./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G --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 39b8a4ae0f070887d4af4fec410b03e79c801778085245d1dd791c56546c3332 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:13:19,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:13:19,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:13:19,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:13:19,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:13:19,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:13:19,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:13:19,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:13:19,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:13:19,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:13:19,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:13:19,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:13:19,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:13:19,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:13:19,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:13:19,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:13:19,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:13:19,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:13:19,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:13:19,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:13:19,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:13:19,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:13:19,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:13:19,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:13:19,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:13:19,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:13:19,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:13:19,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:13:19,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:13:19,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:13:19,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:13:19,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:13:19,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:13:19,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:13:19,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:13:19,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:13:19,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:13:19,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:13:19,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:13:19,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:13:19,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:13:19,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:13:19,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:13:19,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:13:19,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:13:19,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:13:19,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:13:19,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:13:19,914 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:13:19,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:13:19,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:13:19,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:13:19,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:13:19,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:13:19,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:13:19,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:13:19,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:13:19,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:13:19,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:13:19,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:13:19,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:13:19,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:13:19,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:13:19,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:13:19,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:13:19,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:13:19,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:13:19,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:13:19,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:13:19,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:13:19,921 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:13:19,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:13:19,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:13:19,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:13:19,924 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_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b8a4ae0f070887d4af4fec410b03e79c801778085245d1dd791c56546c3332 [2021-11-23 14:13:20,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:13:20,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:13:20,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:13:20,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:13:20,300 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:13:20,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2021-11-23 14:13:20,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/data/be4bafe49/28158828d74440208232109cee156873/FLAGf2872852f [2021-11-23 14:13:21,553 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:13:21,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2021-11-23 14:13:21,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/data/be4bafe49/28158828d74440208232109cee156873/FLAGf2872852f [2021-11-23 14:13:21,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/data/be4bafe49/28158828d74440208232109cee156873 [2021-11-23 14:13:21,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:13:21,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:13:21,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:13:21,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:13:21,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:13:21,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:21" (1/1) ... [2021-11-23 14:13:21,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2637c0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:21, skipping insertion in model container [2021-11-23 14:13:21,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:21" (1/1) ... [2021-11-23 14:13:21,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:13:22,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:13:22,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/sv-benchmarks/c/eca-rers2012/Problem13_label03.c[5036,5049] [2021-11-23 14:13:24,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:13:24,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:13:24,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/sv-benchmarks/c/eca-rers2012/Problem13_label03.c[5036,5049] [2021-11-23 14:13:25,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:13:25,313 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:13:25,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25 WrapperNode [2021-11-23 14:13:25,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:13:25,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:13:25,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:13:25,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:13:25,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:25,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:26,240 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 14:13:26,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:13:26,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:13:26,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:13:26,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:13:26,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:26,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:26,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:26,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:27,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:27,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:27,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:27,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:13:27,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:13:27,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:13:27,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:13:27,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 