./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c5b756d724a9cd5d9c89c4b12a854260c3278a67df891fb3233689095aa59ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:43:41,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:43:41,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:43:41,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:43:41,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:43:41,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:43:41,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:43:41,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:43:41,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:43:41,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:43:41,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:43:41,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:43:41,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:43:41,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:43:41,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:43:41,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:43:41,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:43:41,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:43:41,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:43:41,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:43:41,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:43:41,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:43:41,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:43:41,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:43:41,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:43:41,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:43:41,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:43:41,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:43:41,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:43:41,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:43:41,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:43:41,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:43:41,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:43:41,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:43:41,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:43:41,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:43:41,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:43:41,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:43:41,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:43:41,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:43:41,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:43:41,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:43:41,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:43:41,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:43:41,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:43:41,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:43:41,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:43:41,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:43:41,593 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:43:41,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:43:41,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:43:41,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:43:41,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:43:41,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:43:41,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:43:41,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:43:41,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:43:41,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:43:41,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:43:41,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:43:41,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:43:41,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:43:41,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:43:41,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:43:41,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:43:41,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:43:41,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:43:41,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:43:41,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:43:41,600 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_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5b756d724a9cd5d9c89c4b12a854260c3278a67df891fb3233689095aa59ca [2021-11-09 10:43:41,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:43:41,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:43:41,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:43:41,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:43:41,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:43:41,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-09 10:43:41,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/data/99a4a699b/4efb465d2e124186bcbce266c7c9f336/FLAG5f4cc4c85 [2021-11-09 10:43:42,502 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:43:42,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-09 10:43:42,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/data/99a4a699b/4efb465d2e124186bcbce266c7c9f336/FLAG5f4cc4c85 [2021-11-09 10:43:42,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/data/99a4a699b/4efb465d2e124186bcbce266c7c9f336 [2021-11-09 10:43:42,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:43:42,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:43:42,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:42,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:43:42,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:43:42,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:42" (1/1) ... [2021-11-09 10:43:42,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cda95bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:42, skipping insertion in model container [2021-11-09 10:43:42,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:42" (1/1) ... [2021-11-09 10:43:42,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:43:42,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:43:43,113 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6320,6333] [2021-11-09 10:43:43,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:43,165 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:43:43,222 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6320,6333] [2021-11-09 10:43:43,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:43,319 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:43:43,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43 WrapperNode [2021-11-09 10:43:43,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:43,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:43,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:43:43,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:43:43,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:43,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:43:43,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:43:43,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:43:43,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:43:43,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:43:43,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:43:43,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:43:43,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (1/1) ... [2021-11-09 10:43:43,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:43:43,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:43,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:43,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:43:43,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:43:43,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:43:43,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:43:43,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:43:44,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:43:44,279 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 10:43:44,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:44 BoogieIcfgContainer [2021-11-09 10:43:44,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:43:44,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:43:44,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:43:44,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:43:44,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:43:42" (1/3) ... [2021-11-09 10:43:44,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237abf8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:44, skipping insertion in model container [2021-11-09 10:43:44,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:43" (2/3) ... [2021-11-09 10:43:44,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237abf8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:44, skipping insertion in model container [2021-11-09 10:43:44,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:44" (3/3) ... [2021-11-09 10:43:44,291 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-09 