./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU --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 64bit --witnessprinter.graph.data.programhash 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:11:57,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:11:57,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:11:57,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:11:57,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:11:57,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:11:57,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:11:57,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:11:57,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:11:57,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:11:57,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:11:57,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:11:57,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:11:57,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:11:57,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:11:57,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:11:57,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:11:57,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:11:57,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:11:57,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:11:57,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:11:57,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:11:57,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:11:57,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:11:57,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:11:57,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:11:57,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:11:57,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:11:57,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:11:57,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:11:57,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:11:57,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:11:57,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:11:57,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:11:57,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:11:57,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:11:57,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:11:57,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:11:57,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:11:57,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:11:57,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:11:57,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 22:11:57,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:11:57,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:11:57,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:11:57,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:11:57,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:11:57,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:11:57,581 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:11:57,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:11:57,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:11:57,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:11:57,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:11:57,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:11:57,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:11:57,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:11:57,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:11:57,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:11:57,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:11:57,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:11:57,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:11:57,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:11:57,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:11:57,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:11:57,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:11:57,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:11:57,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:11:57,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:11:57,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:11:57,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:11:57,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:11:57,586 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_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d [2021-11-02 22:11:57,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:11:57,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:11:57,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:11:57,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:11:57,900 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:11:57,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-02 22:11:57,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/data/283ad52a6/6cac3399ab5a4c3eb9a7389c8e630743/FLAG55c874d19 [2021-11-02 22:11:58,910 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:11:58,913 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-02 22:11:58,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/data/283ad52a6/6cac3399ab5a4c3eb9a7389c8e630743/FLAG55c874d19 [2021-11-02 22:11:59,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/data/283ad52a6/6cac3399ab5a4c3eb9a7389c8e630743 [2021-11-02 22:11:59,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:11:59,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:11:59,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:11:59,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:11:59,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:11:59,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:11:59" (1/1) ... [2021-11-02 22:11:59,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477a4237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:11:59, skipping insertion in model container [2021-11-02 22:11:59,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:11:59" (1/1) ... [2021-11-02 22:11:59,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:11:59,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:12:00,755 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_66b6025b-5d4a-457e-b51e-9948f3260301/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-02 22:12:01,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:12:01,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:12:02,100 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_66b6025b-5d4a-457e-b51e-9948f3260301/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-02 22:12:02,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:12:02,381 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:12:02,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02 WrapperNode [2021-11-02 22:12:02,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:12:02,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:12:02,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:12:02,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:12:02,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:02,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:02,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:12:02,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:12:02,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:12:02,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:12:02,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:02,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:12:03,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:12:03,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:12:03,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:12:03,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (1/1) ... [2021-11-02 22:12:03,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:12:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:03,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:12:03,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:12:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 22:12:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 22:12:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_init_dvb [2021-11-02 22:12:03,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_init_dvb [2021-11-02 22:12:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-02 22:12:03,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-02 22:12:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_sec_feed [2021-11-02 22:12:03,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_sec_feed [2021-11-02 22:12:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2021-11-02 22:12:03,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2021-11-02 22:12:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_process_urb [2021-11-02 22:12:03,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_process_urb [2021-11-02 22:12:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:12:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:12:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_feed [2021-11-02 22:12:03,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_feed [2021-11-02 22:12:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:12:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:12:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_probe [2021-11-02 22:12:03,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_probe [2021-11-02 22:12:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_ts_feed [2021-11-02 22:12:03,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_ts_feed [2021-11-02 22:12:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_dvb [2021-11-02 22:12:03,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_dvb [2021-11-02 22:12:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 22:12:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 22:12:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-02 22:12:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-02 22:12:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-11-02 22:12:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-11-02 22:12:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-02 22:12:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-02 22:12:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-02 22:12:03,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-02 22:12:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:12:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:12:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:12:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:12:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:12:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:12:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-02 22:12:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-02 22:12:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_init_rc [2021-11-02 22:12:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_init_rc [2021-11-02 22:12:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 22:12:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 22:12:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_disconnect [2021-11-02 22:12:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_disconnect [2021-11-02 22:12:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_handle_irq [2021-11-02 22:12:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_handle_irq [2021-11-02 22:12:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:12:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:12:03,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:12:29,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:12:29,311 INFO L299 CfgBuilder]: Removed 1159 assume(true) statements. [2021-11-02 22:12:29,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:12:29 BoogieIcfgContainer [2021-11-02 22:12:29,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:12:29,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:12:29,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:12:29,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:12:29,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:11:59" (1/3) ... [2021-11-02 22:12:29,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c65f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:12:29, skipping insertion in model container [2021-11-02 22:12:29,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:02" (2/3) ... [2021-11-02 22:12:29,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c65f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:12:29, skipping