14:13:27,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:13:27,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:27,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:13:27,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:13:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:13:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:13:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:13:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:13:27,608 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:13:27,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:13:34,915 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:13:34,939 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:13:34,940 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:13:34,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:34 BoogieIcfgContainer [2021-11-23 14:13:34,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:13:34,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:13:34,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:13:34,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:13:34,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:13:21" (1/3) ... [2021-11-23 14:13:34,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655304ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:34, skipping insertion in model container [2021-11-23 14:13:34,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (2/3) ... [2021-11-23 14:13:34,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655304ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:34, skipping insertion in model container [2021-11-23 14:13:34,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:34" (3/3) ... [2021-11-23 14:13:34,956 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2021-11-23 14:13:34,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:13:34,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:13:35,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:13:35,042 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 [2021-11-23 14:13:35,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 14:13:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 14:13:35,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:35,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:35,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2021-11-23 14:13:35,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555281660] [2021-11-23 14:13:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:35,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:35,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:35,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555281660] [2021-11-23 14:13:35,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555281660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:13:35,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:13:35,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:13:35,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653725730] [2021-11-23 14:13:35,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:13:35,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:13:35,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:13:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:35,551 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:43,223 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-11-23 14:13:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:13:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 14:13:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:43,277 INFO L225 Difference]: With dead ends: 3160 [2021-11-23 14:13:43,278 INFO L226 Difference]: Without dead ends: 1983 [2021-11-23 14:13:43,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:43,298 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1069 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:43,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 14:13:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-11-23 14:13:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-11-23 14:13:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-11-23 14:13:43,591 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 34 [2021-11-23 14:13:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:43,592 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-11-23 14:13:43,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-11-23 14:13:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 14:13:43,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:43,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:13:43,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:13:43,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1620758014, now seen corresponding path program 1 times [2021-11-23 14:13:43,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:43,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142014556] [2021-11-23 14:13:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:43,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:43,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142014556] [2021-11-23 14:13:43,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142014556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:13:43,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:13:43,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:13:43,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474009830] [2021-11-23 14:13:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:13:43,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:13:43,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:13:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:43,883 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:49,781 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-11-23 14:13:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:13:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-23 14:13:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:49,815 INFO L225 Difference]: With dead ends: 5456 [2021-11-23 14:13:49,815 INFO L226 Difference]: Without dead ends: 3528 [2021-11-23 14:13:49,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:49,829 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:49,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 14:13:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-23 14:13:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-11-23 14:13:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-11-23 14:13:49,985 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 99 [2021-11-23 14:13:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:49,989 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-11-23 14:13:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-11-23 14:13:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 14:13:50,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:50,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:13:50,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:13:50,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1762154579, now seen corresponding path program 1 times [2021-11-23 14:13:50,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:50,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196868931] [2021-11-23 14:13:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:50,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:50,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196868931] [2021-11-23 14:13:50,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196868931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:13:50,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:13:50,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:13:50,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499639961] [2021-11-23 14:13:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:13:50,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:13:50,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:13:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:50,241 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:55,448 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2021-11-23 14:13:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:13:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-23 14:13:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:55,501 INFO L225 Difference]: With dead ends: 10232 [2021-11-23 14:13:55,502 INFO L226 Difference]: Without dead ends: 6708 [2021-11-23 14:13:55,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:55,510 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:55,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 