./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0 --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 b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:15:08,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:15:08,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:15:08,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:15:08,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:15:08,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:15:08,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:15:08,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:15:08,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:15:08,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:15:08,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:15:08,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:15:08,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:15:08,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:15:08,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:15:08,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:15:08,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:15:08,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:15:08,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:15:08,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:15:08,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:15:08,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:15:08,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:15:08,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:15:08,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:15:08,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:15:08,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:15:08,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:15:08,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:15:08,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:15:08,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:15:08,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:15:08,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:15:08,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:15:08,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:15:08,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:15:08,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:15:08,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:15:08,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:15:08,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:15:08,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:15:08,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:15:08,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:15:08,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:15:08,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:15:08,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:15:08,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:15:08,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:15:08,982 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:15:08,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:15:08,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:15:08,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:15:08,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:15:08,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:15:08,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:15:08,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:15:08,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:15:08,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:15:08,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:15:08,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:15:08,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:15:08,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:15:08,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:15:08,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:15:08,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:15:08,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:15:08,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:15:08,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:15:08,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:15:08,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:15:08,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:15:08,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:15:08,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:15:08,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:15:08,992 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_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2021-11-22 15:15:09,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:15:09,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:15:09,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:15:09,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:15:09,262 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:15:09,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-22 15:15:09,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/data/075023019/07f7822276e5451c9d139d23f524607c/FLAG4d3a21d63 [2021-11-22 15:15:09,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:15:09,818 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-22 15:15:09,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/data/075023019/07f7822276e5451c9d139d23f524607c/FLAG4d3a21d63 [2021-11-22 15:15:10,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/data/075023019/07f7822276e5451c9d139d23f524607c [2021-11-22 15:15:10,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:15:10,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:15:10,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:15:10,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:15:10,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:15:10,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d63db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10, skipping insertion in model container [2021-11-22 15:15:10,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:15:10,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:15:10,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-22 15:15:10,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:15:10,452 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:15:10,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-22 15:15:10,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:15:10,513 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:15:10,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10 WrapperNode [2021-11-22 15:15:10,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:15:10,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:15:10,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:15:10,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:15:10,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,569 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-22 15:15:10,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:15:10,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:15:10,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:15:10,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:15:10,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:15:10,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:15:10,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:15:10,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:15:10,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (1/1) ... [2021-11-22 15:15:10,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:15:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:10,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:15:10,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:15:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:15:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:15:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:15:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:15:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:15:10,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:15:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:15:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:15:10,766 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:15:10,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:15:10,895 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:15:10,901 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:15:10,902 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 15:15:10,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:15:10 BoogieIcfgContainer [2021-11-22 15:15:10,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:15:10,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:15:10,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:15:10,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:15:10,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:15:10" (1/3) ... [2021-11-22 15:15:10,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254579e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:15:10, skipping insertion in model container [2021-11-22 15:15:10,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:10" (2/3) ... [2021-11-22 15:15:10,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254579e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:15:10, skipping insertion in model container [2021-11-22 15:15:10,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:15:10" (3/3) ... [2021-11-22 15:15:10,912 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2021-11-22 15:15:10,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:15:10,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:15:10,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:15:10,973 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 [2021-11-22 15:15:10,974 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:15:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:15:10,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:10,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:10,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2021-11-22 15:15:11,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:11,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106064833] [2021-11-22 