./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/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_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/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 32bit --witnessprinter.graph.data.programhash 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:21:53,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:21:53,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:21:53,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:21:53,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:21:53,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:21:53,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:21:53,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:21:53,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:21:53,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:21:53,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:21:53,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:21:53,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:21:53,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:21:53,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:21:53,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:21:53,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:21:53,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:21:53,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:21:53,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:21:53,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:21:53,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:21:53,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:21:53,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:21:53,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:21:53,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:21:53,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:21:53,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:21:53,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:21:53,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:21:53,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:21:53,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:21:53,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:21:53,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:21:53,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:21:53,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:21:53,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:21:53,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:21:53,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:21:53,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:21:53,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:21:53,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:21:53,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:21:53,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:21:53,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:21:53,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:21:53,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:21:53,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:21:53,504 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:21:53,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:21:53,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:21:53,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:21:53,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:21:53,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:21:53,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:21:53,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:21:53,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:21:53,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:21:53,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:21:53,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:21:53,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:21:53,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:21:53,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:21:53,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:21:53,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:53,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:21:53,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:21:53,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:21:53,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:21:53,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:21:53,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:21:53,509 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:21:53,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:21:53,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:21:53,510 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_344e37ae-04b4-4b3f-aed5-df03ed2935c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-02 22:21:53,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:21:53,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:21:53,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:21:53,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:21:53,827 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:21:53,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-02 22:21:53,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/data/6337b1d29/449a1522b20f48b991aac5b643baccfd/FLAG61a2e584b [2021-11-02 22:21:54,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:21:54,616 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-02 22:21:54,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/data/6337b1d29/449a1522b20f48b991aac5b643baccfd/FLAG61a2e584b [2021-11-02 22:21:54,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/data/6337b1d29/449a1522b20f48b991aac5b643baccfd [2021-11-02 22:21:54,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:21:54,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:21:54,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:54,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:21:54,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:21:54,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:54" (1/1) ... [2021-11-02 22:21:54,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7228c456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:54, skipping insertion in model container [2021-11-02 22:21:54,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:54" (1/1) ... [2021-11-02 22:21:54,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:21:54,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:21:55,194 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_344e37ae-04b4-4b3f-aed5-df03ed2935c8/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-02 22:21:55,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:55,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:21:55,541 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_344e37ae-04b4-4b3f-aed5-df03ed2935c8/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-02 22:21:55,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:55,683 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:21:55,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55 WrapperNode [2021-11-02 22:21:55,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:55,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:21:55,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:21:55,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:21:55,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:55,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:55,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:21:55,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:21:55,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:21:55,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:21:55,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:55,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:55,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:55,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:56,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:56,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:56,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:56,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:21:56,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:21:56,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:21:56,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:21:56,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (1/1) ... [2021-11-02 