insertion in model container [2021-11-02 22:12:29,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:12:29" (3/3) ... [2021-11-02 22:12:29,325 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-02 22:12:29,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:12:29,331 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-02 22:12:29,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:12:29,396 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 [2021-11-02 22:12:29,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-02 22:12:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 1556 states, 1500 states have (on average 1.4353333333333333) internal successors, (2153), 1508 states have internal predecessors, (2153), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 22:12:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:12:29,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:29,450 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] [2021-11-02 22:12:29,450 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1596431133, now seen corresponding path program 1 times [2021-11-02 22:12:29,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:29,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679305732] [2021-11-02 22:12:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:29,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:30,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:30,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679305732] [2021-11-02 22:12:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679305732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:30,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:30,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:12:30,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939323563] [2021-11-02 22:12:30,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:30,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:30,341 INFO L87 Difference]: Start difference. First operand has 1556 states, 1500 states have (on average 1.4353333333333333) internal successors, (2153), 1508 states have internal predecessors, (2153), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:30,593 INFO L93 Difference]: Finished difference Result 3108 states and 4456 transitions. [2021-11-02 22:12:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-02 22:12:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:30,631 INFO L225 Difference]: With dead ends: 3108 [2021-11-02 22:12:30,632 INFO L226 Difference]: Without dead ends: 1544 [2021-11-02 22:12:30,649 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 [2021-11-02 22:12:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-02 22:12:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2021-11-02 22:12:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1489 states have (on average 1.4083277367360645) internal successors, (2097), 1496 states have internal predecessors, (2097), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 22:12:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2159 transitions. [2021-11-02 22:12:30,820 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2159 transitions. Word has length 25 [2021-11-02 22:12:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:30,821 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 2159 transitions. [2021-11-02 22:12:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2159 transitions. [2021-11-02 22:12:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:12:30,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:30,824 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] [2021-11-02 22:12:30,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:12:30,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 749935913, now seen corresponding path program 1 times [2021-11-02 22:12:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:30,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130791419] [2021-11-02 22:12:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:30,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:31,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:31,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130791419] [2021-11-02 22:12:31,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130791419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:31,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:31,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:12:31,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484582086] [2021-11-02 22:12:31,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:31,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:31,168 INFO L87 Difference]: Start difference. First operand 1544 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:33,650 INFO L93 Difference]: Finished difference Result 4543 states and 6375 transitions. [2021-11-02 22:12:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-02 22:12:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:33,677 INFO L225 Difference]: With dead ends: 4543 [2021-11-02 22:12:33,677 INFO L226 Difference]: Without dead ends: 3030 [2021-11-02 22:12:33,685 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 [2021-11-02 22:12:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-11-02 22:12:33,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3030. [2021-11-02 22:12:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 2925 states have (on average 1.4105982905982906) internal successors, (4126), 2935 states have internal predecessors, (4126), 62 states have call successors, (62), 38 states have call predecessors, (62), 38 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-11-02 22:12:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 4250 transitions. [2021-11-02 22:12:33,821 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 4250 transitions. Word has length 26 [2021-11-02 22:12:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:33,821 INFO L470 AbstractCegarLoop]: Abstraction has 3030 states and 4250 transitions. [2021-11-02 22:12:33,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 4250 transitions. [2021-11-02 22:12:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:12:33,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:33,824 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] [2021-11-02 22:12:33,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:12:33,825 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash 393012970, now seen corresponding path program 1 times [2021-11-02 22:12:33,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:33,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258203431] [2021-11-02 22:12:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:33,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:34,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:34,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258203431] [2021-11-02 22:12:34,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258203431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:34,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:34,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:12:34,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126492139] [2021-11-02 22:12:34,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:34,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:34,079 INFO L87 Difference]: Start difference. First operand 3030 states and 4250 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:34,237 INFO L93 Difference]: Finished difference Result 3060 states and 4278 transitions. [2021-11-02 22:12:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-02 22:12:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:34,260 INFO L225 Difference]: With dead ends: 3060 [2021-11-02 22:12:34,260 INFO L226 Difference]: Without dead ends: 3045 [2021-11-02 22:12:34,263 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 [2021-11-02 22:12:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-11-02 22:12:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 3030. [2021-11-02 22:12:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 2925 states have (on average 1.4102564102564104) internal successors, (4125), 2935 states have internal predecessors, (4125), 62 states have call successors, (62), 38 states have call predecessors, (62), 38 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-11-02 22:12:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 4249 transitions. [2021-11-02 22:12:34,410 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 4249 transitions. Word has length 33 [2021-11-02 22:12:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 3030 states and 4249 transitions. [2021-11-02 22:12:34,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 4249 transitions. [2021-11-02 22:12:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:12:34,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:34,413 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] [2021-11-02 22:12:34,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:12:34,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 393072552, now seen corresponding path program 1 times [2021-11-02 22:12:34,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:34,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935195928] [2021-11-02 22:12:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:34,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:34,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935195928] [2021-11-02 22:12:34,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935195928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:34,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:34,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:34,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804421891] [2021-11-02 22:12:34,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:34,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:34,930 INFO L87 Difference]: Start difference. First operand 3030 states and 4249 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:35,297 INFO L93 Difference]: Finished difference Result 9026 states and 12920 transitions. [2021-11-02 22:12:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-02 22:12:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:35,351 INFO L225 Difference]: With dead ends: 9026 [2021-11-02 22:12:35,351 INFO L226 Difference]: Without dead ends: 6027 [2021-11-02 22:12:35,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6027 states. [2021-11-02 22:12:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6027 to 6015. [2021-11-02 22:12:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 5810 states have (on average 1.4096385542168675) internal successors, (8190), 5826 states have internal predecessors, (8190), 124 states have call successors, (124), 76 states have call predecessors, (124), 76 states have return successors, (248), 116 states have call predecessors, (248), 124 states have call successors, (248) [2021-11-02 22:12:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 8562 transitions. [2021-11-02 22:12:35,830 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 8562 transitions. Word has length 33 [2021-11-02 22:12:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 6015 states and 8562 transitions. [2021-11-02 22:12:35,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 8562 transitions. [2021-11-02 22:12:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:12:35,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:35,834 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] [2021-11-02 22:12:35,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:12:35,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash -699649290, now seen corresponding path program 1 times [2021-11-02 22:12:35,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:35,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011856494] [2021-11-02 22:12:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:35,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:36,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:36,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011856494] [2021-11-02 22:12:36,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011856494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:36,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:36,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:36,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874267511] [2021-11-02 