./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/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 2681af3d0e7a855e7c1df29ae8aaea4fb6a9ccdacb1eaa8fd0beb28518bc1fed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:30:21,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:30:21,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:30:21,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:30:21,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:30:21,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:30:21,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:30:21,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:30:21,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:30:21,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:30:21,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:30:21,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:30:21,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:30:21,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:30:21,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:30:21,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:30:21,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:30:21,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:30:21,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:30:21,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:30:21,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:30:21,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:30:21,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:30:21,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:30:21,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:30:21,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:30:21,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:30:21,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:30:21,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:30:21,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:30:21,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:30:21,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:30:21,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:30:21,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:30:21,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:30:21,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:30:21,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:30:21,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:30:21,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:30:21,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:30:21,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:30:21,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:30:21,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:30:21,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:30:21,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:30:21,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:30:21,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:30:21,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:30:21,627 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:30:21,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:30:21,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:30:21,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:30:21,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:30:21,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:30:21,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:30:21,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:30:21,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:30:21,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:30:21,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:30:21,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:30:21,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:30:21,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:30:21,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:30:21,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:30:21,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:21,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:30:21,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:30:21,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:30:21,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:30:21,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:30:21,633 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:30:21,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:30:21,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:30:21,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:30:21,636 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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2681af3d0e7a855e7c1df29ae8aaea4fb6a9ccdacb1eaa8fd0beb28518bc1fed [2021-11-09 08:30:21,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:30:21,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:30:21,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:30:21,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:30:21,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:30:21,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 08:30:22,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/data/ec167c05f/b6f9727d557f47d8b58ffe70ddb25a3d/FLAG034859a5d [2021-11-09 08:30:22,957 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:30:22,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 08:30:23,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/data/ec167c05f/b6f9727d557f47d8b58ffe70ddb25a3d/FLAG034859a5d [2021-11-09 08:30:23,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/data/ec167c05f/b6f9727d557f47d8b58ffe70ddb25a3d [2021-11-09 08:30:23,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:30:23,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:30:23,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:23,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:30:23,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:30:23,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:23" (1/1) ... [2021-11-09 08:30:23,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7a30ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:23, skipping insertion in model container [2021-11-09 08:30:23,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:23" (1/1) ... [2021-11-09 08:30:23,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:30:23,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:30:24,029 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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c[26912,26925] [2021-11-09 08:30:24,083 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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c[33605,33618] [2021-11-09 08:30:25,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:25,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:30:25,084 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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c[26912,26925] [2021-11-09 08:30:25,130 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_0f1db3cb-6a15-4c80-a829-99f8df0962bd/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c[33605,33618] [2021-11-09 08:30:25,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:25,751 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:30:25,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25 WrapperNode [2021-11-09 08:30:25,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:25,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:25,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:30:25,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:30:25,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:25,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:26,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:30:26,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:30:26,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:30:26,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:30:26,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:30:26,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:30:26,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:30:26,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (1/1) ... [2021-11-09 08:30:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:26,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:30:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1db3cb-6a15-4c80-a829-99f8df0962bd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:30:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:30:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:30:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:30:26,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:30:31,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:30:31,966 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2021-11-09 08:30:31,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:31 BoogieIcfgContainer [2021-11-09 08:30:31,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:30:31,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:30:31,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:30:31,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:30:31,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:30:23" (1/3) ... [2021-11-09 