22:21:56,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:56,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:21:56,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_344e37ae-04b4-4b3f-aed5-df03ed2935c8/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:21:56,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:21:56,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:21:56,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:21:56,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:22:01,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:22:01,727 INFO L299 CfgBuilder]: Removed 661 assume(true) statements. [2021-11-02 22:22:01,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:01 BoogieIcfgContainer [2021-11-02 22:22:01,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:22:01,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:22:01,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:22:01,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:22:01,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:21:54" (1/3) ... [2021-11-02 22:22:01,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf060a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:01, skipping insertion in model container [2021-11-02 22:22:01,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:55" (2/3) ... [2021-11-02 22:22:01,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf060a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:01, skipping insertion in model container [2021-11-02 22:22:01,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:01" (3/3) ... [2021-11-02 22:22:01,745 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2021-11-02 22:22:01,754 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:22:01,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-02 22:22:01,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:22:01,830 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 22:22:01,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-02 22:22:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 2604 states, 2598 states have (on average 1.8826020015396459) internal successors, (4891), 2603 states have internal predecessors, (4891), 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 22:22:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:22:01,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:01,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:01,926 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 22:22:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash 257781798, now seen corresponding path program 1 times [2021-11-02 22:22:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:01,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190443454] [2021-11-02 22:22:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:01,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:02,253 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 22:22:02,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:02,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190443454] [2021-11-02 22:22:02,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190443454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:02,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:02,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:02,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215228686] [2021-11-02 22:22:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:02,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:02,310 INFO L87 Difference]: Start difference. First operand has 2604 states, 2598 states have (on average 1.8826020015396459) internal successors, (4891), 2603 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 22:22:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:02,665 INFO L93 Difference]: Finished difference Result 5199 states and 9765 transitions. [2021-11-02 22:22:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2021-11-02 22:22:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:02,723 INFO L225 Difference]: With dead ends: 5199 [2021-11-02 22:22:02,723 INFO L226 Difference]: Without dead ends: 2600 [2021-11-02 22:22:02,733 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 22:22:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-02 22:22:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2021-11-02 22:22:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2595 states have (on average 1.8778420038535646) internal successors, (4873), 2599 states have internal predecessors, (4873), 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 22:22:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4873 transitions. [2021-11-02 22:22:02,938 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4873 transitions. Word has length 44 [2021-11-02 22:22:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:02,942 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4873 transitions. [2021-11-02 22:22:02,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 22:22:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4873 transitions. [2021-11-02 22:22:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:02,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:02,947 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:22:02,948 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 22:22:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash 47999, now seen corresponding path program 1 times [2021-11-02 22:22:02,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:02,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417544553] [2021-11-02 22:22:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:02,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:03,147 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 22:22:03,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417544553] [2021-11-02 22:22:03,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417544553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:03,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:03,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:03,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334751938] [2021-11-02 22:22:03,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:03,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:03,154 INFO L87 Difference]: Start difference. First operand 2600 states and 4873 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 22:22:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:03,385 INFO L93 Difference]: Finished difference Result 5151 states and 9662 transitions. [2021-11-02 22:22:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 51 [2021-11-02 22:22:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:03,407 INFO L225 Difference]: With dead ends: 5151 [2021-11-02 22:22:03,408 INFO L226 Difference]: Without dead ends: 2594 [2021-11-02 22:22:03,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-02 22:22:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2021-11-02 22:22:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.877172653534183) internal successors, (4860), 2593 states have internal predecessors, (4860), 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 22:22:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4860 transitions. [2021-11-02 22:22:03,521 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4860 transitions. Word has length 51 [2021-11-02 22:22:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:03,521 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 4860 transitions. [2021-11-02 22:22:03,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 22:22:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4860 transitions. [2021-11-02 22:22:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:22:03,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:03,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:03,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:22:03,529 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 22:22:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -311834335, now seen corresponding path program 1 times [2021-11-02 