22:12:36,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:36,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:36,227 INFO L87 Difference]: Start difference. First operand 6015 states and 8562 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:36,432 INFO L93 Difference]: Finished difference Result 6015 states and 8562 transitions. [2021-11-02 22:12:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 22:12:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:36,481 INFO L225 Difference]: With dead ends: 6015 [2021-11-02 22:12:36,481 INFO L226 Difference]: Without dead ends: 6013 [2021-11-02 22:12:36,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2021-11-02 22:12:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 6013. [2021-11-02 22:12:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 5809 states have (on average 1.4095369254604924) internal successors, (8188), 5824 states have internal predecessors, (8188), 124 states have call successors, (124), 76 states have call predecessors, (124), 76 states have return successors, (248), 116 states have call predecessors, (248), 124 states have call successors, (248) [2021-11-02 22:12:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 8560 transitions. [2021-11-02 22:12:36,808 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 8560 transitions. Word has length 34 [2021-11-02 22:12:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:36,809 INFO L470 AbstractCegarLoop]: Abstraction has 6013 states and 8560 transitions. [2021-11-02 22:12:36,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 8560 transitions. [2021-11-02 22:12:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:12:36,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:36,811 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] [2021-11-02 22:12:36,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:12:36,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash -214288014, now seen corresponding path program 1 times [2021-11-02 22:12:36,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:36,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414457740] [2021-11-02 22:12:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:36,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:37,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:37,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414457740] [2021-11-02 22:12:37,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414457740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:37,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:37,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:37,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301726975] [2021-11-02 22:12:37,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:37,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:37,091 INFO L87 Difference]: Start difference. First operand 6013 states and 8560 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:37,379 INFO L93 Difference]: Finished difference Result 6013 states and 8560 transitions. [2021-11-02 22:12:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:37,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:12:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:37,438 INFO L225 Difference]: With dead ends: 6013 [2021-11-02 22:12:37,439 INFO L226 Difference]: Without dead ends: 6011 [2021-11-02 22:12:37,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-11-02 22:12:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 6011. [2021-11-02 22:12:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 5808 states have (on average 1.409435261707989) internal successors, (8186), 5822 states have internal predecessors, (8186), 124 states have call successors, (124), 76 states have call predecessors, (124), 76 states have return successors, (248), 116 states have call predecessors, (248), 124 states have call successors, (248) [2021-11-02 22:12:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 8558 transitions. [2021-11-02 22:12:37,792 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 8558 transitions. Word has length 35 [2021-11-02 22:12:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:37,793 INFO L470 AbstractCegarLoop]: Abstraction has 6011 states and 8558 transitions. [2021-11-02 22:12:37,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 8558 transitions. [2021-11-02 22:12:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:12:37,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:37,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:37,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:12:37,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1947009664, now seen corresponding path program 1 times [2021-11-02 22:12:37,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:37,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72447799] [2021-11-02 22:12:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:37,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:38,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:38,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72447799] [2021-11-02 22:12:38,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72447799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:38,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:38,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:38,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082010393] [2021-11-02 22:12:38,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:38,055 INFO L87 Difference]: Start difference. First operand 6011 states and 8558 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:38,284 INFO L93 Difference]: Finished difference Result 6011 states and 8558 transitions. [2021-11-02 22:12:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 22:12:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:38,321 INFO L225 Difference]: With dead ends: 6011 [2021-11-02 22:12:38,322 INFO L226 Difference]: Without dead ends: 6009 [2021-11-02 22:12:38,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6009 states. [2021-11-02 22:12:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6009 to 6009. [2021-11-02 22:12:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 5807 states have (on average 1.4093335629412778) internal successors, (8184), 5820 states have internal predecessors, (8184), 124 states have call successors, (124), 76 states have call predecessors, (124), 76 states have return successors, (248), 116 states have call predecessors, (248), 124 states have call successors, (248) [2021-11-02 22:12:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 8556 transitions. [2021-11-02 22:12:38,718 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 8556 transitions. Word has length 36 [2021-11-02 22:12:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 6009 states and 8556 transitions. [2021-11-02 22:12:38,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 8556 transitions. [2021-11-02 22:12:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:12:38,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:38,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:12:38,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash 227760956, now seen corresponding path program 1 times [2021-11-02 22:12:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:38,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112375794] [2021-11-02 22:12:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:38,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:38,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112375794] [2021-11-02 22:12:38,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112375794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:38,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:38,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:38,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315003462] [2021-11-02 22:12:38,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:12:38,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:12:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:38,987 INFO L87 Difference]: Start difference. First operand 6009 states and 8556 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:39,210 INFO L93 Difference]: Finished difference Result 6009 states and 8556 transitions. [2021-11-02 22:12:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:12:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:12:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:39,248 INFO L225 Difference]: With dead ends: 6009 [2021-11-02 22:12:39,248 INFO L226 Difference]: Without dead ends: 6000 [2021-11-02 22:12:39,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:12:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2021-11-02 22:12:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 6000. [2021-11-02 22:12:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5799 states have (on average 1.409380927746163) internal successors, (8173), 5811 states have internal predecessors, (8173), 124 states have call successors, (124), 76 states have call predecessors, (124), 76 states have return successors, (248), 116 states have call predecessors, (248), 124 states have call successors, (248) [2021-11-02 22:12:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 8545 transitions. [2021-11-02 22:12:39,569 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 8545 transitions. Word has length 37 [2021-11-02 22:12:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:39,570 INFO L470 AbstractCegarLoop]: Abstraction has 6000 states and 8545 transitions. [2021-11-02 22:12:39,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 8545 transitions. [2021-11-02 22:12:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:12:39,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:39,575 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:12:39,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:12:39,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1031632269, now seen corresponding path program 1 times [2021-11-02 22:12:39,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:39,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547708681] [2021-11-02 22:12:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:39,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:39,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-02 22:12:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:39,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547708681] [2021-11-02 22:12:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547708681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:39,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:39,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:12:39,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80419524] [2021-11-02 22:12:39,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:12:39,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:12:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:12:39,925 INFO L87 Difference]: Start difference. First operand 6000 states and 8545 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:12:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:58,257 INFO L93 Difference]: Finished difference Result 12579 states and 18199 transitions. [2021-11-02 22:12:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:12:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-11-02 22:12:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:58,305 INFO L225 Difference]: With dead ends: 12579 [2021-11-02 22:12:58,305 INFO L226 Difference]: Without dead ends: 6610 [2021-11-02 22:12:58,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:12:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2021-11-02 22:12:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6562. [2021-11-02 22:12:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6562 states, 6289 states have (on average 1.3986325329941167) internal successors, (8796), 6325 states have internal predecessors, (8796), 136 states have call successors, (136), 76 states have call predecessors, (136), 136 states have return successors, (388), 164 states have call predecessors, (388), 136 states have call successors, (388) [2021-11-02 22:12:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6562 states to 6562 states and 9320 transitions. [2021-11-02 22:12:58,733 INFO L78 Accepts]: Start accepts. Automaton has 6562 states and 9320 transitions. Word has length 83 [2021-11-02 22:12:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:58,733 INFO L470 AbstractCegarLoop]: Abstraction has 6562 states and 9320 transitions. [2021-11-02 