14:13:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-11-23 14:13:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2021-11-23 14:13:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-11-23 14:13:55,723 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 105 [2021-11-23 14:13:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:55,724 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-11-23 14:13:55,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-11-23 14:13:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 14:13:55,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:55,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:55,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:13:55,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 684107752, now seen corresponding path program 1 times [2021-11-23 14:13:55,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:55,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129831467] [2021-11-23 14:13:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:55,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:55,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129831467] [2021-11-23 14:13:55,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129831467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:13:55,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:13:55,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:13:55,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857748725] [2021-11-23 14:13:55,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:13:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:13:55,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:13:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:13:55,930 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:01,381 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-11-23 14:14:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 14:14:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:01,454 INFO L225 Difference]: With dead ends: 17443 [2021-11-23 14:14:01,454 INFO L226 Difference]: Without dead ends: 10745 [2021-11-23 14:14:01,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:01,468 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:01,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 14:14:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-11-23 14:14:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-11-23 14:14:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-11-23 14:14:01,763 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 135 [2021-11-23 14:14:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:01,765 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-11-23 14:14:01,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-11-23 14:14:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 14:14:01,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:01,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:01,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:14:01,772 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 607750639, now seen corresponding path program 1 times [2021-11-23 14:14:01,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:01,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567056987] [2021-11-23 14:14:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:01,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567056987] [2021-11-23 14:14:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567056987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:01,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:14:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128512675] [2021-11-23 14:14:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:01,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:01,980 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:06,311 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2021-11-23 14:14:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-23 14:14:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:06,371 INFO L225 Difference]: With dead ends: 20549 [2021-11-23 14:14:06,372 INFO L226 Difference]: Without dead ends: 10669 [2021-11-23 14:14:06,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:06,385 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:06,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 14:14:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-11-23 14:14:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2021-11-23 14:14:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2021-11-23 14:14:06,622 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 145 [2021-11-23 14:14:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2021-11-23 14:14:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2021-11-23 14:14:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 14:14:06,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:06,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:06,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:14:06,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1291315781, now seen corresponding path program 1 times [2021-11-23 14:14:06,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:06,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353697852] [2021-11-23 14:14:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:06,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 14:14:06,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:06,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353697852] [2021-11-23 14:14:06,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353697852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:06,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:06,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:14:06,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991143283] [2021-11-23 14:14:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:06,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:06,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:06,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:06,747 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:11,367 INFO L93 Difference]: Finished difference Result 30031 states and 41217 transitions. [2021-11-23 14:14:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 159 [2021-11-23 14:14:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:11,414 INFO L225 Difference]: With dead ends: 30031 [2021-11-23 14:14:11,415 INFO L226 Difference]: Without dead ends: 20151 [2021-11-23 14:14:11,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:11,433 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 736 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:11,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1221 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 14:14:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-11-23 14:14:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 19337. [2021-11-23 14:14:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 1.24244931733554) internal successors, (24024), 19336 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 24024 transitions. [2021-11-23 14:14:11,824 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 24024 transitions. Word has length 159 [2021-11-23 14:14:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 24024 transitions. [2021-11-23 14:14:11,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 24024 transitions. [2021-11-23 14:14:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 14:14:11,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:11,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:14:11,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:14:11,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2086069409, now seen corresponding path program 1 times [2021-11-23 14:14:11,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:11,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25938349] [2021-11-23 14:14:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:11,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 14:14:12,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25938349] [2021-11-23 14:14:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25938349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:12,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:12,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:14:12,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212257033] [2021-11-23 