22:22:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:03,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101583645] [2021-11-02 22:22:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:03,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:03,679 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 22:22:03,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:03,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101583645] [2021-11-02 22:22:03,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101583645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:03,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254505826] [2021-11-02 22:22:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:03,687 INFO L87 Difference]: Start difference. First operand 2594 states and 4860 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 22:22:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:03,935 INFO L93 Difference]: Finished difference Result 5145 states and 9649 transitions. [2021-11-02 22:22:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2021-11-02 22:22:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:03,953 INFO L225 Difference]: With dead ends: 5145 [2021-11-02 22:22:03,954 INFO L226 Difference]: Without dead ends: 2594 [2021-11-02 22:22:03,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-02 22:22:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2021-11-02 22:22:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.8756276554654308) internal successors, (4856), 2593 states have internal predecessors, (4856), 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 22:22:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4856 transitions. [2021-11-02 22:22:04,063 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4856 transitions. Word has length 52 [2021-11-02 22:22:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 4856 transitions. [2021-11-02 22:22:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 22:22:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4856 transitions. [2021-11-02 22:22:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:22:04,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:04,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:22:04,069 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 22:22:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash 90553468, now seen corresponding path program 1 times [2021-11-02 22:22:04,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:04,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417950721] [2021-11-02 22:22:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:04,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,140 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 22:22:04,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:04,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417950721] [2021-11-02 22:22:04,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417950721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:04,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:04,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:04,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387192414] [2021-11-02 22:22:04,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:04,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:04,144 INFO L87 Difference]: Start difference. First operand 2594 states and 4856 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 22:22:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:04,323 INFO L93 Difference]: Finished difference Result 5145 states and 9645 transitions. [2021-11-02 22:22:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-02 22:22:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:04,340 INFO L225 Difference]: With dead ends: 5145 [2021-11-02 22:22:04,340 INFO L226 Difference]: Without dead ends: 2594 [2021-11-02 22:22:04,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-02 22:22:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2021-11-02 22:22:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.8740826573966782) internal successors, (4852), 2593 states have internal predecessors, (4852), 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 22:22:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4852 transitions. [2021-11-02 22:22:04,510 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4852 transitions. Word has length 53 [2021-11-02 22:22:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 4852 transitions. [2021-11-02 22:22:04,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 22:22:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4852 transitions. [2021-11-02 22:22:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:22:04,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:04,518 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:04,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:22:04,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 841240156, now seen corresponding path program 1 times [2021-11-02 22:22:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:04,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964649950] [2021-11-02 22:22:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:04,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,640 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 22:22:04,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:04,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964649950] [2021-11-02 22:22:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964649950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:04,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:04,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585127156] [2021-11-02 22:22:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:04,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:04,643 INFO L87 Difference]: Start difference. First operand 2594 states and 4852 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 22:22:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:04,845 INFO L93 Difference]: Finished difference Result 5145 states and 9641 transitions. [2021-11-02 22:22:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-02 22:22:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:04,863 INFO L225 Difference]: With dead ends: 5145 [2021-11-02 22:22:04,864 INFO L226 Difference]: Without dead ends: 2594 [2021-11-02 22:22:04,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-02 22:22:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2021-11-02 22:22:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.872537659327926) internal successors, (4848), 2593 states have internal predecessors, (4848), 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 22:22:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4848 transitions. [2021-11-02 22:22:04,995 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4848 transitions. Word has length 54 [2021-11-02 22:22:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:04,996 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 4848 transitions. [2021-11-02 22:22:04,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 22:22:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4848 transitions. [2021-11-02 22:22:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:22:05,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:05,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:05,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:22:05,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:05,002 INFO L85 PathProgramCache]: Analyzing trace with hash -623967780, now seen corresponding path program 1 times [2021-11-02 22:22:05,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:05,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10234484] [2021-11-02 22:22:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:05,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:05,111 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 22:22:05,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:05,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10234484] [2021-11-02 22:22:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10234484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:05,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:05,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298506124] [2021-11-02 