22:12:58,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:12:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6562 states and 9320 transitions. [2021-11-02 22:12:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:12:58,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:58,739 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:12:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:12:58,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:12:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash -679954352, now seen corresponding path program 1 times [2021-11-02 22:12:58,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:58,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337607293] [2021-11-02 22:12:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:58,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:59,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:12:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:12:59,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:59,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337607293] [2021-11-02 22:12:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337607293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:59,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:59,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:12:59,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386998286] [2021-11-02 22:12:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:12:59,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:12:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:12:59,291 INFO L87 Difference]: Start difference. First operand 6562 states and 9320 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:13:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:30,759 INFO L93 Difference]: Finished difference Result 18845 states and 27497 transitions. [2021-11-02 22:13:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:13:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-11-02 22:13:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:30,802 INFO L225 Difference]: With dead ends: 18845 [2021-11-02 22:13:30,803 INFO L226 Difference]: Without dead ends: 6322 [2021-11-02 22:13:30,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:13:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6322 states. [2021-11-02 22:13:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6322 to 6282. [2021-11-02 22:13:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6282 states, 6009 states have (on average 1.3399900149775337) internal successors, (8052), 6045 states have internal predecessors, (8052), 136 states have call successors, (136), 76 states have call predecessors, (136), 136 states have return successors, (388), 164 states have call predecessors, (388), 136 states have call successors, (388) [2021-11-02 22:13:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6282 states to 6282 states and 8576 transitions. [2021-11-02 22:13:31,176 INFO L78 Accepts]: Start accepts. Automaton has 6282 states and 8576 transitions. Word has length 92 [2021-11-02 22:13:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:31,177 INFO L470 AbstractCegarLoop]: Abstraction has 6282 states and 8576 transitions. [2021-11-02 22:13:31,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:13:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6282 states and 8576 transitions. [2021-11-02 22:13:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:13:31,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:31,181 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:13:31,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:13:31,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:13:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash -647940848, now seen corresponding path program 1 times [2021-11-02 22:13:31,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:31,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670094469] [2021-11-02 22:13:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:31,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:31,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:13:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:13:31,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:31,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670094469] [2021-11-02 22:13:31,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670094469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:31,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:31,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:13:31,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784809093] [2021-11-02 22:13:31,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:13:31,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:13:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:13:31,455 INFO L87 Difference]: Start difference. First operand 6282 states and 8576 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:13:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:49,802 INFO L93 Difference]: Finished difference Result 14537 states and 20197 transitions. [2021-11-02 22:13:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:13:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-11-02 22:13:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:49,839 INFO L225 Difference]: With dead ends: 14537 [2021-11-02 22:13:49,839 INFO L226 Difference]: Without dead ends: 8286 [2021-11-02 22:13:49,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:13:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2021-11-02 22:13:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 6282. [2021-11-02 22:13:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6282 states, 6009 states have (on average 1.3386586786486936) internal successors, (8044), 6045 states have internal predecessors, (8044), 136 states have call successors, (136), 76 states have call predecessors, (136), 136 states have return successors, (388), 164 states have call predecessors, (388), 136 states have call successors, (388) [2021-11-02 22:13:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6282 states to 6282 states and 8568 transitions. [2021-11-02 22:13:50,199 INFO L78 Accepts]: Start accepts. Automaton has 6282 states and 8568 transitions. Word has length 92 [2021-11-02 22:13:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 6282 states and 8568 transitions. [2021-11-02 22:13:50,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:13:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6282 states and 8568 transitions. [2021-11-02 22:13:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:13:50,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:50,211 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:13:50,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:13:50,212 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:13:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 84660165, now seen corresponding path program 1 times [2021-11-02 22:13:50,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:50,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60906946] [2021-11-02 22:13:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:50,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:13:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:13:50,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:50,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60906946] [2021-11-02 22:13:50,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60906946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:50,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:50,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:13:50,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863298978] [2021-11-02 22:13:50,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:13:50,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:50,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:13:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:13:50,604 INFO L87 Difference]: Start difference. First operand 6282 states and 8568 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:18,579 INFO L93 Difference]: Finished difference Result 18337 states and 25793 transitions. [2021-11-02 22:14:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:14:18,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-11-02 22:14:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:18,613 INFO L225 Difference]: With dead ends: 18337 [2021-11-02 22:14:18,614 INFO L226 Difference]: Without dead ends: 6650 [2021-11-02 22:14:18,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:14:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2021-11-02 22:14:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6390. [2021-11-02 22:14:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6057 states have (on average 1.3359749050685157) internal successors, (8092), 6101 states have internal predecessors, (8092), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:14:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 8752 transitions. [2021-11-02 22:14:19,113 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 8752 transitions. Word has length 92 [2021-11-02 22:14:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 6390 states and 8752 transitions. [2021-11-02 22:14:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 8752 transitions. [2021-11-02 22:14:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 22:14:19,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:19,124 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:14:19,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:14:19,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:14:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1393243720, now seen corresponding path program 1 times [2021-11-02 22:14:19,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:19,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131134261] [2021-11-02 22:14:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:19,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:19,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:14:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:14:19,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:19,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131134261] [2021-11-02 22:14:19,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131134261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:19,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:19,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:14:19,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656072351] [2021-11-02 22:14:19,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:14:19,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:14:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:19,492 INFO L87 Difference]: Start difference. First operand 6390 states and 8752 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:36,717 INFO L93 Difference]: Finished difference Result 12985 states and 18175 transitions. [2021-11-02 22:14:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-11-02 22:14:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:36,753 INFO L225 Difference]: With dead ends: 12985 [2021-11-02 22:14:36,753 INFO L226 Difference]: Without dead ends: 6626 [2021-11-02 22:14:36,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-11-02 22:14:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 6394. [2021-11-02 22:14:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6061 states have (on average 1.3357531760435573) internal successors, (8096), 6105 states have internal predecessors, (8096), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:14:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 8756 transitions. [2021-11-02 22:14:37,219 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 8756 transitions. Word has length 120 [2021-11-02 22:14:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 6394 states and 8756 transitions. [2021-11-02 22:14:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 8756 transitions. [2021-11-02 22:14:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 22:14:37,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:37,229 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:14:37,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:14:37,230 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:14:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:37,231 INFO L85 PathProgramCache]: Analyzing trace with hash 460476387, now seen corresponding path