25:17,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 07:25:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1005 transitions. [2021-11-07 07:25:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:25:17,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:17,584 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:17,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:25:17,584 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash -413552043, now seen corresponding path program 1 times [2021-11-07 07:25:17,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:17,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344889779] [2021-11-07 07:25:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:17,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:17,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344889779] [2021-11-07 07:25:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344889779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:17,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:17,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528735953] [2021-11-07 07:25:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:17,671 INFO L87 Difference]: Start difference. First operand 573 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 07:25:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:17,772 INFO L93 Difference]: Finished difference Result 1647 states and 2919 transitions. [2021-11-07 07:25:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 07:25:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:17,782 INFO L225 Difference]: With dead ends: 1647 [2021-11-07 07:25:17,783 INFO L226 Difference]: Without dead ends: 1105 [2021-11-07 07:25:17,784 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 07:25:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-11-07 07:25:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 935. [2021-11-07 07:25:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 933 states have (on average 1.787781350482315) internal successors, (1668), 934 states have internal predecessors, (1668), 0 states have call successors, (0), 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 07:25:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1668 transitions. [2021-11-07 07:25:17,869 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1668 transitions. Word has length 65 [2021-11-07 07:25:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1668 transitions. [2021-11-07 07:25:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 07:25:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1668 transitions. [2021-11-07 07:25:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:25:17,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:17,879 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:17,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:25:17,880 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash -369162253, now seen corresponding path program 1 times [2021-11-07 07:25:17,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:17,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186292583] [2021-11-07 07:25:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:17,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:18,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:18,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186292583] [2021-11-07 07:25:18,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186292583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:18,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339736605] [2021-11-07 07:25:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:18,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:18,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:25:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:25:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:18,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339736605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:18,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:18,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:25:18,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386777712] [2021-11-07 07:25:18,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:18,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:18,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:18,614 INFO L87 Difference]: Start difference. First operand 935 states and 1668 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:18,771 INFO L93 Difference]: Finished difference Result 1494 states and 2632 transitions. [2021-11-07 07:25:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:25:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:18,783 INFO L225 Difference]: With dead ends: 1494 [2021-11-07 07:25:18,783 INFO L226 Difference]: Without dead ends: 1324 [2021-11-07 07:25:18,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-07 07:25:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1151. [2021-11-07 07:25:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1149 states have (on average 1.7911227154046998) internal successors, (2058), 1150 states have internal predecessors, (2058), 0 states have call successors, (0), 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 07:25:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2058 transitions. [2021-11-07 07:25:18,916 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2058 transitions. Word has length 65 [2021-11-07 07:25:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 2058 transitions. [2021-11-07 07:25:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2058 transitions. [2021-11-07 07:25:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:25:18,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:18,922 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, 1, 1, 1, 1, 1, 1, 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 07:25:18,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:19,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee967d2c-b75f-4246-bd9f-c162cbc009e7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:25:19,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1761324656, now seen corresponding path program 1 times [2021-11-07 07:25:19,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:19,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017947590] [2021-11-07 07:25:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:19,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,234 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 07:25:19,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:19,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017947590] [2021-11-07 07:25:19,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017947590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:19,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:19,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:19,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952905677] [2021-11-07 07:25:19,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:19,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:19,238 INFO L87 Difference]: Start difference. First operand 1151 states and 2058 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:19,406 INFO L93 Difference]: Finished difference Result 3087 states and 5548 transitions. [2021-11-07 07:25:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:19,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 07:25:19,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:19,425 INFO L225 Difference]: With dead ends: 3087 [2021-11-07 07:25:19,426 INFO L226 Difference]: Without dead ends: 2037 [2021-11-07 07:25:19,428 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 07:25:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-11-07 07:25:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1867. [2021-11-07 07:25:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1865 states have (on average 1.8032171581769436) internal successors, (3363), 1866 states have internal predecessors, (3363), 0 states have call successors, (0), 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 07:25:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3363 transitions. [2021-11-07 07:25:19,625 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3363 transitions. Word has length 69 [2021-11-07 07:25:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 3363 transitions. [2021-11-07 07:25:19,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3363 transitions. [2021-11-07 07:25:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:25:19,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:19,632 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, 1, 1, 1, 1, 1, 1, 1, 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 