./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX --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 a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:36:56,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:36:56,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:36:56,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:36:56,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:36:56,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:36:56,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:36:56,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:36:56,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:36:56,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:36:56,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:36:56,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:36:56,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:36:56,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:36:56,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:36:56,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:36:56,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:36:56,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:36:56,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:36:56,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:36:56,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:36:56,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:36:56,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:36:56,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:36:56,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:36:56,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:36:56,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:36:56,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:36:56,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:36:56,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:36:56,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:36:56,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:36:56,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:36:56,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:36:56,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:36:56,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:36:56,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:36:56,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:36:56,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:36:56,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:36:56,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:36:56,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:36:56,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:36:56,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:36:56,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:36:56,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:36:56,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:36:56,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:36:56,989 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:36:56,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:36:56,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:36:56,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:36:56,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:36:56,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:36:56,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:36:56,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:36:56,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:36:56,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:36:56,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:36:56,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:56,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:36:56,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:36:56,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:36:56,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:36:56,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:36:56,993 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:36:56,993 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:36:56,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:36:56,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:36:56,994 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_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f [2021-11-09 09:36:57,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:36:57,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:36:57,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:36:57,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:36:57,353 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:36:57,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-09 09:36:57,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/data/61ee991b1/c67f2fd9f7f747acb2cf5ab264bba6ec/FLAGdebe50545 [2021-11-09 09:36:57,903 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:36:57,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-09 09:36:57,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/data/61ee991b1/c67f2fd9f7f747acb2cf5ab264bba6ec/FLAGdebe50545 [2021-11-09 09:36:58,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/data/61ee991b1/c67f2fd9f7f747acb2cf5ab264bba6ec [2021-11-09 09:36:58,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:36:58,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:36:58,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:58,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:36:58,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:36:58,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aea926b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58, skipping insertion in model container [2021-11-09 09:36:58,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:36:58,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:58,600 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2021-11-09 09:36:58,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:58,635 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:36:58,674 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2021-11-09 09:36:58,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:58,708 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:36:58,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58 WrapperNode [2021-11-09 09:36:58,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:58,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:36:58,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:36:58,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:36:58,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:36:58,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:36:58,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:36:58,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:36:58,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:36:58,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:36:58,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:36:58,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:36:58,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (1/1) ... [2021-11-09 09:36:58,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:58,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:58,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:36:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:36:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:36:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:36:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:36:58,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:36:59,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:36:59,510 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:36:59,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:59 BoogieIcfgContainer [2021-11-09 09:36:59,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:36:59,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:36:59,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:36:59,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:36:59,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:36:58" (1/3) ... [2021-11-09 09:36:59,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdcc557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:59, skipping insertion in model container [2021-11-09 09:36:59,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:58" (2/3) ... [2021-11-09 09:36:59,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdcc557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:59, skipping insertion in model container [2021-11-09 09:36:59,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:59" (3/3) ... [2021-11-09 09:36:59,530 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-09 09:36:59,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:36:59,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:36:59,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:36:59,615 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 [2021-11-09 09:36:59,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:36:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:36:59,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:59,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:59,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2021-11-09 09:36:59,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:59,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365902308] [2021-11-09 09:36:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:59,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:00,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:00,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365902308] [2021-11-09 09:37:00,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365902308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:00,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:00,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:00,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115767265] [2021-11-09 09:37:00,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:00,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:00,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,070 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 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 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:00,149 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2021-11-09 09:37:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:37:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:00,161 INFO L225 Difference]: With dead ends: 140 [2021-11-09 09:37:00,162 