program 1 times [2021-11-02 22:14:37,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:37,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822293489] [2021-11-02 22:14:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:37,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:14:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:14:37,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:37,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822293489] [2021-11-02 22:14:37,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822293489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:37,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:14:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412000686] [2021-11-02 22:14:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:14:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:14:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:37,594 INFO L87 Difference]: Start difference. First operand 6394 states and 8756 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:52,225 INFO L93 Difference]: Finished difference Result 12985 states and 18171 transitions. [2021-11-02 22:14:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-11-02 22:14:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:52,257 INFO L225 Difference]: With dead ends: 12985 [2021-11-02 22:14:52,258 INFO L226 Difference]: Without dead ends: 6622 [2021-11-02 22:14:52,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2021-11-02 22:14:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 6398. [2021-11-02 22:14:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 6065 states have (on average 1.3355317394888706) internal successors, (8100), 6109 states have internal predecessors, (8100), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:14:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 8760 transitions. [2021-11-02 22:14:52,698 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 8760 transitions. Word has length 123 [2021-11-02 22:14:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:52,698 INFO L470 AbstractCegarLoop]: Abstraction has 6398 states and 8760 transitions. [2021-11-02 22:14:52,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:14:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 8760 transitions. [2021-11-02 22:14:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 22:14:52,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:52,711 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:14:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:14:52,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:14:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 251661759, now seen corresponding path program 1 times [2021-11-02 22:14:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:52,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770826203] [2021-11-02 22:14:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:52,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:14:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:14:53,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:53,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770826203] [2021-11-02 22:14:53,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770826203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:53,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:53,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:14:53,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407596325] [2021-11-02 22:14:53,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:14:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:14:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:14:53,088 INFO L87 Difference]: Start difference. First operand 6398 states and 8760 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:11,549 INFO L93 Difference]: Finished difference Result 14549 states and 20381 transitions. [2021-11-02 22:15:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:15:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-11-02 22:15:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:11,588 INFO L225 Difference]: With dead ends: 14549 [2021-11-02 22:15:11,588 INFO L226 Difference]: Without dead ends: 8182 [2021-11-02 22:15:11,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:15:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-11-02 22:15:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 6410. [2021-11-02 22:15:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6077 states have (on average 1.3348691788711535) internal successors, (8112), 6121 states have internal predecessors, (8112), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:15:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 8772 transitions. [2021-11-02 22:15:11,995 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 8772 transitions. Word has length 125 [2021-11-02 22:15:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:11,996 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 8772 transitions. [2021-11-02 22:15:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 8772 transitions. [2021-11-02 22:15:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-02 22:15:12,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:12,009 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:12,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:15:12,009 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:15:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash -360768551, now seen corresponding path program 1 times [2021-11-02 22:15:12,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:12,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140974919] [2021-11-02 22:15:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:12,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:12,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:15:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:15:12,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:12,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140974919] [2021-11-02 22:15:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140974919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:15:12,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:15:12,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:15:12,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45700230] [2021-11-02 22:15:12,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:15:12,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:15:12,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:12,371 INFO L87 Difference]: Start difference. First operand 6410 states and 8772 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:27,990 INFO L93 Difference]: Finished difference Result 13041 states and 18235 transitions. [2021-11-02 22:15:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:15:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-11-02 22:15:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:28,020 INFO L225 Difference]: With dead ends: 13041 [2021-11-02 22:15:28,020 INFO L226 Difference]: Without dead ends: 6662 [2021-11-02 22:15:28,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2021-11-02 22:15:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 6418. [2021-11-02 22:15:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6085 states have (on average 1.3344289235825801) internal successors, (8120), 6129 states have internal predecessors, (8120), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:15:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 8780 transitions. [2021-11-02 22:15:28,416 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 8780 transitions. Word has length 137 [2021-11-02 22:15:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 6418 states and 8780 transitions. [2021-11-02 22:15:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 8780 transitions. [2021-11-02 22:15:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 22:15:28,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:28,429 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:28,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:15:28,430 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:15:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1766722050, now seen corresponding path program 1 times [2021-11-02 22:15:28,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:28,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56994275] [2021-11-02 22:15:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:28,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:15:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:15:28,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:28,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56994275] [2021-11-02 22:15:28,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56994275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:15:28,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:15:28,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:15:28,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225295955] [2021-11-02 22:15:28,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:15:28,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:15:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:28,786 INFO L87 Difference]: Start difference. First operand 6418 states and 8780 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:43,998 INFO L93 Difference]: Finished difference Result 13029 states and 18215 transitions. [2021-11-02 22:15:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:15:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-11-02 22:15:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:44,034 INFO L225 Difference]: With dead ends: 13029 [2021-11-02 22:15:44,035 INFO L226 Difference]: Without dead ends: 6642 [2021-11-02 22:15:44,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6642 states. [2021-11-02 22:15:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6642 to 6422. [2021-11-02 22:15:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6422 states, 6089 states have (on average 1.334209229758581) internal successors, (8124), 6133 states have internal predecessors, (8124), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:15:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6422 states to 6422 states and 8784 transitions. [2021-11-02 22:15:44,443 INFO L78 Accepts]: Start accepts. Automaton has 6422 states and 8784 transitions. Word has length 141 [2021-11-02 22:15:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:44,443 INFO L470 AbstractCegarLoop]: Abstraction has 6422 states and 8784 transitions. [2021-11-02 22:15:44,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:15:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6422 states and 8784 transitions. [2021-11-02 22:15:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 22:15:44,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:44,456 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:44,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:15:44,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:15:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1377699604, now seen corresponding path program 1 times [2021-11-02 22:15:44,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:44,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134780440] [2021-11-02 22:15:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:44,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:44,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:15:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:15:44,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:44,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134780440] [2021-11-02 22:15:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134780440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:44,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598007618] [2021-11-02 22:15:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:44,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:44,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:44,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:15:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:15:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:15:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598007618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:46,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:46,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-02 22:15:46,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049703364] [2021-11-02 