08:30:31,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552710d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:31, skipping insertion in model container [2021-11-09 08:30:31,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:25" (2/3) ... [2021-11-09 08:30:31,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552710d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:31, skipping insertion in model container [2021-11-09 08:30:31,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:31" (3/3) ... [2021-11-09 08:30:31,984 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 08:30:31,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:30:31,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 08:30:32,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:30:32,073 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 08:30:32,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 08:30:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 964 states, 961 states have (on average 1.8969823100936525) internal successors, (1823), 963 states have internal predecessors, (1823), 0 states have call successors, (0), 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 08:30:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:30:32,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:32,128 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] [2021-11-09 08:30:32,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2021-11-09 08:30:32,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:32,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286275021] [2021-11-09 08:30:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:32,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:32,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286275021] [2021-11-09 08:30:32,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286275021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:32,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:32,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:30:32,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189950690] [2021-11-09 08:30:32,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:30:32,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:30:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:30:32,438 INFO L87 Difference]: Start difference. First operand has 964 states, 961 states have (on average 1.8969823100936525) internal successors, (1823), 963 states have internal predecessors, (1823), 0 states have call successors, (0), 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 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 08:30:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:32,541 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2021-11-09 08:30:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:30:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-09 08:30:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:32,576 INFO L225 Difference]: With dead ends: 1859 [2021-11-09 08:30:32,576 INFO L226 Difference]: Without dead ends: 898 [2021-11-09 08:30:32,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:30:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-09 08:30:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2021-11-09 08:30:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8861607142857142) internal successors, (1690), 897 states have internal predecessors, (1690), 0 states have call successors, (0), 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 08:30:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2021-11-09 08:30:32,674 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2021-11-09 08:30:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2021-11-09 08:30:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 08:30:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2021-11-09 08:30:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:30:32,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:32,678 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] [2021-11-09 08:30:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:30:32,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-11-09 08:30:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:32,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281226861] [2021-11-09 08:30:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:32,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:32,832 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 08:30:32,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:32,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281226861] [2021-11-09 08:30:32,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281226861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:32,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:32,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:30:32,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99616475] [2021-11-09 08:30:32,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:32,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:32,838 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 08:30:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:32,988 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2021-11-09 08:30:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-09 08:30:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:32,995 INFO L225 Difference]: With dead ends: 979 [2021-11-09 08:30:32,996 INFO L226 Difference]: Without dead ends: 898 [2021-11-09 08:30:32,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-09 08:30:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2021-11-09 08:30:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8180803571428572) internal successors, (1629), 897 states have internal predecessors, (1629), 0 states have call successors, (0), 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 08:30:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2021-11-09 08:30:33,032 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2021-11-09 08:30:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:33,032 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2021-11-09 08:30:33,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 08:30:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2021-11-09 08:30:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:30:33,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:33,036 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 08:30:33,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:30:33,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1703499387, now seen corresponding path program 1 times [2021-11-09 08:30:33,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:33,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458180010] [2021-11-09 08:30:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:33,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:33,238 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 08:30:33,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:33,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458180010] [2021-11-09 08:30:33,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458180010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:33,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:33,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:33,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56773290] [2021-11-09 08:30:33,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:33,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:33,254 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand has 4 states, 4 states have (on average 15.0) 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 08:30:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,842 INFO L93 Difference]: Finished difference Result 3153 states and 5938 transitions. [2021-11-09 08:30:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) 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 08:30:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,858 INFO L225 Difference]: With dead ends: 3153 [2021-11-09 08:30:40,859 INFO L226 Difference]: Without dead ends: 2400 [2021-11-09 08:30:40,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-11-09 08:30:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2021-11-09 08:30:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2398 states have (on average 1.5033361134278564) internal successors, (3605), 2399 states have internal predecessors, (3605), 0 states have call successors, (0), 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 08:30:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3605 transitions. [2021-11-09 08:30:40,925 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3605 transitions. Word has length 60 [2021-11-09 08:30:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,926 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 3605 transitions. [2021-11-09 08:30:40,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) 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 08:30:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3605 transitions. [2021-11-09 