14:14:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:12,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:12,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:12,036 INFO L87 Difference]: Start difference. First operand 19337 states and 24024 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:16,697 INFO L93 Difference]: Finished difference Result 44989 states and 55628 transitions. [2021-11-23 14:14:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 246 [2021-11-23 14:14:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:16,757 INFO L225 Difference]: With dead ends: 44989 [2021-11-23 14:14:16,758 INFO L226 Difference]: Without dead ends: 26441 [2021-11-23 14:14:16,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:16,784 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:16,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1213 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 14:14:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2021-11-23 14:14:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2021-11-23 14:14:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.200582605076987) internal successors, (31735), 26433 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31735 transitions. [2021-11-23 14:14:17,236 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31735 transitions. Word has length 246 [2021-11-23 14:14:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:17,237 INFO L470 AbstractCegarLoop]: Abstraction has 26434 states and 31735 transitions. [2021-11-23 14:14:17,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31735 transitions. [2021-11-23 14:14:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-23 14:14:17,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:17,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:14:17,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:14:17,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1890725157, now seen corresponding path program 1 times [2021-11-23 14:14:17,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:17,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125468715] [2021-11-23 14:14:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:17,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:17,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125468715] [2021-11-23 14:14:17,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125468715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:17,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:17,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:14:17,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432926890] [2021-11-23 14:14:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:17,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:17,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:17,474 INFO L87 Difference]: Start difference. First operand 26434 states and 31735 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:22,685 INFO L93 Difference]: Finished difference Result 72535 states and 87971 transitions. [2021-11-23 14:14:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-11-23 14:14:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:22,745 INFO L225 Difference]: With dead ends: 72535 [2021-11-23 14:14:22,746 INFO L226 Difference]: Without dead ends: 46103 [2021-11-23 14:14:22,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:22,766 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 841 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:22,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 14:14:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2021-11-23 14:14:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 43733. [2021-11-23 14:14:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43733 states, 43732 states have (on average 1.1691210097868838) internal successors, (51128), 43732 states have internal predecessors, (51128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43733 states to 43733 states and 51128 transitions. [2021-11-23 14:14:23,882 INFO L78 Accepts]: Start accepts. Automaton has 43733 states and 51128 transitions. Word has length 248 [2021-11-23 14:14:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:23,883 INFO L470 AbstractCegarLoop]: Abstraction has 43733 states and 51128 transitions. [2021-11-23 14:14:23,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43733 states and 51128 transitions. [2021-11-23 14:14:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-23 14:14:23,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:23,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:14:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:14:23,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -763381361, now seen corresponding path program 1 times [2021-11-23 14:14:23,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541405284] [2021-11-23 14:14:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:23,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:24,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:24,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541405284] [2021-11-23 14:14:24,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541405284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:24,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:24,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:14:24,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044891732] [2021-11-23 14:14:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:24,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:24,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:24,070 INFO L87 Difference]: Start difference. First operand 43733 states and 51128 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:29,416 INFO L93 Difference]: Finished difference Result 106364 states and 126458 transitions. [2021-11-23 14:14:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-11-23 14:14:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:29,513 INFO L225 Difference]: With dead ends: 106364 [2021-11-23 14:14:29,513 INFO L226 Difference]: Without dead ends: 63420 [2021-11-23 14:14:29,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:29,539 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 825 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:29,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 928 Invalid, 3285 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 14:14:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63420 states. [2021-11-23 14:14:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63420 to 61835. [2021-11-23 14:14:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61835 states, 61834 states have (on average 1.159378335543552) internal successors, (71689), 61834 states have internal predecessors, (71689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61835 states to 61835 states and 71689 transitions. [2021-11-23 14:14:30,881 INFO L78 Accepts]: Start accepts. Automaton has 61835 states and 71689 transitions. Word has length 261 [2021-11-23 14:14:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:30,882 INFO L470 AbstractCegarLoop]: Abstraction has 61835 states and 71689 transitions. [2021-11-23 14:14:30,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 61835 states and 71689 transitions. [2021-11-23 14:14:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-23 14:14:30,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:30,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:14:30,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:14:30,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1249469047, now seen corresponding path program 1 times [2021-11-23 14:14:30,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999333089] [2021-11-23 14:14:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 63 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:31,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:31,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999333089] [2021-11-23 14:14:31,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999333089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:31,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060238490] [2021-11-23 14:14:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:31,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:31,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:31,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:14:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:14:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 