22:15:46,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:15:46,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:15:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:15:46,601 INFO L87 Difference]: Start difference. First operand 6422 states and 8784 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:16:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:02,535 INFO L93 Difference]: Finished difference Result 13037 states and 18223 transitions. [2021-11-02 22:16:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:16:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-11-02 22:16:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:02,562 INFO L225 Difference]: With dead ends: 13037 [2021-11-02 22:16:02,563 INFO L226 Difference]: Without dead ends: 6646 [2021-11-02 22:16:02,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:16:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-11-02 22:16:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 6426. [2021-11-02 22:16:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6426 states, 6093 states have (on average 1.3339898243886428) internal successors, (8128), 6137 states have internal predecessors, (8128), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:16:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6426 states to 6426 states and 8788 transitions. [2021-11-02 22:16:02,978 INFO L78 Accepts]: Start accepts. Automaton has 6426 states and 8788 transitions. Word has length 142 [2021-11-02 22:16:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 6426 states and 8788 transitions. [2021-11-02 22:16:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:16:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6426 states and 8788 transitions. [2021-11-02 22:16:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-02 22:16:02,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:02,992 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:03,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:03,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:16:03,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:16:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2092061630, now seen corresponding path program 2 times [2021-11-02 22:16:03,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:03,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298902489] [2021-11-02 22:16:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:03,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:16:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:16:03,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:03,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298902489] [2021-11-02 22:16:03,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298902489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:03,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403684670] [2021-11-02 22:16:03,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:16:03,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:03,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:16:49,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:16:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:16:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:16:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403684670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:50,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:16:50,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-02 22:16:50,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767994782] [2021-11-02 22:16:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:16:50,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:16:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:16:50,101 INFO L87 Difference]: Start difference. First operand 6426 states and 8788 transitions. Second operand has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:17:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:06,656 INFO L93 Difference]: Finished difference Result 13045 states and 18231 transitions. [2021-11-02 22:17:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:17:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-11-02 22:17:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:06,691 INFO L225 Difference]: With dead ends: 13045 [2021-11-02 22:17:06,691 INFO L226 Difference]: Without dead ends: 6650 [2021-11-02 22:17:06,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:17:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2021-11-02 22:17:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6430. [2021-11-02 22:17:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6430 states, 6097 states have (on average 1.3337707069050353) internal successors, (8132), 6141 states have internal predecessors, (8132), 168 states have call successors, (168), 104 states have call predecessors, (168), 164 states have return successors, (492), 188 states have call predecessors, (492), 168 states have call successors, (492) [2021-11-02 22:17:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6430 states to 6430 states and 8792 transitions. [2021-11-02 22:17:07,019 INFO L78 Accepts]: Start accepts. Automaton has 6430 states and 8792 transitions. Word has length 143 [2021-11-02 22:17:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:07,020 INFO L470 AbstractCegarLoop]: Abstraction has 6430 states and 8792 transitions. [2021-11-02 22:17:07,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:17:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6430 states and 8792 transitions. [2021-11-02 22:17:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-02 22:17:07,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:07,035 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:07,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:17:07,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:07,248 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:17:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2014489812, now seen corresponding path program 3 times [2021-11-02 22:17:07,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:07,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216635693] [2021-11-02 22:17:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:07,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:07,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:17:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:17:07,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:07,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216635693] [2021-11-02 22:17:07,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216635693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:07,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738277642] [2021-11-02 22:17:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:17:07,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:07,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:07,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:17:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:17:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:17:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:52,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738277642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:52,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:17:52,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-02 22:17:52,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793524328] [2021-11-02 22:17:52,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:17:52,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:17:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:17:52,923 INFO L87 Difference]: Start difference. First operand 6430 states and 8792 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:17:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:55,967 INFO L93 Difference]: Finished difference Result 19229 states and 26302 transitions. [2021-11-02 22:17:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:17:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-11-02 22:17:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:56,023 INFO L225 Difference]: With dead ends: 19229 [2021-11-02 22:17:56,023 INFO L226 Difference]: Without dead ends: 19224 [2021-11-02 22:17:56,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:17:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-11-02 22:17:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 19214. [2021-11-02 22:17:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 18217 states have (on average 1.3343580172366472) internal successors, (24308), 18353 states have internal predecessors, (24308), 504 states have call successors, (504), 312 states have call predecessors, (504), 492 states have return successors, (1476), 560 states have call predecessors, (1476), 504 states have call successors, (1476) [2021-11-02 22:17:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 26288 transitions. [2021-11-02 22:17:56,915 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 26288 transitions. Word has length 144 [2021-11-02 22:17:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:56,916 INFO L470 AbstractCegarLoop]: Abstraction has 19214 states and 26288 transitions. [2021-11-02 22:17:56,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:17:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 26288 transitions. [2021-11-02 22:17:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-02 22:17:56,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:56,940 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:57,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:57,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:57,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:17:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:57,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1579412906, now seen corresponding path program 1 times [2021-11-02 22:17:57,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:57,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508152969] [2021-11-02 22:17:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:57,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:57,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:17:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:17:57,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:57,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508152969] [2021-11-02 22:17:57,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508152969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:57,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110608619] [2021-11-02 22:17:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:57,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:57,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:57,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:17:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:17:58,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:17:59,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110608619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:59,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:59,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-02 22:17:59,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678127397] [2021-11-02 22:17:59,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:17:59,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:59,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:17:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:17:59,437 INFO L87 Difference]: Start difference. First operand 19214 states and 26288 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:18:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:16,460 INFO L93 Difference]: Finished difference Result 39069 states and 54615 transitions. [2021-11-02 22:18:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:18:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-11-02 22:18:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:16,524 INFO L225 Difference]: With dead ends: 39069 [2021-11-02 22:18:16,524 INFO L226 Difference]: Without dead ends: 19886 [2021-11-02 22:18:16,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:18:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19886 states. [2021-11-02 22:18:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19886 to 19226. [2021-11-02 22:18:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19226 states, 18229 states have (on average 1.3341379121180537) internal successors, (24320), 18365 