22:22:05,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:05,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:05,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:05,119 INFO L87 Difference]: Start difference. First operand 2594 states and 4848 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 22:22:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:05,287 INFO L93 Difference]: Finished difference Result 5145 states and 9637 transitions. [2021-11-02 22:22:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-02 22:22:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:05,309 INFO L225 Difference]: With dead ends: 5145 [2021-11-02 22:22:05,309 INFO L226 Difference]: Without dead ends: 2573 [2021-11-02 22:22:05,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-02 22:22:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-02 22:22:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8746105919003115) internal successors, (4814), 2572 states have internal predecessors, (4814), 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 22:22:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4814 transitions. [2021-11-02 22:22:05,460 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4814 transitions. Word has length 54 [2021-11-02 22:22:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:05,461 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4814 transitions. [2021-11-02 22:22:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 22:22:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4814 transitions. [2021-11-02 22:22:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:22:05,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:05,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:05,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:22:05,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -495709609, now seen corresponding path program 1 times [2021-11-02 22:22:05,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:05,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601762454] [2021-11-02 22:22:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:05,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:05,531 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 22:22:05,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:05,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601762454] [2021-11-02 22:22:05,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601762454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:05,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:05,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:05,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269325171] [2021-11-02 22:22:05,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:05,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:05,535 INFO L87 Difference]: Start difference. First operand 2573 states and 4814 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 22:22:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:05,684 INFO L93 Difference]: Finished difference Result 5124 states and 9603 transitions. [2021-11-02 22:22:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-11-02 22:22:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:05,702 INFO L225 Difference]: With dead ends: 5124 [2021-11-02 22:22:05,702 INFO L226 Difference]: Without dead ends: 2573 [2021-11-02 22:22:05,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-02 22:22:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-02 22:22:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.874221183800623) internal successors, (4813), 2572 states have internal predecessors, (4813), 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 22:22:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4813 transitions. [2021-11-02 22:22:05,824 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4813 transitions. Word has length 55 [2021-11-02 22:22:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:05,824 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4813 transitions. [2021-11-02 22:22:05,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 22:22:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4813 transitions. [2021-11-02 22:22:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:22:05,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:05,828 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:05,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:22:05,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2124879977, now seen corresponding path program 1 times [2021-11-02 22:22:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:05,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362869818] [2021-11-02 22:22:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:05,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:05,900 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 22:22:05,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:05,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362869818] [2021-11-02 22:22:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362869818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:05,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:05,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:05,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289857672] [2021-11-02 22:22:05,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:05,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:05,904 INFO L87 Difference]: Start difference. First operand 2573 states and 4813 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 22:22:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:06,049 INFO L93 Difference]: Finished difference Result 5124 states and 9602 transitions. [2021-11-02 22:22:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-02 22:22:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:06,066 INFO L225 Difference]: With dead ends: 5124 [2021-11-02 22:22:06,067 INFO L226 Difference]: Without dead ends: 2573 [2021-11-02 22:22:06,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-02 22:22:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-02 22:22:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8738317757009346) internal successors, (4812), 2572 states have internal predecessors, (4812), 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 22:22:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4812 transitions. [2021-11-02 22:22:06,192 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4812 transitions. Word has length 56 [2021-11-02 22:22:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:06,193 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4812 transitions. [2021-11-02 22:22:06,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 22:22:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4812 transitions. [2021-11-02 22:22:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:22:06,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:06,196 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:06,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:22:06,197 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 22:22:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash 72012850, now seen corresponding path program 1 times [2021-11-02 22:22:06,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:06,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910455092] [2021-11-02 22:22:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:06,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:06,289 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 22:22:06,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:06,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910455092] [2021-11-02 22:22:06,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910455092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:06,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:06,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:22:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790867333] [2021-11-02 22:22:06,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:22:06,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:22:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:06,296 