08:30:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:40,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:40,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:30:40,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-11-09 08:30:40,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:40,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687660669] [2021-11-09 08:30:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,135 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 08:30:41,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687660669] [2021-11-09 08:30:41,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687660669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:41,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:41,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:41,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509211288] [2021-11-09 08:30:41,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:41,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:41,143 INFO L87 Difference]: Start difference. First operand 2400 states and 3605 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,186 INFO L93 Difference]: Finished difference Result 2548 states and 3841 transitions. [2021-11-09 08:30:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,203 INFO L225 Difference]: With dead ends: 2548 [2021-11-09 08:30:41,203 INFO L226 Difference]: Without dead ends: 2471 [2021-11-09 08:30:41,205 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 08:30:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-11-09 08:30:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2021-11-09 08:30:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2467 states have (on average 1.506282934738549) internal successors, (3716), 2468 states have internal predecessors, (3716), 0 states have call successors, (0), 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 08:30:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3716 transitions. [2021-11-09 08:30:41,272 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3716 transitions. Word has length 106 [2021-11-09 08:30:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,273 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 3716 transitions. [2021-11-09 08:30:41,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3716 transitions. [2021-11-09 08:30:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:41,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,276 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:41,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:30:41,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-11-09 08:30:41,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735368105] [2021-11-09 08:30:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,405 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 08:30:41,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735368105] [2021-11-09 08:30:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735368105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:41,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:41,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955860132] [2021-11-09 08:30:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:41,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:41,408 INFO L87 Difference]: Start difference. First operand 2469 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,463 INFO L93 Difference]: Finished difference Result 2749 states and 4164 transitions. [2021-11-09 08:30:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:41,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,482 INFO L225 Difference]: With dead ends: 2749 [2021-11-09 08:30:41,483 INFO L226 Difference]: Without dead ends: 2603 [2021-11-09 08:30:41,484 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 08:30:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-11-09 08:30:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2021-11-09 08:30:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2599 states have (on average 1.5109657560600231) internal successors, (3927), 2600 states have internal predecessors, (3927), 0 states have call successors, (0), 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 08:30:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3927 transitions. [2021-11-09 08:30:41,555 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3927 transitions. Word has length 106 [2021-11-09 08:30:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,555 INFO L470 AbstractCegarLoop]: Abstraction has 2601 states and 3927 transitions. [2021-11-09 08:30:41,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3927 transitions. [2021-11-09 08:30:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:41,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:41,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:30:41,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-11-09 08:30:41,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684870634] [2021-11-09 08:30:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,689 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 08:30:41,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684870634] [2021-11-09 08:30:41,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684870634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:41,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:41,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026517200] [2021-11-09 08:30:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:41,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:41,698 INFO L87 Difference]: Start difference. First operand 2601 states and 3927 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,752 INFO L93 Difference]: Finished difference Result 3133 states and 4777 transitions. [2021-11-09 08:30:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,777 INFO L225 Difference]: With dead ends: 3133 [2021-11-09 08:30:41,777 INFO L226 Difference]: Without dead ends: 2855 [2021-11-09 08:30:41,778 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 08:30:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-11-09 08:30:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2021-11-09 08:30:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2851 states have (on average 1.5177130831287267) internal successors, (4327), 2852 states have internal predecessors, (4327), 0 states have call successors, (0), 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 08:30:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4327 transitions. [2021-11-09 08:30:41,876 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4327 transitions. Word has length 106 [2021-11-09 08:30:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 2853 states and 4327 transitions. [2021-11-09 08:30:41,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4327 transitions. [2021-11-09 08:30:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:41,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:30:41,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-11-09 08:30:41,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549244754] [2021-11-09 08:30:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,980 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 08:30:41,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549244754] [2021-11-09 08:30:41,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549244754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:41,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:41,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:41,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123129681] [2021-11-09 08:30:41,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:41,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:41,983 INFO L87 Difference]: Start difference. First operand 2853 states and 4327 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,045 INFO L93 Difference]: Finished difference Result 3865 states and 5937 transitions. [2021-11-09 08:30:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,066 INFO L225 Difference]: With dead ends: 3865 [2021-11-09 08:30:42,066 INFO L226 Difference]: Without dead ends: 3335 [2021-11-09 08:30:42,068 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 08:30:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-11-09 08:30:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2021-11-09 08:30:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3331 states have (on average 1.5259681777244072) internal successors, (5083), 3332 states have internal predecessors, (5083), 0 states have call successors, (0), 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 08:30:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5083 transitions. [2021-11-09 08:30:42,170 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5083 transitions. Word has length 106 [2021-11-09 08:30:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:42,171 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 5083 transitions. [2021-11-09 08:30:42,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5083 transitions. [2021-11-09 