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 09:37:00,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 09:37:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-11-09 09:37:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2021-11-09 09:37:00,207 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2021-11-09 09:37:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:00,208 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2021-11-09 09:37:00,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2021-11-09 09:37:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:37:00,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:00,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:00,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:37:00,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:00,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2021-11-09 09:37:00,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:00,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318650375] [2021-11-09 09:37:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:00,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:00,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:00,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318650375] [2021-11-09 09:37:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318650375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:00,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:00,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:00,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128681995] [2021-11-09 09:37:00,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:00,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,334 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:00,384 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2021-11-09 09:37:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:37:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:00,396 INFO L225 Difference]: With dead ends: 213 [2021-11-09 09:37:00,398 INFO L226 Difference]: Without dead ends: 143 [2021-11-09 09:37:00,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-09 09:37:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-11-09 09:37:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2021-11-09 09:37:00,443 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2021-11-09 09:37:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:00,443 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2021-11-09 09:37:00,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2021-11-09 09:37:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:37:00,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:00,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:00,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:37:00,446 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2021-11-09 09:37:00,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:00,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233595631] [2021-11-09 09:37:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:00,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:00,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233595631] [2021-11-09 09:37:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233595631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:00,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:00,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:00,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968205365] [2021-11-09 09:37:00,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,611 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:00,671 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2021-11-09 09:37:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:37:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:00,675 INFO L225 Difference]: With dead ends: 353 [2021-11-09 09:37:00,675 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 09:37:00,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 09:37:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-11-09 09:37:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5263157894736843) internal successors, (348), 228 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2021-11-09 09:37:00,729 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2021-11-09 09:37:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:00,729 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2021-11-09 09:37:00,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2021-11-09 09:37:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:37:00,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:00,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:37:00,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:00,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2021-11-09 09:37:00,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:00,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849345503] [2021-11-09 09:37:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:00,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:00,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:00,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849345503] [2021-11-09 09:37:00,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849345503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:00,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:00,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608828636] [2021-11-09 09:37:00,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:00,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:00,900 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:01,210 INFO L93 Difference]: Finished difference Result 1489 states and 2322 transitions. [2021-11-09 09:37:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:37:01,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:37:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:01,228 INFO L225 Difference]: With dead ends: 1489 [2021-11-09 09:37:01,229 INFO L226 Difference]: Without dead ends: 1279 [2021-11-09 09:37:01,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-11-09 09:37:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 437. [2021-11-09 09:37:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5137614678899083) internal successors, (660), 436 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 660 transitions. [2021-11-09 09:37:01,330 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 660 transitions. Word has length 39 [2021-11-09 09:37:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:01,331 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 660 transitions. [2021-11-09 09:37:01,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 660 transitions. [2021-11-09 09:37:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:37:01,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:01,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:01,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:37:01,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1891215654, now seen corresponding path program 1 times [2021-11-09 09:37:01,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:01,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95634446] [2021-11-09 09:37:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:01,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:01,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:01,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95634446] [2021-11-09 09:37:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95634446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:01,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:01,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:01,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551317933] [2021-11-09 09:37:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:01,417 INFO L87 Difference]: Start difference. First operand 437 states and 660 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:01,479 INFO L93 Difference]: Finished difference Result 1055 states and 1604 transitions. [2021-11-09 09:37:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-09 09:37:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:01,484 INFO L225 Difference]: With dead ends: 1055 [2021-11-09 09:37:01,485 INFO L226 Difference]: Without dead ends: 637 [2021-11-09 09:37:01,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-09 09:37:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-11-09 09:37:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.498422712933754) internal successors, (950), 634 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 950 transitions. [2021-11-09 09:37:01,551 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 950 transitions. Word has length 41 [2021-11-09 09:37:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:01,551 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 950 transitions. [2021-11-09 09:37:01,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 950 transitions. [2021-11-09 09:37:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:37:01,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:01,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:37:01,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1870212999, now seen corresponding path program 1 times [2021-11-09 09:37:01,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:01,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493702904] [2021-11-09 09:37:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:01,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:01,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:01,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493702904] [2021-11-09 09:37:01,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493702904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:01,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:01,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:01,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344756936] [2021-11-09 09:37:01,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:01,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:01,715 INFO L87 Difference]: Start difference. First operand 635 states and 950 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:01,823 INFO L93 Difference]: Finished difference Result 1251 states and 1880 transitions. [2021-11-09 09:37:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-09 09:37:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:01,829 INFO L225 Difference]: With dead ends: 1251 [2021-11-09 09:37:01,829 INFO