15:15:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:11,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:15:11,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106064833] [2021-11-22 15:15:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106064833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:15:11,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:15:11,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:15:11,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280080783] [2021-11-22 15:15:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:15:11,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:15:11,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:15:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:15:11,243 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:11,335 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2021-11-22 15:15:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:15:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-22 15:15:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:11,347 INFO L225 Difference]: With dead ends: 56 [2021-11-22 15:15:11,348 INFO L226 Difference]: Without dead ends: 32 [2021-11-22 15:15:11,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:15:11,356 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:11,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-22 15:15:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-22 15:15:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-22 15:15:11,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2021-11-22 15:15:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:11,394 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-22 15:15:11,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-22 15:15:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:15:11,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:11,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:11,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:15:11,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2021-11-22 15:15:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518143637] [2021-11-22 15:15:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:11,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:15:11,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518143637] [2021-11-22 15:15:11,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518143637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:11,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020618420] [2021-11-22 15:15:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:11,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:11,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:11,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:15:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:15:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:15:11,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:15:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020618420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:11,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:11,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:15:11,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319889644] [2021-11-22 15:15:11,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:11,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:15:11,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:15:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:15:11,737 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:11,852 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2021-11-22 15:15:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:15:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 22 [2021-11-22 15:15:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:11,856 INFO L225 Difference]: With dead ends: 77 [2021-11-22 15:15:11,857 INFO L226 Difference]: Without dead ends: 59 [2021-11-22 15:15:11,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:15:11,867 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:11,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-22 15:15:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-22 15:15:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2021-11-22 15:15:11,886 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 22 [2021-11-22 15:15:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:11,892 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2021-11-22 15:15:11,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2021-11-22 15:15:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 15:15:11,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:11,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:11,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 15:15:12,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:12,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1687151938, now seen corresponding path program 2 times [2021-11-22 15:15:12,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:12,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954018813] [2021-11-22 15:15:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:12,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-22 15:15:12,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954018813] [2021-11-22 15:15:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954018813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:15:12,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:15:12,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:15:12,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661668026] [2021-11-22 15:15:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:15:12,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:15:12,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:15:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:15:12,332 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:12,426 INFO L93 Difference]: Finished difference Result 111 states and 162 transitions. [2021-11-22 15:15:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:15:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 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 58 [2021-11-22 15:15:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:12,432 INFO L225 Difference]: With dead ends: 111 [2021-11-22 15:15:12,432 INFO L226 Difference]: Without dead ends: 83 [2021-11-22 15:15:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:15:12,438 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-22 15:15:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-11-22 15:15:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-22 15:15:12,457 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 58 [2021-11-22 15:15:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:12,458 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-22 15:15:12,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-22 15:15:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 15:15:12,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:12,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:12,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:15:12,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 1 times [2021-11-22 15:15:12,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:12,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044515542] [2021-11-22 15:15:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:12,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-22 15:15:12,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:12,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044515542] [2021-11-22 15:15:12,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044515542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:12,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578872816] [2021-11-22 15:15:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:12,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:12,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:12,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:15:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:12,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:15:12,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-22 15:15:12,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-22 15:15:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578872816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:13,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-22 15:15:13,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203437393] [2021-11-22 15:15:13,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 15:15:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 15:15:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:15:13,121 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-22 15:15:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:13,362 INFO L93 Difference]: Finished difference Result 235 states and 340 transitions. [2021-11-22 15:15:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:15:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 58 [2021-11-22 15:15:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:13,367 INFO L225 Difference]: With dead ends: 235 [2021-11-22 15:15:13,368 INFO L226 Difference]: Without dead ends: 171 [2021-11-22 15:15:13,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:15:13,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:13,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 88 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:15:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-22 15:15:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-22 15:15:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3705882352941177) internal successors, (233), 170 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 233 transitions. [2021-11-22 15:15:13,409 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 233 transitions. Word has length 58 [2021-11-22 15:15:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:13,410 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 233 transitions. [2021-11-22 