14:14:32,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:14:32,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060238490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:32,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:14:32,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-23 14:14:32,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444595720] [2021-11-23 14:14:32,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:32,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:32,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:14:32,702 INFO L87 Difference]: Start difference. First operand 61835 states and 71689 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:37,438 INFO L93 Difference]: Finished difference Result 122870 states and 142574 transitions. [2021-11-23 14:14:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 275 [2021-11-23 14:14:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:37,517 INFO L225 Difference]: With dead ends: 122870 [2021-11-23 14:14:37,517 INFO L226 Difference]: Without dead ends: 61824 [2021-11-23 14:14:37,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:14:37,711 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 1106 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:37,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 823 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 14:14:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61824 states. [2021-11-23 14:14:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61824 to 61034. [2021-11-23 14:14:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61034 states, 61033 states have (on average 1.118509658709223) internal successors, (68266), 61033 states have internal predecessors, (68266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61034 states to 61034 states and 68266 transitions. [2021-11-23 14:14:38,785 INFO L78 Accepts]: Start accepts. Automaton has 61034 states and 68266 transitions. Word has length 275 [2021-11-23 14:14:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:38,787 INFO L470 AbstractCegarLoop]: Abstraction has 61034 states and 68266 transitions. [2021-11-23 14:14:38,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61034 states and 68266 transitions. [2021-11-23 14:14:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-23 14:14:38,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:38,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:38,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:39,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:39,023 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1197814517, now seen corresponding path program 1 times [2021-11-23 14:14:39,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224202920] [2021-11-23 14:14:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:39,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:14:39,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:39,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224202920] [2021-11-23 14:14:39,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224202920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:39,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:39,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:14:39,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433102783] [2021-11-23 14:14:39,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:39,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:14:39,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:14:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:14:39,198 INFO L87 Difference]: Start difference. First operand 61034 states and 68266 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:49,729 INFO L93 Difference]: Finished difference Result 160052 states and 179870 transitions. [2021-11-23 14:14:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:14:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 317 [2021-11-23 14:14:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:49,877 INFO L225 Difference]: With dead ends: 160052 [2021-11-23 14:14:49,877 INFO L226 Difference]: Without dead ends: 99807 [2021-11-23 14:14:49,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:14:49,907 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1704 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 6725 mSolverCounterSat, 1014 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 7739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 6725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:49,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 874 Invalid, 7739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1014 Valid, 6725 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 14:14:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99807 states. [2021-11-23 14:14:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99807 to 76789. [2021-11-23 14:14:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76789 states, 76788 states have (on average 1.1087930405792572) internal successors, (85142), 76788 states have internal predecessors, (85142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76789 states to 76789 states and 85142 transitions. [2021-11-23 14:14:51,274 INFO L78 Accepts]: Start accepts. Automaton has 76789 states and 85142 transitions. Word has length 317 [2021-11-23 14:14:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 76789 states and 85142 transitions. [2021-11-23 14:14:51,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76789 states and 85142 transitions. [2021-11-23 14:14:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-23 14:14:51,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:51,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:51,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:14:51,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1005452138, now seen corresponding path program 1 times [2021-11-23 14:14:51,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780246138] [2021-11-23 14:14:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:51,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-23 14:14:51,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780246138] [2021-11-23 14:14:51,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780246138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:14:51,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:14:51,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:14:51,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057816278] [2021-11-23 14:14:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:14:51,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:14:51,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:14:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:51,500 INFO L87 Difference]: Start difference. First operand 76789 states and 85142 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:58,092 INFO L93 Difference]: Finished difference Result 178154 states and 199459 transitions. [2021-11-23 14:14:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:14:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2021-11-23 14:14:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:58,249 INFO L225 Difference]: With dead ends: 178154 [2021-11-23 14:14:58,250 INFO L226 Difference]: Without dead ends: 113971 [2021-11-23 14:14:58,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:14:58,280 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 997 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:58,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 704 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-23 14:14:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113971 states. [2021-11-23 14:14:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113971 to 92587. [2021-11-23 14:14:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92587 states, 92586 states have (on average 1.1142505346380662) internal successors, (103164), 92586 states have internal predecessors, (103164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92587 states to 92587 states and 103164 transitions. [2021-11-23 14:14:59,907 INFO L78 Accepts]: Start accepts. Automaton has 92587 states and 103164 transitions. Word has length 363 [2021-11-23 14:14:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:59,908 INFO L470 AbstractCegarLoop]: Abstraction has 92587 states and 103164 transitions. [2021-11-23 14:14:59,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 92587 states and 103164 transitions. [2021-11-23 14:14:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-23 14:14:59,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:59,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:59,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:14:59,921 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1527569753, now seen corresponding path program 1 times [2021-11-23 14:14:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172949933] [2021-11-23 14:14:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:59,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 286 proven. 