INFO L87 Difference]: Start difference. First operand 2573 states and 4812 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:06,526 INFO L93 Difference]: Finished difference Result 5118 states and 9590 transitions. [2021-11-02 22:22:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:22:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 22:22:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:06,550 INFO L225 Difference]: With dead ends: 5118 [2021-11-02 22:22:06,550 INFO L226 Difference]: Without dead ends: 2573 [2021-11-02 22:22:06,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:22:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-02 22:22:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-02 22:22:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8734423676012462) internal successors, (4811), 2572 states have internal predecessors, (4811), 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 22:22:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4811 transitions. [2021-11-02 22:22:06,681 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4811 transitions. Word has length 57 [2021-11-02 22:22:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:06,682 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4811 transitions. [2021-11-02 22:22:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4811 transitions. [2021-11-02 22:22:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:22:06,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:06,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:06,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:22:06,685 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 22:22:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 612874754, now seen corresponding path program 1 times [2021-11-02 22:22:06,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:06,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057747522] [2021-11-02 22:22:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:06,757 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 22:22:06,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:06,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057747522] [2021-11-02 22:22:06,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057747522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:06,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:06,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:06,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536764566] [2021-11-02 22:22:06,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:06,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:06,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:06,760 INFO L87 Difference]: Start difference. First operand 2573 states and 4811 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:07,735 INFO L93 Difference]: Finished difference Result 7304 states and 13682 transitions. [2021-11-02 22:22:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 22:22:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:07,756 INFO L225 Difference]: With dead ends: 7304 [2021-11-02 22:22:07,756 INFO L226 Difference]: Without dead ends: 4765 [2021-11-02 22:22:07,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4765 states. [2021-11-02 22:22:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4765 to 2573. [2021-11-02 22:22:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8442367601246106) internal successors, (4736), 2572 states have internal predecessors, (4736), 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 22:22:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4736 transitions. [2021-11-02 22:22:07,918 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4736 transitions. Word has length 58 [2021-11-02 22:22:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4736 transitions. [2021-11-02 22:22:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4736 transitions. [2021-11-02 22:22:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:22:07,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:07,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:07,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:22:07,922 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 22:22:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1261522158, now seen corresponding path program 1 times [2021-11-02 22:22:07,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:07,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154887921] [2021-11-02 22:22:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:07,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:08,013 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 22:22:08,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:08,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154887921] [2021-11-02 22:22:08,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154887921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:08,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:08,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:08,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426526966] [2021-11-02 22:22:08,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:08,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:08,017 INFO L87 Difference]: Start difference. First operand 2573 states and 4736 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 22:22:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:10,597 INFO L93 Difference]: Finished difference Result 21849 states and 40757 transitions. [2021-11-02 22:22:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:22:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 66 [2021-11-02 22:22:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:10,655 INFO L225 Difference]: With dead ends: 21849 [2021-11-02 22:22:10,656 INFO L226 Difference]: Without dead ends: 19328 [2021-11-02 22:22:10,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:22:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19328 states. [2021-11-02 22:22:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19328 to 5069. [2021-11-02 22:22:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5064 states have (on average 1.8489336492890995) internal successors, (9363), 5068 states have internal predecessors, (9363), 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 22:22:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 9363 transitions. [2021-11-02 22:22:11,102 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 9363 transitions. Word has length 66 [2021-11-02 22:22:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:11,102 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 9363 transitions. [2021-11-02 22:22:11,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 22:22:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 9363 transitions. [2021-11-02 22:22:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:22:11,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:11,113 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:11,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:22:11,114 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 22:22:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1622096114, now seen corresponding path program 1 times [2021-11-02 22:22:11,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:11,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649451168] [2021-11-02 22:22:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:11,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:11,200 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 22:22:11,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:11,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649451168] [2021-11-02 22:22:11,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649451168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:11,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:11,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:11,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137241839] [2021-11-02 22:22:11,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:11,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:11,208 INFO L87 Difference]: Start difference. First operand 