15:15:13,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-22 15:15:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 233 transitions. [2021-11-22 15:15:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-22 15:15:13,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:13,417 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:13,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:13,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:13,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650066, now seen corresponding path program 2 times [2021-11-22 15:15:13,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458906939] [2021-11-22 15:15:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:13,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-22 15:15:13,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:13,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458906939] [2021-11-22 15:15:13,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458906939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:13,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002522734] [2021-11-22 15:15:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:15:13,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:13,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:13,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:15:14,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:15:14,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:15:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-22 15:15:14,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-22 15:15:14,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002522734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:14,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:14,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-22 15:15:14,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974056964] [2021-11-22 15:15:14,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:14,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:15:14,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:15:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:15:14,634 INFO L87 Difference]: Start difference. First operand 171 states and 233 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:15,131 INFO L93 Difference]: Finished difference Result 511 states and 742 transitions. [2021-11-22 15:15:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:15:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-22 15:15:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:15,135 INFO L225 Difference]: With dead ends: 511 [2021-11-22 15:15:15,135 INFO L226 Difference]: Without dead ends: 363 [2021-11-22 15:15:15,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:15:15,140 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 917 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:15,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 152 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:15:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-22 15:15:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-11-22 15:15:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.37292817679558) internal successors, (497), 362 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 497 transitions. [2021-11-22 15:15:15,183 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 497 transitions. Word has length 130 [2021-11-22 15:15:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:15,185 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 497 transitions. [2021-11-22 15:15:15,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 497 transitions. [2021-11-22 15:15:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-22 15:15:15,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:15,196 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:15,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:15:15,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:15,419 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1176972730, now seen corresponding path program 3 times [2021-11-22 15:15:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593530486] [2021-11-22 15:15:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:15,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-22 15:15:15,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593530486] [2021-11-22 15:15:15,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593530486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559648714] [2021-11-22 15:15:15,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:15:15,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:15,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:15,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:15:16,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:15:16,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:15:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:16,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 15:15:18,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:15:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-11-22 15:15:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2021-11-22 15:15:18,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:20,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-22 15:15:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-11-22 15:15:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2021-11-22 15:15:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559648714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:20,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:20,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 37 [2021-11-22 15:15:20,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337314980] [2021-11-22 15:15:20,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:20,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:15:20,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:15:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 15:15:20,206 INFO L87 Difference]: Start difference. First operand 363 states and 497 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:20,486 INFO L93 Difference]: Finished difference Result 1134 states and 1475 transitions. [2021-11-22 15:15:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 15:15:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 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 274 [2021-11-22 15:15:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:20,493 INFO L225 Difference]: With dead ends: 1134 [2021-11-22 15:15:20,493 INFO L226 Difference]: Without dead ends: 818 [2021-11-22 15:15:20,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 536 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1033, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 15:15:20,497 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:20,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 121 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2021-11-22 15:15:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-22 15:15:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 549. [2021-11-22 15:15:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3704379562043796) internal successors, (751), 548 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 751 transitions. [2021-11-22 15:15:20,532 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 751 transitions. Word has length 274 [2021-11-22 15:15:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:20,532 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 751 transitions. [2021-11-22 15:15:20,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 751 transitions. [2021-11-22 15:15:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-22 15:15:20,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:20,539 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:20,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:20,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 15:15:20,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -246984626, now seen corresponding path program 1 times [2021-11-22 15:15:20,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722213625] [2021-11-22 15:15:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:20,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-22 15:15:21,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:21,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722213625] [2021-11-22 15:15:21,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722213625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:21,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824404512] [2021-11-22 15:15:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:21,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:21,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:21,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:15:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:15:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-22 15:15:21,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-22 15:15:23,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824404512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:23,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:23,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-11-22 15:15:23,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438184196] [2021-11-22 15:15:23,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:23,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 15:15:23,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 15:15:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 15:15:23,327 INFO L87 Difference]: Start difference. First operand 549 states and 751 transitions. Second operand has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:24,846 INFO L93 Difference]: Finished difference Result 2129 states and 2949 transitions. [2021-11-22 15:15:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-22 15:15:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 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 280 [2021-11-22 15:15:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:24,858 INFO L225 Difference]: With dead ends: 2129 [2021-11-22 15:15:24,859 