113 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:15:00,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172949933] [2021-11-23 14:15:00,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172949933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525847871] [2021-11-23 14:15:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:00,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:00,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:00,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:15:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:15:01,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 14:15:01,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:15:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525847871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:01,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:15:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-23 14:15:01,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677389073] [2021-11-23 14:15:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:01,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:01,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:15:01,880 INFO L87 Difference]: Start difference. First operand 92587 states and 103164 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:06,572 INFO L93 Difference]: Finished difference Result 184383 states and 205533 transitions. [2021-11-23 14:15:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 389 [2021-11-23 14:15:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:06,684 INFO L225 Difference]: With dead ends: 184383 [2021-11-23 14:15:06,684 INFO L226 Difference]: Without dead ends: 92585 [2021-11-23 14:15:06,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:15:06,719 INFO L933 BasicCegarLoop]: 1343 mSDtfsCounter, 1084 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:06,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1422 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 14:15:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92585 states. [2021-11-23 14:15:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92585 to 92584. [2021-11-23 14:15:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92584 states, 92583 states have (on average 1.090588985018848) internal successors, (100970), 92583 states have internal predecessors, (100970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92584 states to 92584 states and 100970 transitions. [2021-11-23 14:15:08,323 INFO L78 Accepts]: Start accepts. Automaton has 92584 states and 100970 transitions. Word has length 389 [2021-11-23 14:15:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:08,324 INFO L470 AbstractCegarLoop]: Abstraction has 92584 states and 100970 transitions. [2021-11-23 14:15:08,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 92584 states and 100970 transitions. [2021-11-23 14:15:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-23 14:15:08,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:08,335 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:08,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:08,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 14:15:08,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash 421332255, now seen corresponding path program 1 times [2021-11-23 14:15:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938602075] [2021-11-23 14:15:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:08,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-23 14:15:08,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:08,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938602075] [2021-11-23 14:15:08,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938602075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:08,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:08,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:08,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601437292] [2021-11-23 14:15:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:08,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:08,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:08,782 INFO L87 Difference]: Start difference. First operand 92584 states and 100970 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:14,436 INFO L93 Difference]: Finished difference Result 214297 states and 235378 transitions. [2021-11-23 14:15:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 390 [2021-11-23 14:15:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:14,666 INFO L225 Difference]: With dead ends: 214297 [2021-11-23 14:15:14,666 INFO L226 Difference]: Without dead ends: 122502 [2021-11-23 14:15:15,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:15,117 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 890 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:15,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 893 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 14:15:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122502 states. [2021-11-23 14:15:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122502 to 120119. [2021-11-23 14:15:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120119 states, 120118 states have (on average 1.0939576083517875) internal successors, (131404), 120118 states have internal predecessors, (131404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120119 states to 120119 states and 131404 transitions. [2021-11-23 14:15:16,664 INFO L78 Accepts]: Start accepts. Automaton has 120119 states and 131404 transitions. Word has length 390 [2021-11-23 14:15:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:16,664 INFO L470 AbstractCegarLoop]: Abstraction has 120119 states and 131404 transitions. [2021-11-23 14:15:16,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 120119 states and 131404 transitions. [2021-11-23 14:15:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-23 14:15:16,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:16,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:16,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:15:16,678 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1432798242, now seen corresponding path program 1 times [2021-11-23 14:15:16,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328994945] [2021-11-23 14:15:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:16,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-23 14:15:16,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328994945] [2021-11-23 14:15:16,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328994945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:16,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:16,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:16,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878081046] [2021-11-23 14:15:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:16,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:16,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:16,905 INFO L87 Difference]: Start difference. First operand 120119 states and 131404 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:22,568 INFO L93 Difference]: Finished difference Result 241814 states and 264399 transitions. [2021-11-23 14:15:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 423 [2021-11-23 14:15:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:22,754 INFO L225 Difference]: With dead ends: 241814 [2021-11-23 14:15:22,754 INFO L226 Difference]: Without dead ends: 122484 [2021-11-23 14:15:22,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:22,809 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1005 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:22,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1471 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 14:15:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122484 states. [2021-11-23 