5069 states and 9363 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:13,150 INFO L93 Difference]: Finished difference Result 20079 states and 37227 transitions. [2021-11-02 22:22:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 22:22:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:13,192 INFO L225 Difference]: With dead ends: 20079 [2021-11-02 22:22:13,192 INFO L226 Difference]: Without dead ends: 15100 [2021-11-02 22:22:13,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:22:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15100 states. [2021-11-02 22:22:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15100 to 5081. [2021-11-02 22:22:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5076 states have (on average 1.8469267139479906) internal successors, (9375), 5080 states have internal predecessors, (9375), 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 22:22:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 9375 transitions. [2021-11-02 22:22:13,520 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 9375 transitions. Word has length 68 [2021-11-02 22:22:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 5081 states and 9375 transitions. [2021-11-02 22:22:13,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 9375 transitions. [2021-11-02 22:22:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:22:13,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:13,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:13,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:22:13,527 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 22:22:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1365563719, now seen corresponding path program 1 times [2021-11-02 22:22:13,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:13,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631584795] [2021-11-02 22:22:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:13,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:13,596 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 22:22:13,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:13,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631584795] [2021-11-02 22:22:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631584795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:13,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:13,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537026562] [2021-11-02 22:22:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:13,599 INFO L87 Difference]: Start difference. First operand 5081 states and 9375 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:15,084 INFO L93 Difference]: Finished difference Result 17749 states and 32936 transitions. [2021-11-02 22:22:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:22:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:15,120 INFO L225 Difference]: With dead ends: 17749 [2021-11-02 22:22:15,120 INFO L226 Difference]: Without dead ends: 12719 [2021-11-02 22:22:15,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12719 states. [2021-11-02 22:22:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12719 to 7032. [2021-11-02 22:22:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7027 states have (on average 1.8292301124235093) internal successors, (12854), 7031 states have internal predecessors, (12854), 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 22:22:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 12854 transitions. [2021-11-02 22:22:15,553 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 12854 transitions. Word has length 69 [2021-11-02 22:22:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:15,554 INFO L470 AbstractCegarLoop]: Abstraction has 7032 states and 12854 transitions. [2021-11-02 22:22:15,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 12854 transitions. [2021-11-02 22:22:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:22:15,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:15,558 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:15,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:22:15,559 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 22:22:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1827187284, now seen corresponding path program 1 times [2021-11-02 22:22:15,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:15,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076172848] [2021-11-02 22:22:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:15,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,647 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 22:22:15,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:15,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076172848] [2021-11-02 22:22:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076172848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:15,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:15,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:15,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555326899] [2021-11-02 22:22:15,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:15,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:15,650 INFO L87 Difference]: Start difference. First operand 7032 states and 12854 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:15,851 INFO L93 Difference]: Finished difference Result 10519 states and 19234 transitions. [2021-11-02 22:22:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:22:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:15,861 INFO L225 Difference]: With dead ends: 10519 [2021-11-02 22:22:15,861 INFO L226 Difference]: Without dead ends: 3512 [2021-11-02 22:22:15,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2021-11-02 22:22:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 3512. [2021-11-02 22:22:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 3507 states have (on average 1.8266324493869404) internal successors, (6406), 3511 states have internal predecessors, (6406), 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 22:22:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 6406 transitions. [2021-11-02 22:22:16,042 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 6406 transitions. Word has length 69 [2021-11-02 22:22:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 3512 states and 6406 transitions. [2021-11-02 22:22:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 6406 transitions. [2021-11-02 22:22:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:22:16,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:16,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:16,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:22:16,045 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 22:22:16,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1985308031, now seen corresponding path program 1 times [2021-11-02 22:22:16,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:16,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566162834] [2021-11-02 22:22:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:16,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:16,115 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 22:22:16,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:16,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566162834] [2021-11-02 22:22:16,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566162834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:16,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:16,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004486565] [2021-11-02 22:22:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:16,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:16,117 INFO L87 Difference]: Start difference. First operand 3512 states and 6406 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 22:22:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:17,221 INFO L93 Difference]: Finished difference Result 25283 states and 46397 transitions. [2021-11-02 22:22:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:22:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2021-11-02 22:22:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:17,259 INFO L225 Difference]: With dead ends: 25283 [2021-11-02 22:22:17,259 