INFO L226 Difference]: Without dead ends: 1633 [2021-11-22 15:15:24,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 15:15:24,862 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2782 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2782 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:24,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2782 Valid, 344 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 15:15:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-11-22 15:15:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1263. [2021-11-22 15:15:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 1.3748019017432647) internal successors, (1735), 1262 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1735 transitions. [2021-11-22 15:15:24,907 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1735 transitions. Word has length 280 [2021-11-22 15:15:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:24,907 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 1735 transitions. [2021-11-22 15:15:24,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1735 transitions. [2021-11-22 15:15:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-11-22 15:15:24,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:24,929 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:24,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:25,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1627801764, now seen corresponding path program 2 times [2021-11-22 15:15:25,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:25,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441572459] [2021-11-22 15:15:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2021-11-22 15:15:26,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441572459] [2021-11-22 15:15:26,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441572459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555950029] [2021-11-22 15:15:26,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:15:26,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:26,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:26,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:26,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:15:27,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:15:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-22 15:15:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2021-11-22 15:15:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2021-11-22 15:15:31,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555950029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:31,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:31,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2021-11-22 15:15:31,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633706061] [2021-11-22 15:15:31,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:31,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-22 15:15:31,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-22 15:15:31,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-22 15:15:31,752 INFO L87 Difference]: Start difference. First operand 1263 states and 1735 transitions. Second operand has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:39,183 INFO L93 Difference]: Finished difference Result 4373 states and 6072 transitions. [2021-11-22 15:15:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-22 15:15:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 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 634 [2021-11-22 15:15:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:39,202 INFO L225 Difference]: With dead ends: 4373 [2021-11-22 15:15:39,202 INFO L226 Difference]: Without dead ends: 3217 [2021-11-22 15:15:39,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-22 15:15:39,208 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7244 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7244 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:39,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7244 Valid, 658 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-22 15:15:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-11-22 15:15:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 2559. [2021-11-22 15:15:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 1.3749022673964035) internal successors, (3517), 2558 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3517 transitions. [2021-11-22 15:15:39,292 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3517 transitions. Word has length 634 [2021-11-22 15:15:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:39,293 INFO L470 AbstractCegarLoop]: Abstraction has 2559 states and 3517 transitions. [2021-11-22 15:15:39,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3517 transitions. [2021-11-22 15:15:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1283 [2021-11-22 15:15:39,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:39,370 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:39,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 15:15:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:39,594 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash 955499952, now seen corresponding path program 3 times [2021-11-22 15:15:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121593356] [2021-11-22 15:15:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:39,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2021-11-22 15:15:44,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121593356] [2021-11-22 15:15:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121593356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130083421] [2021-11-22 15:15:44,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:15:44,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:44,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:44,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:15:44,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 15:15:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:15:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:45,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 15:15:45,357 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-22 15:15:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-22 15:15:55,337 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-22 15:15:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 52 [2021-11-22 15:15:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 524 proven. 1362 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2021-11-22 15:15:55,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:16:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2021-11-22 15:16:06,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130083421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:16:06,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:16:06,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 13, 12] total 128 [2021-11-22 15:16:06,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425545355] [2021-11-22 15:16:06,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:16:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-22 15:16:06,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:16:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-22 15:16:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7257, Invalid=8999, Unknown=0, NotChecked=0, Total=16256 [2021-11-22 15:16:06,924 INFO L87 Difference]: Start difference. First operand 2559 states and 3517 transitions. Second operand has 128 states, 128 states have (on average 2.265625) internal successors, (290), 128 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:16:08,570 INFO L93 Difference]: Finished difference Result 7967 states and 10834 transitions. [2021-11-22 15:16:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-22 15:16:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.265625) internal successors, (290), 128 states have internal predecessors, (290), 0 states have call successors, (0), 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 1282 [2021-11-22 15:16:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:16:08,602 INFO L225 Difference]: With dead ends: 7967 [2021-11-22 15:16:08,602 INFO L226 Difference]: Without dead ends: 5623 [2021-11-22 15:16:08,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2680 GetRequests, 2545 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7452, Invalid=10638, Unknown=0, NotChecked=0, Total=18090 [2021-11-22 15:16:08,617 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 690 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:16:08,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 196 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 252 Invalid, 0 Unknown, 280 Unchecked, 0.4s Time] [2021-11-22 15:16:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5623 states. [2021-11-22 15:16:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5623 to 3423. [2021-11-22 15:16:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 1.374634716540035) internal successors, (4704), 3422 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 4704 transitions. [2021-11-22 15:16:08,754 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 4704 transitions. Word has length 1282 [2021-11-22 15:16:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:16:08,755 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 4704 transitions. [2021-11-22 15:16:08,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.265625) internal successors, (290), 128 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 4704 transitions. [2021-11-22 15:16:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2021-11-22 15:16:08,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:16:08,774 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:16:08,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:16:09,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 15:16:09,002 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:16:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:16:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1356421522, now seen corresponding path program 1 times [2021-11-22 15:16:09,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:16:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220339916] [2021-11-22 15:16:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:16:09,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:16:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:16:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 67311 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 66680 trivial. 