07:25:19,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:25:19,633 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash -745059344, now seen corresponding path program 1 times [2021-11-07 07:25:19,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:19,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500701888] [2021-11-07 07:25:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:19,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,720 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 07:25:19,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500701888] [2021-11-07 07:25:19,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500701888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:19,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:19,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811847420] [2021-11-07 07:25:19,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:19,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:19,724 INFO L87 Difference]: Start difference. First operand 1867 states and 3363 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:25:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:19,955 INFO L93 Difference]: Finished difference Result 4971 states and 8982 transitions. [2021-11-07 07:25:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:19,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:25:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:19,982 INFO L225 Difference]: With dead ends: 4971 [2021-11-07 07:25:19,983 INFO L226 Difference]: Without dead ends: 3239 [2021-11-07 07:25:19,989 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 07:25:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-11-07 07:25:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3069. [2021-11-07 07:25:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3067 states have (on average 1.8089338115422238) internal successors, (5548), 3068 states have internal predecessors, (5548), 0 states have call successors, (0), 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 07:25:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 5548 transitions. [2021-11-07 07:25:20,288 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 5548 transitions. Word has length 70 [2021-11-07 07:25:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:20,288 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 5548 transitions. [2021-11-07 07:25:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:25:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 5548 transitions. [2021-11-07 07:25:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:25:20,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:20,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:20,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:25:20,296 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1574191137, now seen corresponding path program 1 times [2021-11-07 07:25:20,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:20,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932787135] [2021-11-07 07:25:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:20,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:20,375 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 07:25:20,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:20,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932787135] [2021-11-07 07:25:20,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932787135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:20,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:20,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:20,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551685579] [2021-11-07 07:25:20,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:20,381 INFO L87 Difference]: Start difference. First operand 3069 states and 5548 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:25:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:20,760 INFO L93 Difference]: Finished difference Result 8293 states and 15020 transitions. [2021-11-07 07:25:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-07 07:25:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:20,803 INFO L225 Difference]: With dead ends: 8293 [2021-11-07 07:25:20,804 INFO L226 Difference]: Without dead ends: 5393 [2021-11-07 07:25:20,810 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 07:25:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2021-11-07 07:25:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5223. [2021-11-07 07:25:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5223 states, 5221 states have (on average 1.8105726872246697) internal successors, (9453), 5222 states have internal predecessors, (9453), 0 states have call successors, (0), 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 07:25:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 9453 transitions. [2021-11-07 07:25:21,321 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 9453 transitions. Word has length 71 [2021-11-07 07:25:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:21,321 INFO L470 AbstractCegarLoop]: Abstraction has 5223 states and 9453 transitions. [2021-11-07 07:25:21,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:25:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 9453 transitions. [2021-11-07 07:25:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:25:21,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:21,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:21,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:25:21,334 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1919847553, now seen corresponding path program 1 times [2021-11-07 07:25:21,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:21,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019338432] [2021-11-07 07:25:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:21,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:21,410 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 07:25:21,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:21,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019338432] [2021-11-07 07:25:21,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019338432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:21,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:21,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650089042] [2021-11-07 07:25:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:21,419 INFO L87 Difference]: Start difference. First operand 5223 states and 9453 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:22,156 INFO L93 Difference]: Finished difference Result 15213 states and 27577 transitions. [2021-11-07 07:25:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 07:25:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:22,227 INFO L225 Difference]: With dead ends: 15213 [2021-11-07 07:25:22,228 INFO L226 Difference]: Without dead ends: 10163 [2021-11-07 07:25:22,239 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 07:25:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-11-07 07:25:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 9993. [2021-11-07 07:25:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9991 states have (on average 1.811029926934241) internal successors, (18094), 9992 states have internal predecessors, (18094), 0 states have call successors, (0), 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 07:25:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 18094 transitions. [2021-11-07 07:25:23,060 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 18094 transitions. Word has length 72 [2021-11-07 07:25:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:23,061 INFO L470 AbstractCegarLoop]: Abstraction has 9993 states and 18094 transitions. [2021-11-07 07:25:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 18094 transitions. [2021-11-07 07:25:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:25:23,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:23,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:23,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:25:23,074 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1449427056, now seen corresponding path program 1 times [2021-11-07 07:25:23,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:23,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791519398] [2021-11-07 07:25:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:23,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:23,157 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 07:25:23,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:23,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791519398] [2021-11-07 