08:30:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:42,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:42,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:42,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:30:42,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-11-09 08:30:42,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:42,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664783460] [2021-11-09 08:30:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:42,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:42,252 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 08:30:42,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:42,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664783460] [2021-11-09 08:30:42,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664783460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:42,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:42,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:42,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641113505] [2021-11-09 08:30:42,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:42,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:42,255 INFO L87 Difference]: Start difference. First operand 3333 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,358 INFO L93 Difference]: Finished difference Result 5257 states and 8125 transitions. [2021-11-09 08:30:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,383 INFO L225 Difference]: With dead ends: 5257 [2021-11-09 08:30:42,383 INFO L226 Difference]: Without dead ends: 4247 [2021-11-09 08:30:42,386 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 08:30:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-11-09 08:30:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4245. [2021-11-09 08:30:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4243 states have (on average 1.5335847277869432) internal successors, (6507), 4244 states have internal predecessors, (6507), 0 states have call successors, (0), 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 08:30:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6507 transitions. [2021-11-09 08:30:42,536 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6507 transitions. Word has length 106 [2021-11-09 08:30:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:42,537 INFO L470 AbstractCegarLoop]: Abstraction has 4245 states and 6507 transitions. [2021-11-09 08:30:42,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6507 transitions. [2021-11-09 08:30:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:42,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:42,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:42,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:30:42,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-11-09 08:30:42,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:42,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497063397] [2021-11-09 08:30:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:42,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:42,604 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 08:30:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497063397] [2021-11-09 08:30:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497063397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:42,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:42,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:42,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763023735] [2021-11-09 08:30:42,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:42,607 INFO L87 Difference]: Start difference. First operand 4245 states and 6507 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,802 INFO L93 Difference]: Finished difference Result 7897 states and 12237 transitions. [2021-11-09 08:30:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,850 INFO L225 Difference]: With dead ends: 7897 [2021-11-09 08:30:42,850 INFO L226 Difference]: Without dead ends: 5975 [2021-11-09 08:30:42,856 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 08:30:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2021-11-09 08:30:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5973. [2021-11-09 08:30:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5971 states have (on average 1.5372634399598057) internal successors, (9179), 5972 states have internal predecessors, (9179), 0 states have call successors, (0), 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 08:30:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 9179 transitions. [2021-11-09 08:30:43,107 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 9179 transitions. Word has length 106 [2021-11-09 08:30:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:43,107 INFO L470 AbstractCegarLoop]: Abstraction has 5973 states and 9179 transitions. [2021-11-09 08:30:43,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 9179 transitions. [2021-11-09 08:30:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:43,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:43,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:43,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:30:43,112 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-11-09 08:30:43,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:43,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163885737] [2021-11-09 08:30:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:43,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:43,174 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 08:30:43,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:43,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163885737] [2021-11-09 08:30:43,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163885737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:43,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:43,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:43,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805330479] [2021-11-09 08:30:43,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:43,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:43,177 INFO L87 Difference]: Start difference. First operand 5973 states and 9179 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:43,454 INFO L93 Difference]: Finished difference Result 12889 states and 19933 transitions. [2021-11-09 08:30:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:43,479 INFO L225 Difference]: With dead ends: 12889 [2021-11-09 08:30:43,479 INFO L226 Difference]: Without dead ends: 9239 [2021-11-09 08:30:43,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9239 states. [2021-11-09 08:30:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9239 to 9237. [2021-11-09 08:30:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9235 states have (on average 1.534488359501895) internal successors, (14171), 9236 states have internal predecessors, (14171), 0 states have call successors, (0), 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 08:30:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 14171 transitions. [2021-11-09 08:30:44,009 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 14171 transitions. Word has length 106 [2021-11-09 08:30:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:44,009 INFO L470 AbstractCegarLoop]: Abstraction has 9237 states and 14171 transitions. [2021-11-09 08:30:44,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 14171 transitions. [2021-11-09 08:30:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:30:44,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:44,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:44,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:30:44,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-11-09 08:30:44,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:44,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014668135] [2021-11-09 08:30:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:44,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,183 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 08:30:44,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:44,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014668135] [2021-11-09 08:30:44,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014668135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:44,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:44,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 08:30:44,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72434850] [2021-11-09 08:30:44,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:44,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:44,189 INFO L87 Difference]: Start difference. First operand 9237 states and 14171 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,135 INFO L93 Difference]: Finished difference Result 119861 states and 185195 transitions. [2021-11-09 08:30:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:30:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:30:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,459 INFO L225 Difference]: With dead ends: 119861 [2021-11-09 08:30:48,459 INFO L226 Difference]: Without dead ends: 112947 [2021-11-09 08:30:48,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:30:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2021-11-09 