L226 Difference]: Without dead ends: 637 [2021-11-09 09:37:01,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:37:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-09 09:37:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-11-09 09:37:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4794952681388012) internal successors, (938), 634 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2021-11-09 09:37:01,896 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2021-11-09 09:37:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:01,897 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2021-11-09 09:37:01,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2021-11-09 09:37:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:37:01,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:01,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:01,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:37:01,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2143937547, now seen corresponding path program 1 times [2021-11-09 09:37:01,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:01,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789608949] [2021-11-09 09:37:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:01,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:01,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:01,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789608949] [2021-11-09 09:37:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789608949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:01,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:01,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:01,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317852993] [2021-11-09 09:37:01,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:37:01,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:37:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:37:02,000 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:02,227 INFO L93 Difference]: Finished difference Result 1851 states and 2748 transitions. [2021-11-09 09:37:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-09 09:37:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:02,236 INFO L225 Difference]: With dead ends: 1851 [2021-11-09 09:37:02,237 INFO L226 Difference]: Without dead ends: 1237 [2021-11-09 09:37:02,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-11-09 09:37:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1235. [2021-11-09 09:37:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 1.473257698541329) internal successors, (1818), 1234 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1818 transitions. [2021-11-09 09:37:02,367 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1818 transitions. Word has length 42 [2021-11-09 09:37:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:02,368 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1818 transitions. [2021-11-09 09:37:02,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1818 transitions. [2021-11-09 09:37:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:37:02,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:02,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:02,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:37:02,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2021-11-09 09:37:02,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:02,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649149702] [2021-11-09 09:37:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:02,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:02,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:02,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649149702] [2021-11-09 09:37:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649149702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:02,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:02,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:02,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866235325] [2021-11-09 09:37:02,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:02,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:02,497 INFO L87 Difference]: Start difference. First operand 1235 states and 1818 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:02,728 INFO L93 Difference]: Finished difference Result 2221 states and 3248 transitions. [2021-11-09 09:37:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:37:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-09 09:37:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:02,744 INFO L225 Difference]: With dead ends: 2221 [2021-11-09 09:37:02,744 INFO L226 Difference]: Without dead ends: 2219 [2021-11-09 09:37:02,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:37:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-11-09 09:37:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1299. [2021-11-09 09:37:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 1.4437596302003082) internal successors, (1874), 1298 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1874 transitions. [2021-11-09 09:37:02,928 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1874 transitions. Word has length 42 [2021-11-09 09:37:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:02,930 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 1874 transitions. [2021-11-09 09:37:02,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1874 transitions. [2021-11-09 09:37:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:37:02,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:02,934 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:37:02,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:37:02,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2021-11-09 09:37:02,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:02,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206223247] [2021-11-09 09:37:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:02,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:37:03,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:03,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206223247] [2021-11-09 09:37:03,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206223247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:03,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:03,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:03,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738089367] [2021-11-09 09:37:03,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:03,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:03,038 INFO L87 Difference]: Start difference. First operand 1299 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:03,492 INFO L93 Difference]: Finished difference Result 5389 states and 7780 transitions. [2021-11-09 09:37:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 09:37:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:03,517 INFO L225 Difference]: With dead ends: 5389 [2021-11-09 09:37:03,517 INFO L226 Difference]: Without dead ends: 4111 [2021-11-09 09:37:03,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-11-09 09:37:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 2575. [2021-11-09 09:37:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 1.4382284382284383) internal successors, (3702), 2574 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3702 transitions. [2021-11-09 09:37:03,809 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3702 transitions. Word has length 60 [2021-11-09 09:37:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:03,809 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 3702 transitions. [2021-11-09 09:37:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3702 transitions. [2021-11-09 09:37:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:37:03,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:03,811 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:37:03,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:37:03,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2021-11-09 09:37:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:03,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879330561] [2021-11-09 09:37:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:03,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:37:03,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:03,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879330561] [2021-11-09 09:37:03,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879330561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:03,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:03,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:03,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593885893] [2021-11-09 09:37:03,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:03,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:03,932 INFO L87 Difference]: Start difference. First operand 2575 states and 3702 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:04,474 INFO L93 Difference]: Finished difference Result 6665 states and 9608 transitions. [2021-11-09 09:37:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 09:37:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:04,508 INFO L225 Difference]: With dead ends: 6665 [2021-11-09 09:37:04,509 INFO L226 Difference]: Without dead ends: 5387 [2021-11-09 09:37:04,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-11-09 09:37:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4493. [2021-11-09 09:37:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 1.4300979519145147) internal successors, (6424), 4492 states have internal predecessors, (6424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 6424 transitions. [2021-11-09 09:37:05,039 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 6424 transitions. Word has length 60 [2021-11-09 09:37:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:05,039 INFO L470 AbstractCegarLoop]: Abstraction has 4493 states and 6424 transitions. [2021-11-09 09:37:05,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 6424 transitions. [2021-11-09 09:37:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:37:05,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:05,042 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:37:05,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:37:05,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2021-11-09 09:37:05,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:05,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461684112] [2021-11-09 