0 not checked. [2021-11-22 15:16:09,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:16:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220339916] [2021-11-22 15:16:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220339916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:16:09,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:16:09,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:16:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143983076] [2021-11-22 15:16:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:16:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:16:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:16:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:16:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:16:09,709 INFO L87 Difference]: Start difference. First operand 3423 states and 4704 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:16:09,775 INFO L93 Difference]: Finished difference Result 6266 states and 8701 transitions. [2021-11-22 15:16:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:16:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 1284 [2021-11-22 15:16:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:16:09,794 INFO L225 Difference]: With dead ends: 6266 [2021-11-22 15:16:09,794 INFO L226 Difference]: Without dead ends: 3405 [2021-11-22 15:16:09,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:16:09,799 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:16:09,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:16:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3405 states. [2021-11-22 15:16:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3405 to 3187. [2021-11-22 15:16:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 1.300690521029504) internal successors, (4144), 3186 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 4144 transitions. [2021-11-22 15:16:09,903 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 4144 transitions. Word has length 1284 [2021-11-22 15:16:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:16:09,906 INFO L470 AbstractCegarLoop]: Abstraction has 3187 states and 4144 transitions. [2021-11-22 15:16:09,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:16:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 4144 transitions. [2021-11-22 15:16:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2021-11-22 15:16:09,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:16:09,925 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:16:09,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:16:09,925 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:16:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:16:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1984462866, now seen corresponding path program 4 times [2021-11-22 15:16:09,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:16:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518151527] [2021-11-22 15:16:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:16:09,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:16:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:16:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 67311 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2021-11-22 15:16:14,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:16:14,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518151527] [2021-11-22 15:16:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518151527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:16:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142485424] [2021-11-22 15:16:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:16:14,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:16:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:16:14,610 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:16:14,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:16:15,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:16:15,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:16:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 429 conjunts are in the unsatisfiable core [2021-11-22 15:16:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:16:19,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-22 15:16:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 67311 backedges. 526 proven. 55336 refuted. 0 times theorem prover too weak. 11449 trivial. 0 not checked. [2021-11-22 15:16:33,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:16:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-22 15:16:51,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-22 15:16:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 67311 backedges. 526 proven. 55336 refuted. 0 times theorem prover too weak. 11449 trivial. 0 not checked. [2021-11-22 15:16:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142485424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:16:52,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:16:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 216, 216] total 430 [2021-11-22 15:16:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162710636] [2021-11-22 15:16:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:16:52,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 430 states [2021-11-22 15:16:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:16:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 430 interpolants. [2021-11-22 15:16:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18717, Invalid=165753, Unknown=0, NotChecked=0, Total=184470 [2021-11-22 15:16:52,223 INFO L87 Difference]: Start difference. First operand 3187 states and 4144 transitions. Second operand has 430 states, 430 states have (on average 4.741860465116279) internal successors, (2039), 430 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:18:43,980 INFO L93 Difference]: Finished difference Result 8362 states and 10977 transitions. [2021-11-22 15:18:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 548 states. [2021-11-22 15:18:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 430 states, 430 states have (on average 4.741860465116279) internal successors, (2039), 430 states have internal predecessors, (2039), 0 states have call successors, (0), 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 1284 [2021-11-22 15:18:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:18:44,010 INFO L225 Difference]: With dead ends: 8362 [2021-11-22 15:18:44,010 INFO L226 Difference]: Without dead ends: 5392 [2021-11-22 15:18:44,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3005 GetRequests, 2247 SyntacticMatches, 1 SemanticMatches, 757 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197095 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=39630, Invalid=535692, Unknown=0, NotChecked=0, Total=575322 [2021-11-22 15:18:44,052 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 10957 mSDsluCounter, 121148 mSDsCounter, 0 mSdLazyCounter, 235354 mSolverCounterSat, 2234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10957 SdHoareTripleChecker+Valid, 121793 SdHoareTripleChecker+Invalid, 237588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 2234 IncrementalHoareTripleChecker+Valid, 235354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:18:44,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10957 Valid, 121793 Invalid, 237588 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [2234 Valid, 235354 Invalid, 0 Unknown, 0 Unchecked, 76.7s Time] [2021-11-22 15:18:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-11-22 15:18:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4412. [2021-11-22 15:18:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 1.3173883473135344) internal successors, (5811), 4411 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 5811 transitions. [2021-11-22 15:18:44,209 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 5811 transitions. Word has length 1284 [2021-11-22 15:18:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:18:44,210 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 5811 transitions. [2021-11-22 15:18:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 430 states, 430 states have (on average 4.741860465116279) internal successors, (2039), 430 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 5811 transitions. [2021-11-22 15:18:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1307 [2021-11-22 15:18:44,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:18:44,236 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:18:44,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:18:44,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:44,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:18:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1033180692, now seen corresponding path program 5 times [2021-11-22 15:18:44,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:44,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146153118] [2021-11-22 15:18:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:44,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 69660 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 57996 trivial. 0 not checked. [2021-11-22 15:18:49,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146153118] [2021-11-22 15:18:49,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146153118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:18:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424763621] [2021-11-22 15:18:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:18:49,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:18:49,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:18:49,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d452d04-3a40-4218-8de8-a1977662a5b1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process