states have internal predecessors, (24320), 504 states have call successors, (504), 312 states have call predecessors, (504), 492 states have return successors, (1476), 560 states have call predecessors, (1476), 504 states have call successors, (1476) [2021-11-02 22:18:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19226 states to 19226 states and 26300 transitions. [2021-11-02 22:18:17,560 INFO L78 Accepts]: Start accepts. Automaton has 19226 states and 26300 transitions. Word has length 144 [2021-11-02 22:18:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:17,560 INFO L470 AbstractCegarLoop]: Abstraction has 19226 states and 26300 transitions. [2021-11-02 22:18:17,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:18:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19226 states and 26300 transitions. [2021-11-02 22:18:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-02 22:18:17,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:17,582 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:17,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:17,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:17,808 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:18:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1169630212, now seen corresponding path program 2 times [2021-11-02 22:18:17,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:17,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105159380] [2021-11-02 22:18:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:17,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:18:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:18:18,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:18,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105159380] [2021-11-02 22:18:18,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105159380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:18,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415211261] [2021-11-02 22:18:18,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:18:18,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:18:18,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:18:18,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:19:29,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:29,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:19:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:19:30,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415211261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:30,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:19:30,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-02 22:19:30,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750715775] [2021-11-02 22:19:30,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:19:30,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:19:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:30,203 INFO L87 Difference]: Start difference. First operand 19226 states and 26300 transitions. Second operand has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 12 states have internal predecessors, (149), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:19:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:47,424 INFO L93 Difference]: Finished difference Result 39093 states and 54639 transitions. [2021-11-02 22:19:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:19:47,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 12 states have internal predecessors, (149), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-11-02 22:19:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:47,508 INFO L225 Difference]: With dead ends: 39093 [2021-11-02 22:19:47,509 INFO L226 Difference]: Without dead ends: 19898 [2021-11-02 22:19:47,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19898 states. [2021-11-02 22:19:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19898 to 19238. [2021-11-02 22:19:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19238 states, 18241 states have (on average 1.3339180965955815) internal successors, (24332), 18377 states have internal predecessors, (24332), 504 states have call successors, (504), 312 states have call predecessors, (504), 492 states have return successors, (1476), 560 states have call predecessors, (1476), 504 states have call successors, (1476) [2021-11-02 22:19:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19238 states to 19238 states and 26312 transitions. [2021-11-02 22:19:48,737 INFO L78 Accepts]: Start accepts. Automaton has 19238 states and 26312 transitions. Word has length 145 [2021-11-02 22:19:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 19238 states and 26312 transitions. [2021-11-02 22:19:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 12 states have internal predecessors, (149), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:19:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19238 states and 26312 transitions. [2021-11-02 22:19:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 22:19:48,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:48,760 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:48,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:48,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:19:48,985 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:19:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 490620950, now seen corresponding path program 3 times [2021-11-02 22:19:48,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:48,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859074383] [2021-11-02 22:19:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:48,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:49,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:19:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:19:49,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:49,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859074383] [2021-11-02 22:19:49,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859074383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:49,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435682269] [2021-11-02 22:19:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:49,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:49,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:49,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:21:07,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:21:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:21:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 22:21:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435682269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:08,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:08,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-02 22:21:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095838275] [2021-11-02 22:21:08,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:08,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:21:08,248 INFO L87 Difference]: Start difference. First operand 19238 states and 26312 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:10,213 INFO L93 Difference]: Finished difference Result 57724 states and 78958 transitions. [2021-11-02 22:21:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-11-02 22:21:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:10,366 INFO L225 Difference]: With dead ends: 57724 [2021-11-02 22:21:10,366 INFO L226 Difference]: Without dead ends: 38517 [2021-11-02 22:21:10,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:21:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38517 states. [2021-11-02 22:21:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38517 to 19278. [2021-11-02 22:21:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19278 states, 18269 states have (on average 1.333406316711369) internal successors, (24360), 18409 states have internal predecessors, (24360), 504 states have call successors, (504), 312 states have call predecessors, (504), 504 states have return successors, (1500), 568 states have call predecessors, (1500), 504 states have call successors, (1500) [2021-11-02 22:21:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19278 states to 19278 states and 26364 transitions. [2021-11-02 22:21:11,685 INFO L78 Accepts]: Start accepts. Automaton has 19278 states and 26364 transitions. Word has length 146 [2021-11-02 22:21:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:11,686 INFO L470 AbstractCegarLoop]: Abstraction has 19278 states and 26364 transitions. [2021-11-02 22:21:11,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 19278 states and 26364 transitions. [2021-11-02 22:21:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-02 22:21:11,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:11,707 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:11,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-02 22:21:11,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:11,921 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:21:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash 405941213, now seen corresponding path program 1 times [2021-11-02 22:21:11,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:11,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699582076] [2021-11-02 22:21:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:11,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:21:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:21:12,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:12,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699582076] [2021-11-02 22:21:12,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699582076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:12,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128033173] [2021-11-02 22:21:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:12,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:12,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:12,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:21:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:21:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 22:21:14,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128033173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:14,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:14,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-02 22:21:14,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293537] [2021-11-02 22:21:14,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:14,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:14,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:14,302 INFO L87 Difference]: Start difference. First operand 19278 states and 26364 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:17,471 INFO L93 Difference]: Finished difference Result 38525 states and 52691 transitions. [2021-11-02 22:21:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-11-02 22:21:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:17,588 INFO L225 Difference]: With dead ends: 38525 [2021-11-02 22:21:17,588 INFO L226 Difference]: Without dead ends: 19046 [2021-11-02 22:21:17,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19046 states. [2021-11-02 22:21:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19046 to 18988. [2021-11-02 22:21:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18988 states, 17979 states have (on average 1.3313309972745981) internal successors, (23936), 18119 states have internal predecessors, (23936), 504 states have call successors, (504), 312 states have call predecessors, (504), 504 states have return successors, (1500), 568 states have call predecessors, (1500), 504 states have call successors, (1500) [2021-11-02 22:21:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18988 states to 18988 states and 25940 transitions. [2021-11-02 22:21:18,794 INFO L78 Accepts]: Start accepts. Automaton has 18988 states and 25940 transitions. Word has length 153 [2021-11-02 22:21:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:18,795 INFO L470 AbstractCegarLoop]: Abstraction has 18988 states and 25940 transitions. [2021-11-02 22:21:18,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 18988 states and 25940 transitions. [2021-11-02 22:21:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-02 22:21:18,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:18,813 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 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] [2021-11-02 22:21:18,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:21:19,041 