10:43:44,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:43:44,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:43:44,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:43:44,349 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:43:44,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:43:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.7014925373134329) internal successors, (228), 135 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:43:44,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:44,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:44,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -793823884, now seen corresponding path program 1 times [2021-11-09 10:43:44,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:44,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050963213] [2021-11-09 10:43:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:44,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:44,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:44,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050963213] [2021-11-09 10:43:44,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050963213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:44,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:44,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526204216] [2021-11-09 10:43:44,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:44,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:44,794 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.7014925373134329) internal successors, (228), 135 states have internal predecessors, (228), 0 states have call successors, (0), 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 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:44,920 INFO L93 Difference]: Finished difference Result 322 states and 522 transitions. [2021-11-09 10:43:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 10:43:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:44,939 INFO L225 Difference]: With dead ends: 322 [2021-11-09 10:43:44,939 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 10:43:44,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 10:43:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-11-09 10:43:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5047169811320755) internal successors, (319), 212 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 319 transitions. [2021-11-09 10:43:45,002 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 319 transitions. Word has length 60 [2021-11-09 10:43:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:45,003 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 319 transitions. [2021-11-09 10:43:45,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 319 transitions. [2021-11-09 10:43:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:43:45,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:45,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:45,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:43:45,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1200786689, now seen corresponding path program 1 times [2021-11-09 10:43:45,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:45,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892512694] [2021-11-09 10:43:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:45,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:45,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:45,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892512694] [2021-11-09 10:43:45,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892512694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:45,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:45,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:45,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495339477] [2021-11-09 10:43:45,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:45,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,154 INFO L87 Difference]: Start difference. First operand 213 states and 319 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:45,227 INFO L93 Difference]: Finished difference Result 537 states and 835 transitions. [2021-11-09 10:43:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:43:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:45,232 INFO L225 Difference]: With dead ends: 537 [2021-11-09 10:43:45,232 INFO L226 Difference]: Without dead ends: 359 [2021-11-09 10:43:45,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-09 10:43:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2021-11-09 10:43:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5393258426966292) internal successors, (548), 356 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 548 transitions. [2021-11-09 10:43:45,305 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 548 transitions. Word has length 61 [2021-11-09 10:43:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:45,306 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 548 transitions. [2021-11-09 10:43:45,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 548 transitions. [2021-11-09 10:43:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:43:45,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:45,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:45,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:43:45,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1872640227, now seen corresponding path program 1 times [2021-11-09 10:43:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:45,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020475607] [2021-11-09 10:43:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:45,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:45,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:45,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020475607] [2021-11-09 10:43:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020475607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:45,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:45,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:45,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403217385] [2021-11-09 10:43:45,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:45,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,463 INFO L87 Difference]: Start difference. First operand 357 states and 548 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:45,546 INFO L93 Difference]: Finished difference Result 937 states and 1470 transitions. [2021-11-09 10:43:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 10:43:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:45,552 INFO L225 Difference]: With dead ends: 937 [2021-11-09 10:43:45,553 INFO L226 Difference]: Without dead ends: 615 [2021-11-09 10:43:45,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-09 10:43:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2021-11-09 10:43:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.5555555555555556) internal successors, (952), 612 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 952 transitions. [2021-11-09 10:43:45,626 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 952 transitions. Word has length 62 [2021-11-09 10:43:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:45,632 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 952 transitions. [2021-11-09 10:43:45,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 952 transitions. [2021-11-09 10:43:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:43:45,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:45,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:45,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:43:45,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -562045070, now seen corresponding path program 1 times [2021-11-09 10:43:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:45,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249255028] [2021-11-09 10:43:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:45,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:45,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:45,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249255028] [2021-11-09 10:43:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249255028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:45,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:45,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:45,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37964244] [2021-11-09 10:43:45,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:45,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,729 INFO L87 Difference]: Start difference. First operand 613 states and 952 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:45,802 INFO L93 Difference]: Finished difference Result 1641 states and 2578 transitions. [2021-11-09 10:43:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:43:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:45,811 INFO L225 Difference]: With dead ends: 1641 [2021-11-09 10:43:45,811 INFO L226 Difference]: Without dead ends: 1063 [2021-11-09 10:43:45,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-09 10:43:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1061. [2021-11-09 10:43:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.558490566037736) internal successors, (1652), 1060 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1652 transitions. [2021-11-09 10:43:45,884 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1652 transitions. Word has length 63 [2021-11-09 10:43:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:45,885 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1652 transitions. [2021-11-09 10:43:45,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1652 transitions. [2021-11-09 10:43:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:43:45,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:45,887 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:45,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:43:45,887 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1925116710, now seen corresponding path program 1 times [2021-11-09 10:43:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:45,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148798658] [2021-11-09 10:43:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:45,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:46,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:46,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148798658] [2021-11-09 10:43:46,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148798658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:46,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:46,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:46,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350830857] [2021-11-09 10:43:46,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:46,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:46,015 INFO L87 Difference]: Start difference. First operand 1061 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:46,136 INFO L93 Difference]: Finished difference Result 2857 states and 4470 transitions. [2021-11-09 10:43:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 10:43:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:46,149 INFO L225 Difference]: With dead ends: 2857 [2021-11-09 10:43:46,149 INFO L226 Difference]: Without dead ends: 1831 [2021-11-09 10:43:46,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-09 10:43:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1829. [2021-11-09 10:43:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 1.5514223194748358) internal successors, (2836), 1828 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2836 transitions. [2021-11-09 10:43:46,266 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2836 transitions. Word has length 64 [2021-11-09 10:43:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:46,266 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2836 transitions. [2021-11-09 10:43:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2836 transitions. [2021-11-09 10:43:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:43:46,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:46,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:43:46,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash 210559993, now seen corresponding path program 1 times [2021-11-09 10:43:46,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:46,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468151447] [2021-11-09 10:43:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:46,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:46,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468151447] [2021-11-09 10:43:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468151447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:46,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:46,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:43:46,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775326121] [2021-11-09 10:43:46,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:43:46,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:43:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:46,535 INFO L87 Difference]: Start difference. First operand 1829 states and 2836 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-11-09 10:43:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:47,218 INFO L93 Difference]: Finished difference Result 9439 states and 14601 transitions. [2021-11-09 10:43:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:43:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 10:43:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:47,280 INFO L225 Difference]: With dead ends: 9439 [2021-11-09 10:43:47,280 INFO L226 Difference]: Without dead ends: 7645 [2021-11-09 10:43:47,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2021-11-09 10:43:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 7637. [2021-11-09 10:43:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7637 states, 7636 states have (on average 1.540597171293871) internal successors, (11764), 7636 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 11764 transitions. [2021-11-09 10:43:47,953 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 11764 transitions. Word has length 65 [2021-11-09 10:43:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:47,954 INFO L470 AbstractCegarLoop]: Abstraction has 7637 states and 11764 transitions. [2021-11-09 10:43:47,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-11-09 10:43:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 11764 transitions. [2021-11-09 10:43:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:43:47,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:47,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:47,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:43:47,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:47,959 INFO L85 PathProgramCache]: Analyzing trace with hash 701566096, now seen corresponding path program 1 times [2021-11-09 10:43:47,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:47,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446524505] [2021-11-09 10:43:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:47,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:48,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:48,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446524505] [2021-11-09 10:43:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446524505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:48,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:48,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:43:48,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659339783] [2021-11-09 10:43:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:48,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:48,066 INFO L87 Difference]: Start difference. First operand 7637 states and 11764 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:49,297 INFO L93 Difference]: Finished difference Result 21513 states and 33190 transitions. [2021-11-09 10:43:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:43:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-09 10:43:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:49,394 INFO L225 Difference]: With dead ends: 21513 [2021-11-09 10:43:49,394 INFO L226 Difference]: Without dead ends: 13911 [2021-11-09 10:43:49,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13911 states. [2021-11-09 10:43:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13911 to 13909. [2021-11-09 10:43:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13909 states, 13908 states have (on average 1.53264308311763) internal successors, (21316), 13908 states have internal predecessors, (21316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13909 states to 13909 states and 21316 transitions. [2021-11-09 10:43:50,530 INFO L78 Accepts]: Start accepts. Automaton has 13909 states and 21316 transitions. Word has length 67 [2021-11-09 10:43:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:50,531 INFO L470 AbstractCegarLoop]: Abstraction has 13909 states and 21316 transitions. [2021-11-09 10:43:50,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 13909 states and 21316 transitions. [2021-11-09 10:43:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:43:50,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:50,532 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:50,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:43:50,533 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1975896309, now seen corresponding path program 1 times [2021-11-09 10:43:50,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:50,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101101935] [2021-11-09 10:43:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:50,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:50,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:50,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101101935] [2021-11-09 