14:15:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122484 to 120109. [2021-11-23 14:15:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120109 states, 120108 states have (on average 1.069246011922603) internal successors, (128425), 120108 states have internal predecessors, (128425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120109 states to 120109 states and 128425 transitions. [2021-11-23 14:15:24,622 INFO L78 Accepts]: Start accepts. Automaton has 120109 states and 128425 transitions. Word has length 423 [2021-11-23 14:15:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:24,622 INFO L470 AbstractCegarLoop]: Abstraction has 120109 states and 128425 transitions. [2021-11-23 14:15:24,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 120109 states and 128425 transitions. [2021-11-23 14:15:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-23 14:15:24,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:24,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 14:15:24,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:15:24,654 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1639587280, now seen corresponding path program 1 times [2021-11-23 14:15:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461100341] [2021-11-23 14:15:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 747 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 14:15:25,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:25,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461100341] [2021-11-23 14:15:25,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461100341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:25,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:25,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:25,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412542452] [2021-11-23 14:15:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:25,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:25,656 INFO L87 Difference]: Start difference. First operand 120109 states and 128425 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:31,001 INFO L93 Difference]: Finished difference Result 270927 states and 290662 transitions. [2021-11-23 14:15:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 568 [2021-11-23 14:15:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:31,187 INFO L225 Difference]: With dead ends: 270927 [2021-11-23 14:15:31,188 INFO L226 Difference]: Without dead ends: 149246 [2021-11-23 14:15:31,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:31,231 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 783 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:31,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1883 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 14:15:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149246 states. [2021-11-23 14:15:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149246 to 149226. [2021-11-23 14:15:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149226 states, 149225 states have (on average 1.061424024124644) internal successors, (158391), 149225 states have internal predecessors, (158391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149226 states to 149226 states and 158391 transitions. [2021-11-23 14:15:34,011 INFO L78 Accepts]: Start accepts. Automaton has 149226 states and 158391 transitions. Word has length 568 [2021-11-23 14:15:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:34,012 INFO L470 AbstractCegarLoop]: Abstraction has 149226 states and 158391 transitions. [2021-11-23 14:15:34,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 149226 states and 158391 transitions. [2021-11-23 14:15:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-11-23 14:15:34,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:34,037 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:34,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:15:34,038 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1688698911, now seen corresponding path program 1 times [2021-11-23 14:15:34,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128035839] [2021-11-23 14:15:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:34,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 944 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-23 14:15:34,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128035839] [2021-11-23 14:15:34,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128035839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:34,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:34,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:34,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418388269] [2021-11-23 14:15:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:34,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:34,336 INFO L87 Difference]: Start difference. First operand 149226 states and 158391 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:40,855 INFO L93 Difference]: Finished difference Result 337042 states and 359691 transitions. [2021-11-23 14:15:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 577 [2021-11-23 14:15:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:41,158 INFO L225 Difference]: With dead ends: 337042 [2021-11-23 14:15:41,158 INFO L226 Difference]: Without dead ends: 206713 [2021-11-23 14:15:41,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:41,231 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1022 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:41,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 632 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 14:15:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206713 states. [2021-11-23 14:15:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206713 to 206706. [2021-11-23 14:15:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206706 states, 206705 states have (on average 1.0615321351684768) internal successors, (219424), 206705 states have internal predecessors, (219424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206706 states to 206706 states and 219424 transitions. [2021-11-23 14:15:45,630 INFO L78 Accepts]: Start accepts. Automaton has 206706 states and 219424 transitions. Word has length 577 [2021-11-23 14:15:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 206706 states and 219424 transitions. [2021-11-23 14:15:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 206706 states and 219424 transitions. [2021-11-23 14:15:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-23 14:15:45,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:45,666 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:45,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:15:45,666 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1668119914, now seen corresponding path program 1 times [2021-11-23 14:15:45,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:45,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520724190] [2021-11-23 14:15:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:45,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 301 proven. 113 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:15:46,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:46,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520724190] [2021-11-23 14:15:46,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520724190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828592496] [2021-11-23 14:15:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:46,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:46,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:46,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96323fd1-8b2a-40ea-af86-bb1890031f24/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:15:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:15:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 14:15:47,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:15:47,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828592496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:47,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:15:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-23 14:15:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661678221] [2021-11-23 14:15:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:47,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:15:47,611 INFO L87 Difference]: Start difference. First operand 206706 states and 219424 transitions. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)