09:37:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:05,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:37:05,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:05,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461684112] [2021-11-09 09:37:05,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461684112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:05,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:05,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:05,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730358168] [2021-11-09 09:37:05,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:05,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:05,125 INFO L87 Difference]: Start difference. First operand 4493 states and 6424 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:05,666 INFO L93 Difference]: Finished difference Result 7165 states and 10340 transitions. [2021-11-09 09:37:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:05,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 09:37:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:05,701 INFO L225 Difference]: With dead ends: 7165 [2021-11-09 09:37:05,701 INFO L226 Difference]: Without dead ends: 6275 [2021-11-09 09:37:05,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2021-11-09 09:37:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 5381. [2021-11-09 09:37:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 5380 states have (on average 1.4334572490706319) internal successors, (7712), 5380 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 7712 transitions. [2021-11-09 09:37:06,257 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 7712 transitions. Word has length 60 [2021-11-09 09:37:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:06,257 INFO L470 AbstractCegarLoop]: Abstraction has 5381 states and 7712 transitions. [2021-11-09 09:37:06,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 7712 transitions. [2021-11-09 09:37:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:37:06,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:06,259 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:37:06,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:37:06,260 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2021-11-09 09:37:06,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:06,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766824596] [2021-11-09 09:37:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:06,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:37:06,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:06,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766824596] [2021-11-09 09:37:06,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766824596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:06,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101177247] [2021-11-09 09:37:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:06,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:06,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:06,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:37:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:37:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:37:06,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101177247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:06,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:06,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-09 09:37:06,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622607445] [2021-11-09 09:37:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:37:06,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:37:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:06,777 INFO L87 Difference]: Start difference. First operand 5381 states and 7712 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:07,810 INFO L93 Difference]: Finished difference Result 12794 states and 18443 transitions. [2021-11-09 09:37:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:07,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 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 61 [2021-11-09 09:37:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:07,852 INFO L225 Difference]: With dead ends: 12794 [2021-11-09 09:37:07,852 INFO L226 Difference]: Without dead ends: 8796 [2021-11-09 09:37:07,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8796 states. [2021-11-09 09:37:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8796 to 8699. [2021-11-09 09:37:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8699 states, 8698 states have (on average 1.4148080018395033) internal successors, (12306), 8698 states have internal predecessors, (12306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8699 states to 8699 states and 12306 transitions. [2021-11-09 09:37:08,639 INFO L78 Accepts]: Start accepts. Automaton has 8699 states and 12306 transitions. Word has length 61 [2021-11-09 09:37:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:08,640 INFO L470 AbstractCegarLoop]: Abstraction has 8699 states and 12306 transitions. [2021-11-09 09:37:08,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 8699 states and 12306 transitions. [2021-11-09 09:37:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 09:37:08,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:08,642 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:08,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 09:37:08,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:37:08,860 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1709414990, now seen corresponding path program 1 times [2021-11-09 09:37:08,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:08,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386533114] [2021-11-09 09:37:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:08,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:09,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:09,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386533114] [2021-11-09 09:37:09,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386533114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:09,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234430341] [2021-11-09 09:37:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:09,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:09,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:09,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:09,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:37:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:09,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234430341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:11,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:11,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-11-09 09:37:11,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895697528] [2021-11-09 09:37:11,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:11,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:11,696 INFO L87 Difference]: Start difference. First operand 8699 states and 12306 transitions. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:43,877 INFO L93 Difference]: Finished difference Result 245742 states and 336666 transitions. [2021-11-09 09:38:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2021-11-09 09:38:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 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 62 [2021-11-09 09:38:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:44,880 INFO L225 Difference]: With dead ends: 245742 [2021-11-09 09:38:44,880 INFO L226 Difference]: Without dead ends: 237064 [2021-11-09 09:38:45,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63350 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=16385, Invalid=109285, Unknown=0, NotChecked=0, Total=125670 [2021-11-09 09:38:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237064 states. [2021-11-09 09:38:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237064 to 57275. [2021-11-09 09:38:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57275 states, 57274 states have (on average 1.3926388937388694) internal successors, (79762), 57274 states have internal predecessors, (79762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57275 states to 57275 states and 79762 transitions. [2021-11-09 09:38:55,911 INFO L78 Accepts]: Start accepts. Automaton has 57275 states and 79762 transitions. Word has length 62 [2021-11-09 09:38:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:55,911 INFO L470 AbstractCegarLoop]: Abstraction has 57275 states and 79762 transitions. [2021-11-09 09:38:55,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57275 states and 79762 transitions. [2021-11-09 09:38:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 09:38:55,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:55,914 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:55,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:56,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:38:56,129 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1553737534, now seen corresponding path program 1 times [2021-11-09 09:38:56,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:56,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984163252] [2021-11-09 09:38:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:56,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:56,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984163252] [2021-11-09 09:38:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984163252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636594488] [2021-11-09 09:38:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:56,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:56,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:56,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa6c8ae-9635-4174-8ed3-02959a2bc4f5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:38:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:38:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636594488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:57,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:38:57,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729299681] [2021-11-09 09:38:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:38:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:38:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:38:57,782 INFO L87 Difference]: Start difference. First operand 57275 states and 79762 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)