08:30:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 16149. [2021-11-09 08:30:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16149 states, 16147 states have (on average 1.5236886108874714) internal successors, (24603), 16148 states have internal predecessors, (24603), 0 states have call successors, (0), 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 08:30:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 24603 transitions. [2021-11-09 08:30:50,779 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 24603 transitions. Word has length 106 [2021-11-09 08:30:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 16149 states and 24603 transitions. [2021-11-09 08:30:50,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 24603 transitions. [2021-11-09 08:30:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-09 08:30:50,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:50,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:50,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:30:50,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2021-11-09 08:30:50,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:50,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402513740] [2021-11-09 08:30:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,853 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 08:30:50,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:50,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402513740] [2021-11-09 08:30:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402513740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:50,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:50,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:50,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313664060] [2021-11-09 08:30:50,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:50,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:50,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:50,856 INFO L87 Difference]: Start difference. First operand 16149 states and 24603 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 08:30:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:52,310 INFO L93 Difference]: Finished difference Result 42393 states and 64413 transitions. [2021-11-09 08:30:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-09 08:30:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:52,370 INFO L225 Difference]: With dead ends: 42393 [2021-11-09 08:30:52,370 INFO L226 Difference]: Without dead ends: 28567 [2021-11-09 08:30:52,389 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 08:30:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28567 states. [2021-11-09 08:30:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28567 to 28309. [2021-11-09 08:30:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28307 states have (on average 1.4976860847140283) internal successors, (42395), 28308 states have internal predecessors, (42395), 0 states have call successors, (0), 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 08:30:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42395 transitions. [2021-11-09 08:30:54,122 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42395 transitions. Word has length 108 [2021-11-09 08:30:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:54,123 INFO L470 AbstractCegarLoop]: Abstraction has 28309 states and 42395 transitions. [2021-11-09 08:30:54,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 08:30:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42395 transitions. [2021-11-09 08:30:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-09 08:30:54,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:54,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:54,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:30:54,126 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2021-11-09 08:30:54,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:54,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159716847] [2021-11-09 08:30:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,530 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 08:30:54,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159716847] [2021-11-09 08:30:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159716847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:54,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:54,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 08:30:54,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706489363] [2021-11-09 08:30:54,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:54,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:54,534 INFO L87 Difference]: Start difference. First operand 28309 states and 42395 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 08:30:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:56,282 INFO L93 Difference]: Finished difference Result 54297 states and 81309 transitions. [2021-11-09 08:30:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-09 08:30:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:56,347 INFO L225 Difference]: With dead ends: 54297 [2021-11-09 08:30:56,347 INFO L226 Difference]: Without dead ends: 28311 [2021-11-09 08:30:56,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28311 states. [2021-11-09 08:30:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28311 to 28309. [2021-11-09 08:30:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28307 states have (on average 1.488642385275727) internal successors, (42139), 28308 states have internal predecessors, (42139), 0 states have call successors, (0), 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 08:30:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42139 transitions. [2021-11-09 08:30:58,002 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42139 transitions. Word has length 108 [2021-11-09 08:30:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:58,003 INFO L470 AbstractCegarLoop]: Abstraction has 28309 states and 42139 transitions. [2021-11-09 08:30:58,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 08:30:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42139 transitions. [2021-11-09 08:30:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 08:30:58,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:58,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:58,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:30:58,006 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:58,007 INFO L85 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2021-11-09 08:30:58,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:58,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536859763] [2021-11-09 08:30:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:58,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,116 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 08:30:58,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:58,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536859763] [2021-11-09 08:30:58,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536859763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:58,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:58,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:30:58,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983802070] [2021-11-09 08:30:58,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:30:58,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:30:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:58,119 INFO L87 Difference]: Start difference. First operand 28309 states and 42139 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 08:30:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:59,673 INFO L93 Difference]: Finished difference Result 54295 states and 80796 transitions. [2021-11-09 08:30:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:30:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-09 08:30:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:59,720 INFO L225 Difference]: With dead ends: 54295 [2021-11-09 08:30:59,720 INFO L226 Difference]: Without dead ends: 28309 [2021-11-09 08:30:59,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28309 states. [2021-11-09 08:31:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28309 to 28309. [2021-11-09 08:31:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28307 states have (on average 1.4795986858374253) internal successors, (41883), 28308 states have internal predecessors, (41883), 0 states have call successors, (0), 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 08:31:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 41883 transitions. [2021-11-09 08:31:01,541 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 41883 transitions. Word has length 109 [2021-11-09 08:31:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:01,541 INFO L470 AbstractCegarLoop]: Abstraction has 28309 states and 41883 transitions. [2021-11-09 08:31:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 08:31:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 41883 transitions. [2021-11-09 08:31:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 