10:43:50,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101101935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:50,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:50,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:43:50,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72427471] [2021-11-09 10:43:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:43:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:43:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:50,677 INFO L87 Difference]: Start difference. First operand 13909 states and 21316 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:54,615 INFO L93 Difference]: Finished difference Result 73985 states and 113546 transitions. [2021-11-09 10:43:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:43:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-09 10:43:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:54,800 INFO L225 Difference]: With dead ends: 73985 [2021-11-09 10:43:54,800 INFO L226 Difference]: Without dead ends: 60111 [2021-11-09 10:43:54,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:43:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60111 states. [2021-11-09 10:43:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60111 to 27781. [2021-11-09 10:43:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27781 states, 27780 states have (on average 1.5125989920806335) internal successors, (42020), 27780 states have internal predecessors, (42020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27781 states to 27781 states and 42020 transitions. [2021-11-09 10:43:57,259 INFO L78 Accepts]: Start accepts. Automaton has 27781 states and 42020 transitions. Word has length 67 [2021-11-09 10:43:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:57,260 INFO L470 AbstractCegarLoop]: Abstraction has 27781 states and 42020 transitions. [2021-11-09 10:43:57,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 27781 states and 42020 transitions. [2021-11-09 10:43:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:43:57,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:57,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:57,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:43:57,263 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1142699675, now seen corresponding path program 1 times [2021-11-09 10:43:57,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:57,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976011097] [2021-11-09 10:43:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:57,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:57,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:57,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976011097] [2021-11-09 10:43:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976011097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:57,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:57,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209252264] [2021-11-09 10:43:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:57,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:57,354 INFO L87 Difference]: Start difference. First operand 27781 states and 42020 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:00,718 INFO L93 Difference]: Finished difference Result 56679 states and 85157 transitions. [2021-11-09 10:44:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:44:00,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-09 10:44:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:00,852 INFO L225 Difference]: With dead ends: 56679 [2021-11-09 10:44:00,852 INFO L226 Difference]: Without dead ends: 56677 [2021-11-09 10:44:00,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:44:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56677 states. [2021-11-09 10:44:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56677 to 28933. [2021-11-09 10:44:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28933 states, 28932 states have (on average 1.4921885801188994) internal successors, (43172), 28932 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28933 states to 28933 states and 43172 transitions. [2021-11-09 10:44:03,373 INFO L78 Accepts]: Start accepts. Automaton has 28933 states and 43172 transitions. Word has length 68 [2021-11-09 10:44:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:03,374 INFO L470 AbstractCegarLoop]: Abstraction has 28933 states and 43172 transitions. [2021-11-09 10:44:03,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28933 states and 43172 transitions. [2021-11-09 10:44:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:44:03,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:03,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:03,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:44:03,376 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1053378469, now seen corresponding path program 1 times [2021-11-09 10:44:03,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:03,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222432199] [2021-11-09 10:44:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:03,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:03,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:03,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222432199] [2021-11-09 10:44:03,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222432199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:03,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:03,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:03,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51262965] [2021-11-09 10:44:03,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:03,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:03,458 INFO L87 Difference]: Start difference. First operand 28933 states and 43172 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:05,830 INFO L93 Difference]: Finished difference Result 65147 states and 97016 transitions. [2021-11-09 10:44:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 10:44:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:05,920 INFO L225 Difference]: With dead ends: 65147 [2021-11-09 10:44:05,920 INFO L226 Difference]: Without dead ends: 36249 [2021-11-09 10:44:05,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36249 states. [2021-11-09 10:44:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36249 to 36247. [2021-11-09 10:44:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36247 states, 36246 states have (on average 1.4824808254703967) internal successors, (53734), 36246 states have internal predecessors, (53734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36247 states to 36247 states and 53734 transitions. [2021-11-09 10:44:08,741 INFO L78 Accepts]: Start accepts. Automaton has 36247 states and 53734 transitions. Word has length 69 [2021-11-09 10:44:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:08,741 INFO L470 AbstractCegarLoop]: Abstraction has 36247 states and 53734 transitions. [2021-11-09 10:44:08,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 36247 states and 53734 transitions. [2021-11-09 10:44:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 10:44:08,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:08,760 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:08,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:44:08,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -212554062, now seen corresponding path program 1 times [2021-11-09 10:44:08,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:08,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932295360] [2021-11-09 10:44:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:08,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932295360] [2021-11-09 10:44:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932295360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309546630] [2021-11-09 10:44:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:09,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:09,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:09,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:09,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4ffa8-ef27-4b92-a197-66d17fd4a8d5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:44:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:44:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:44:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309546630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:09,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-09 10:44:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239483485] [2021-11-09 10:44:09,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:44:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:44:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:44:09,714 INFO L87 Difference]: Start difference. First operand 36247 states and 53734 transitions. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)