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:21:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1352979099, now seen corresponding path program 1 times [2021-11-02 22:21:19,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:19,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873399729] [2021-11-02 22:21:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:19,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:21:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 22:21:19,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:19,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873399729] [2021-11-02 22:21:19,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873399729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:19,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:19,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:21:19,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380199165] [2021-11-02 22:21:19,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:19,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:19,353 INFO L87 Difference]: Start difference. First operand 18988 states and 25940 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:38,314 INFO L93 Difference]: Finished difference Result 28691 states and 39234 transitions. [2021-11-02 22:21:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:38,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-11-02 22:21:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:38,354 INFO L225 Difference]: With dead ends: 28691 [2021-11-02 22:21:38,354 INFO L226 Difference]: Without dead ends: 9733 [2021-11-02 22:21:38,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9733 states. [2021-11-02 22:21:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9733 to 9403. [2021-11-02 22:21:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9403 states, 8898 states have (on average 1.3307484828051248) internal successors, (11841), 8968 states have internal predecessors, (11841), 252 states have call successors, (252), 156 states have call predecessors, (252), 252 states have return successors, (750), 284 states have call predecessors, (750), 252 states have call successors, (750) [2021-11-02 22:21:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9403 states to 9403 states and 12843 transitions. [2021-11-02 22:21:38,971 INFO L78 Accepts]: Start accepts. Automaton has 9403 states and 12843 transitions. Word has length 153 [2021-11-02 22:21:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:38,971 INFO L470 AbstractCegarLoop]: Abstraction has 9403 states and 12843 transitions. [2021-11-02 22:21:38,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 9403 states and 12843 transitions. [2021-11-02 22:21:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-02 22:21:38,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:38,980 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:38,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:21:38,980 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:21:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash -836274688, now seen corresponding path program 1 times [2021-11-02 22:21:38,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:38,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350986215] [2021-11-02 22:21:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:38,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:21:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-02 22:21:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:21:39,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:39,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350986215] [2021-11-02 22:21:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350986215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:39,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32805879] [2021-11-02 22:21:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:39,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:39,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:39,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:21:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:21:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:21:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32805879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:41,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:41,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-02 22:21:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568073747] [2021-11-02 22:21:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:21:41,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:21:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:21:41,588 INFO L87 Difference]: Start difference. First operand 9403 states and 12843 transitions. Second operand has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 14 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:21:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:57,776 INFO L93 Difference]: Finished difference Result 19042 states and 26596 transitions. [2021-11-02 22:21:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:21:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 14 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2021-11-02 22:21:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:57,932 INFO L225 Difference]: With dead ends: 19042 [2021-11-02 22:21:57,933 INFO L226 Difference]: Without dead ends: 9739 [2021-11-02 22:21:57,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:21:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2021-11-02 22:21:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9409. [2021-11-02 22:21:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9409 states, 8904 states have (on average 1.3305256064690028) internal successors, (11847), 8974 states have internal predecessors, (11847), 252 states have call successors, (252), 156 states have call predecessors, (252), 252 states have return successors, (750), 284 states have call predecessors, (750), 252 states have call successors, (750) [2021-11-02 22:21:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9409 states to 9409 states and 12849 transitions. [2021-11-02 22:21:58,598 INFO L78 Accepts]: Start accepts. Automaton has 9409 states and 12849 transitions. Word has length 163 [2021-11-02 22:21:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:58,599 INFO L470 AbstractCegarLoop]: Abstraction has 9409 states and 12849 transitions. [2021-11-02 22:21:58,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 14 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:21:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9409 states and 12849 transitions. [2021-11-02 22:21:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-02 22:21:58,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:58,609 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:58,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 22:21:58,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:21:58,810 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:21:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash -576161390, now seen corresponding path program 2 times [2021-11-02 22:21:58,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:58,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61125772] [2021-11-02 22:21:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:58,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:59,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:21:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-02 22:21:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:21:59,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:59,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61125772] [2021-11-02 22:21:59,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61125772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:59,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146175779] [2021-11-02 22:21:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:21:59,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:59,517 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:59,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:23:42,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:23:42,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:23:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2925 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:23:42,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:23:43,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146175779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:43,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:23:43,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-02 22:23:43,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831386488] [2021-11-02 22:23:43,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:23:43,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:23:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:23:43,697 INFO L87 Difference]: Start difference. First operand 9409 states and 12849 transitions. Second operand has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 16 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:24:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:01,920 INFO L93 Difference]: Finished difference Result 19054 states and 26608 transitions. [2021-11-02 22:24:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:24:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 16 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 164 [2021-11-02 22:24:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:01,981 INFO L225 Difference]: With dead ends: 19054 [2021-11-02 22:24:01,981 INFO L226 Difference]: Without dead ends: 9745 [2021-11-02 22:24:02,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:24:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9745 states. [2021-11-02 22:24:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9745 to 9415. [2021-11-02 22:24:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 8910 states have (on average 1.3303030303030303) internal successors, (11853), 8980 states have internal predecessors, (11853), 252 states have call successors, (252), 156 states have call predecessors, (252), 252 states have return successors, (750), 284 states have call predecessors, (750), 252 states have call successors, (750) [2021-11-02 22:24:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 12855 transitions. [2021-11-02 22:24:02,660 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 12855 transitions. Word has length 164 [2021-11-02 22:24:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:02,661 INFO L470 AbstractCegarLoop]: Abstraction has 9415 states and 12855 transitions. [2021-11-02 22:24:02,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 16 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:24:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 12855 transitions. [2021-11-02 22:24:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 22:24:02,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:02,669 INFO L513 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:02,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:02,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:24:02,873 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:24:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1102583744, now seen corresponding path program 3 times [2021-11-02 22:24:02,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:02,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409986251] [2021-11-02 22:24:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:02,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:03,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-02 22:24:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-02 22:24:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:24:03,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:03,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409986251] [2021-11-02 22:24:03,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409986251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:03,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630895259] [2021-11-02 22:24:03,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:24:03,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:03,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:03,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b6025b-5d4a-457e-b51e-9948f3260301/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process