08:31:01,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:01,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:01,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:31:01,546 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-11-09 08:31:01,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:01,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157982377] [2021-11-09 08:31:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:01,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,654 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 08:31:01,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:01,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157982377] [2021-11-09 08:31:01,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157982377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:01,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:31:01,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367536813] [2021-11-09 08:31:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:31:01,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:31:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:01,657 INFO L87 Difference]: Start difference. First operand 28309 states and 41883 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 08:31:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:04,573 INFO L93 Difference]: Finished difference Result 47679 states and 70096 transitions. [2021-11-09 08:31:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:31:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-09 08:31:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:04,641 INFO L225 Difference]: With dead ends: 47679 [2021-11-09 08:31:04,642 INFO L226 Difference]: Without dead ends: 47677 [2021-11-09 08:31:04,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:31:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47677 states. [2021-11-09 08:31:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47677 to 29077. [2021-11-09 08:31:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29077 states, 29075 states have (on average 1.4625279449699053) internal successors, (42523), 29076 states have internal predecessors, (42523), 0 states have call successors, (0), 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 08:31:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29077 states to 29077 states and 42523 transitions. [2021-11-09 08:31:06,524 INFO L78 Accepts]: Start accepts. Automaton has 29077 states and 42523 transitions. Word has length 109 [2021-11-09 08:31:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 29077 states and 42523 transitions. [2021-11-09 08:31:06,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 08:31:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 29077 states and 42523 transitions. [2021-11-09 08:31:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 08:31:06,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:06,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:06,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:31:06,529 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2021-11-09 08:31:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551258986] [2021-11-09 08:31:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:06,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:06,582 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 08:31:06,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:06,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551258986] [2021-11-09 08:31:06,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551258986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:06,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:06,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:06,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136791983] [2021-11-09 08:31:06,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:06,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:06,585 INFO L87 Difference]: Start difference. First operand 29077 states and 42523 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 08:31:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:09,440 INFO L93 Difference]: Finished difference Result 56220 states and 82465 transitions. [2021-11-09 08:31:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-09 08:31:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:09,492 INFO L225 Difference]: With dead ends: 56220 [2021-11-09 08:31:09,492 INFO L226 Difference]: Without dead ends: 41625 [2021-11-09 08:31:09,507 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 08:31:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41625 states. [2021-11-09 08:31:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41625 to 41623. [2021-11-09 08:31:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41623 states, 41621 states have (on average 1.4553470603781744) internal successors, (60573), 41622 states have internal predecessors, (60573), 0 states have call successors, (0), 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 08:31:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60573 transitions. [2021-11-09 08:31:12,479 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60573 transitions. Word has length 110 [2021-11-09 08:31:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:12,479 INFO L470 AbstractCegarLoop]: Abstraction has 41623 states and 60573 transitions. [2021-11-09 08:31:12,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 08:31:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60573 transitions. [2021-11-09 08:31:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 08:31:12,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:12,483 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:31:12,483 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 503651475, now seen corresponding path program 1 times [2021-11-09 08:31:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:12,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400325629] [2021-11-09 08:31:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:12,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400325629] [2021-11-09 08:31:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400325629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:12,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:12,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:12,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108349543] [2021-11-09 08:31:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:12,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:12,586 INFO L87 Difference]: Start difference. First operand 41623 states and 60573 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 08:31:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:19,490 INFO L93 Difference]: Finished difference Result 45417 states and 66678 transitions. [2021-11-09 08:31:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-09 08:31:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:19,529 INFO L225 Difference]: With dead ends: 45417 [2021-11-09 08:31:19,529 INFO L226 Difference]: Without dead ends: 43125 [2021-11-09 08:31:19,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2021-11-09 08:31:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2021-11-09 08:31:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43125 states, 43123 states have (on average 1.4414117756185794) internal successors, (62158), 43124 states have internal predecessors, (62158), 0 states have call successors, (0), 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 08:31:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62158 transitions. [2021-11-09 08:31:22,098 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62158 transitions. Word has length 131 [2021-11-09 08:31:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 43125 states and 62158 transitions. [2021-11-09 08:31:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 08:31:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62158 transitions. [2021-11-09 08:31:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-09 08:31:22,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:22,118 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:22,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:31:22,119 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2021-11-09 08:31:22,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:22,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662893425] [2021-11-09 08:31:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:22,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:31:22,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:22,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662893425] [2021-11-09 08:31:22,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662893425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:22,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:22,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 08:31:22,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362372322] [2021-11-09 08:31:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:22,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:22,454 INFO L87 Difference]: Start difference. First operand 43125 states and 62158 transitions. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)