07:25:23,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791519398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:23,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:23,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:23,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964432949] [2021-11-07 07:25:23,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:23,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:23,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:23,161 INFO L87 Difference]: Start difference. First operand 9993 states and 18094 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 07:25:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:24,534 INFO L93 Difference]: Finished difference Result 29225 states and 52975 transitions. [2021-11-07 07:25:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 07:25:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:24,617 INFO L225 Difference]: With dead ends: 29225 [2021-11-07 07:25:24,618 INFO L226 Difference]: Without dead ends: 19413 [2021-11-07 07:25:24,637 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 07:25:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19413 states. [2021-11-07 07:25:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19413 to 19243. [2021-11-07 07:25:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19243 states, 19241 states have (on average 1.8102489475598982) internal successors, (34831), 19242 states have internal predecessors, (34831), 0 states have call successors, (0), 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 07:25:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19243 states to 19243 states and 34831 transitions. [2021-11-07 07:25:26,154 INFO L78 Accepts]: Start accepts. Automaton has 19243 states and 34831 transitions. Word has length 73 [2021-11-07 07:25:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:26,155 INFO L470 AbstractCegarLoop]: Abstraction has 19243 states and 34831 transitions. [2021-11-07 07:25:26,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 07:25:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19243 states and 34831 transitions. [2021-11-07 07:25:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:25:26,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:26,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:25:26,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 311731011, now seen corresponding path program 1 times [2021-11-07 07:25:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:26,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735650487] [2021-11-07 07:25:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:26,234 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 07:25:26,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:26,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735650487] [2021-11-07 07:25:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735650487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:26,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:26,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:26,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483815441] [2021-11-07 07:25:26,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:26,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:26,237 INFO L87 Difference]: Start difference. First operand 19243 states and 34831 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 07:25:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:28,267 INFO L93 Difference]: Finished difference Result 57161 states and 103500 transitions. [2021-11-07 07:25:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 07:25:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:28,404 INFO L225 Difference]: With dead ends: 57161 [2021-11-07 07:25:28,404 INFO L226 Difference]: Without dead ends: 38103 [2021-11-07 07:25:28,432 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 07:25:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38103 states. [2021-11-07 07:25:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38103 to 37933. [2021-11-07 07:25:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37933 states, 37931 states have (on average 1.8074925522659566) internal successors, (68560), 37932 states have internal predecessors, (68560), 0 states have call successors, (0), 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 07:25:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68560 transitions. [2021-11-07 07:25:31,065 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68560 transitions. Word has length 74 [2021-11-07 07:25:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:31,065 INFO L470 AbstractCegarLoop]: Abstraction has 37933 states and 68560 transitions. [2021-11-07 07:25:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 07:25:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68560 transitions. [2021-11-07 07:25:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:25:31,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:31,083 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:31,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:25:31,084 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2121742825, now seen corresponding path program 1 times [2021-11-07 07:25:31,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:31,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736971558] [2021-11-07 07:25:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:31,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:25:31,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:31,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736971558] [2021-11-07 07:25:31,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736971558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:31,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:31,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:31,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841076101] [2021-11-07 07:25:31,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:31,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:31,384 INFO L87 Difference]: Start difference. First operand 37933 states and 68560 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:25:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:33,989 INFO L93 Difference]: Finished difference Result 111502 states and 201493 transitions. [2021-11-07 07:25:33,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:33,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 75 [2021-11-07 07:25:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:34,260 INFO L225 Difference]: With dead ends: 111502 [2021-11-07 07:25:34,260 INFO L226 Difference]: Without dead ends: 73822 [2021-11-07 07:25:34,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:25:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73822 states. [2021-11-07 07:25:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73822 to 37933. [2021-11-07 07:25:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37933 states, 37931 states have (on average 1.8006907279006616) internal successors, (68302), 37932 states have internal predecessors, (68302), 0 states have call successors, (0), 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 07:25:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68302 transitions. [2021-11-07 07:25:37,078 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68302 transitions. Word has length 75 [2021-11-07 07:25:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:37,079 INFO L470 AbstractCegarLoop]: Abstraction has 37933 states and 68302 transitions. [2021-11-07 07:25:37,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:25:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68302 transitions. [2021-11-07 07:25:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:25:37,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:37,094 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:25:37,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2077353035, now seen corresponding path program 2 times [2021-11-07 07:25:37,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:37,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083701454] [2021-11-07 07:25:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:37,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:37,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:37,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083701454] [2021-11-07 07:25:37,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083701454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:37,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:37,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:37,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927029311] [2021-11-07 07:25:37,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:37,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:37,179 INFO L87 Difference]: Start difference. First operand 37933 states and 68302 