INFO L226 Difference]: Without dead ends: 21815 [2021-11-02 22:22:17,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21815 states. [2021-11-02 22:22:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21815 to 6442. [2021-11-02 22:22:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6437 states have (on average 1.8362591269224795) internal successors, (11820), 6441 states have internal predecessors, (11820), 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 22:22:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 11820 transitions. [2021-11-02 22:22:17,818 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 11820 transitions. Word has length 71 [2021-11-02 22:22:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:17,819 INFO L470 AbstractCegarLoop]: Abstraction has 6442 states and 11820 transitions. [2021-11-02 22:22:17,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 22:22:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 11820 transitions. [2021-11-02 22:22:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:22:17,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:17,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:17,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:22:17,822 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 22:22:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1710548417, now seen corresponding path program 1 times [2021-11-02 22:22:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:17,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833240956] [2021-11-02 22:22:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:17,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:17,902 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 22:22:17,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:17,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833240956] [2021-11-02 22:22:17,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833240956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:17,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:17,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892641577] [2021-11-02 22:22:17,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:17,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:17,907 INFO L87 Difference]: Start difference. First operand 6442 states and 11820 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 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 22:22:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:18,756 INFO L93 Difference]: Finished difference Result 11631 states and 21255 transitions. [2021-11-02 22:22:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:22:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2021-11-02 22:22:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:18,771 INFO L225 Difference]: With dead ends: 11631 [2021-11-02 22:22:18,771 INFO L226 Difference]: Without dead ends: 8865 [2021-11-02 22:22:18,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:22:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8865 states. [2021-11-02 22:22:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8865 to 6432. [2021-11-02 22:22:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6432 states, 6427 states have (on average 1.8360043566205073) internal successors, (11800), 6431 states have internal predecessors, (11800), 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 22:22:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 11800 transitions. [2021-11-02 22:22:19,146 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 11800 transitions. Word has length 71 [2021-11-02 22:22:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:19,146 INFO L470 AbstractCegarLoop]: Abstraction has 6432 states and 11800 transitions. [2021-11-02 22:22:19,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 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 22:22:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 11800 transitions. [2021-11-02 22:22:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:22:19,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:19,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:19,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:22:19,150 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 22:22:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1427136123, now seen corresponding path program 1 times [2021-11-02 22:22:19,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:19,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835725125] [2021-11-02 22:22:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:19,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:19,265 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 22:22:19,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:19,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835725125] [2021-11-02 22:22:19,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835725125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:19,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:19,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:19,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294585374] [2021-11-02 22:22:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:19,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:19,269 INFO L87 Difference]: Start difference. First operand 6432 states and 11800 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 22:22:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:20,028 INFO L93 Difference]: Finished difference Result 19760 states and 36280 transitions. [2021-11-02 22:22:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:22:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 73 [2021-11-02 22:22:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:20,051 INFO L225 Difference]: With dead ends: 19760 [2021-11-02 22:22:20,051 INFO L226 Difference]: Without dead ends: 17000 [2021-11-02 22:22:20,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17000 states. [2021-11-02 22:22:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17000 to 8931. [2021-11-02 22:22:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8926 states have (on average 1.8310553439390544) internal successors, (16344), 8930 states have internal predecessors, (16344), 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 22:22:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 16344 transitions. [2021-11-02 22:22:20,526 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 16344 transitions. Word has length 73 [2021-11-02 22:22:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:20,527 INFO L470 AbstractCegarLoop]: Abstraction has 8931 states and 16344 transitions. [2021-11-02 22:22:20,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 22:22:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 16344 transitions. [2021-11-02 22:22:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:22:20,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:20,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:20,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:22:20,531 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 22:22:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2017223191, now seen corresponding path program 1 times [2021-11-02 22:22:20,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:20,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30936839] [2021-11-02 22:22:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:20,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:20,601 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 22:22:20,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:20,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30936839] [2021-11-02 22:22:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30936839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:20,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:20,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306081370] [2021-11-02 22:22:20,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:20,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:20,604 INFO L87 Difference]: Start difference. First operand 8931 states and 16344 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 22:22:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:21,332 