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:25:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:39,951 INFO L93 Difference]: Finished difference Result 75777 states and 136454 transitions. [2021-11-07 07:25:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:25:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 07:25:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:40,036 INFO L225 Difference]: With dead ends: 75777 [2021-11-07 07:25:40,036 INFO L226 Difference]: Without dead ends: 38103 [2021-11-07 07:25:40,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38103 states. [2021-11-07 07:25:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38103 to 37933. [2021-11-07 07:25:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37933 states, 37931 states have (on average 1.797316179378345) internal successors, (68174), 37932 states have internal predecessors, (68174), 0 states have call successors, (0), 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 07:25:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68174 transitions. [2021-11-07 07:25:42,490 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68174 transitions. Word has length 75 [2021-11-07 07:25:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:42,490 INFO L470 AbstractCegarLoop]: Abstraction has 37933 states and 68174 transitions. [2021-11-07 07:25:42,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:25:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68174 transitions. [2021-11-07 07:25:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:25:42,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:42,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:42,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:25:42,504 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash 986453986, now seen corresponding path program 1 times [2021-11-07 07:25:42,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:42,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880645788] [2021-11-07 07:25:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:42,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:42,574 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 07:25:42,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:42,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880645788] [2021-11-07 07:25:42,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880645788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:42,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:42,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:42,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689733772] [2021-11-07 07:25:42,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:42,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:42,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:42,577 INFO L87 Difference]: Start difference. First operand 37933 states and 68174 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:25:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:46,340 INFO L93 Difference]: Finished difference Result 105387 states and 189136 transitions. [2021-11-07 07:25:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 07:25:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:46,474 INFO L225 Difference]: With dead ends: 105387 [2021-11-07 07:25:46,474 INFO L226 Difference]: Without dead ends: 67673 [2021-11-07 07:25:46,505 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 07:25:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67673 states. [2021-11-07 07:25:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67673 to 67503. [2021-11-07 07:25:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67503 states, 67501 states have (on average 1.7893512688700908) internal successors, (120783), 67502 states have internal predecessors, (120783), 0 states have call successors, (0), 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 07:25:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67503 states to 67503 states and 120783 transitions. [2021-11-07 07:25:50,429 INFO L78 Accepts]: Start accepts. Automaton has 67503 states and 120783 transitions. Word has length 75 [2021-11-07 07:25:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:50,429 INFO L470 AbstractCegarLoop]: Abstraction has 67503 states and 120783 transitions. [2021-11-07 07:25:50,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:25:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67503 states and 120783 transitions. [2021-11-07 07:25:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:25:50,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:50,441 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:50,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:25:50,441 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 195570043, now seen corresponding path program 1 times [2021-11-07 07:25:50,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:50,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449971854] [2021-11-07 07:25:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:50,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:25:50,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:50,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449971854] [2021-11-07 07:25:50,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449971854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:50,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:50,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:25:50,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330141041] [2021-11-07 07:25:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:25:50,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:25:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:50,536 INFO L87 Difference]: Start difference. First operand 67503 states and 120783 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:25:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:55,966 INFO L93 Difference]: Finished difference Result 135302 states and 242063 transitions. [2021-11-07 07:25:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:25:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 76 [2021-11-07 07:25:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:56,242 INFO L225 Difference]: With dead ends: 135302 [2021-11-07 07:25:56,242 INFO L226 Difference]: Without dead ends: 135150 [2021-11-07 07:25:56,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:25:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135150 states. [2021-11-07 07:26:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135150 to 134925. [2021-11-07 07:26:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134925 states, 134923 states have (on average 1.789405809239344) internal successors, (241432), 134924 states have internal predecessors, (241432), 0 states have call successors, (0), 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 07:26:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134925 states to 134925 states and 241432 transitions. [2021-11-07 07:26:03,787 INFO L78 Accepts]: Start accepts. Automaton has 134925 states and 241432 transitions. Word has length 76 [2021-11-07 07:26:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:03,787 INFO L470 AbstractCegarLoop]: Abstraction has 134925 states and 241432 transitions. [2021-11-07 07:26:03,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:26:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 134925 states and 241432 transitions. [2021-11-07 07:26:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:26:03,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:03,813 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:26:03,814 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -636359826, now seen corresponding path program 1 times [2021-11-07 07:26:03,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:03,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763692412] [2021-11-07 07:26:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:03,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:26:03,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:03,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763692412] [2021-11-07 07:26:03,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763692412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:03,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:03,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:26:03,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93980187] [2021-11-07 07:26:03,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:26:03,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:26:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:26:03,902 INFO L87 Difference]: Start difference. First operand 134925 states and 241432 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)