INFO L93 Difference]: Finished difference Result 18587 states and 33878 transitions. [2021-11-02 22:22:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:22:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 75 [2021-11-02 22:22:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:21,349 INFO L225 Difference]: With dead ends: 18587 [2021-11-02 22:22:21,350 INFO L226 Difference]: Without dead ends: 13545 [2021-11-02 22:22:21,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:22:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13545 states. [2021-11-02 22:22:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13545 to 8948. [2021-11-02 22:22:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8948 states, 8943 states have (on average 1.829028290282903) internal successors, (16357), 8947 states have internal predecessors, (16357), 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 22:22:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 16357 transitions. [2021-11-02 22:22:21,878 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 16357 transitions. Word has length 75 [2021-11-02 22:22:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 8948 states and 16357 transitions. [2021-11-02 22:22:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 22:22:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 16357 transitions. [2021-11-02 22:22:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 22:22:21,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:21,883 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:21,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:22:21,884 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 22:22:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1310872463, now seen corresponding path program 1 times [2021-11-02 22:22:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:21,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231515373] [2021-11-02 22:22:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:21,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:21,958 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 22:22:21,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231515373] [2021-11-02 22:22:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231515373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:21,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:21,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740991628] [2021-11-02 22:22:21,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:21,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:21,963 INFO L87 Difference]: Start difference. First operand 8948 states and 16357 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 22:22:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:22,843 INFO L93 Difference]: Finished difference Result 20447 states and 37520 transitions. [2021-11-02 22:22:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 82 [2021-11-02 22:22:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:22,859 INFO L225 Difference]: With dead ends: 20447 [2021-11-02 22:22:22,859 INFO L226 Difference]: Without dead ends: 13090 [2021-11-02 22:22:22,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13090 states. [2021-11-02 22:22:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13090 to 8948. [2021-11-02 22:22:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8948 states, 8943 states have (on average 1.820641842782064) internal successors, (16282), 8947 states have internal predecessors, (16282), 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 22:22:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 16282 transitions. [2021-11-02 22:22:23,294 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 16282 transitions. Word has length 82 [2021-11-02 22:22:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 8948 states and 16282 transitions. [2021-11-02 22:22:23,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 22:22:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 16282 transitions. [2021-11-02 22:22:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 22:22:23,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:23,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:22:23,299 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 22:22:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -575052500, now seen corresponding path program 1 times [2021-11-02 22:22:23,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:23,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411349504] [2021-11-02 22:22:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:23,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:23,372 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 22:22:23,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:23,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411349504] [2021-11-02 22:22:23,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411349504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:23,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:23,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:23,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657774210] [2021-11-02 22:22:23,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:23,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:23,375 INFO L87 Difference]: Start difference. First operand 8948 states and 16282 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 22:22:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:23,821 INFO L93 Difference]: Finished difference Result 14356 states and 25958 transitions. [2021-11-02 22:22:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 82 [2021-11-02 22:22:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:23,832 INFO L225 Difference]: With dead ends: 14356 [2021-11-02 22:22:23,832 INFO L226 Difference]: Without dead ends: 8963 [2021-11-02 22:22:23,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8963 states. [2021-11-02 22:22:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8963 to 8948. [2021-11-02 22:22:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8948 states, 8943 states have (on average 1.8092362741809236) internal successors, (16180), 8947 states have internal predecessors, (16180), 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 22:22:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 16180 transitions. [2021-11-02 22:22:24,171 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 16180 transitions. Word has length 82 [2021-11-02 22:22:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:24,171 INFO L470 AbstractCegarLoop]: Abstraction has 8948 states and 16180 transitions. [2021-11-02 22:22:24,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 22:22:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 16180 transitions. [2021-11-02 22:22:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:22:24,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:24,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:24,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:22:24,176 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 22:22:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 325156380, now seen corresponding path program 1 times [2021-11-02 22:22:24,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:24,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960055339] [2021-11-02 22:22:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:24,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:24,237 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 22:22:24,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:24,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960055339] [2021-11-02 22:22:24,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960055339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:24,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:24,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:24,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96461067] [2021-11-02 22:22:24,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:24,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:24,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:24,240 INFO L87 Difference]: Start difference. First operand 8948 states and 16180 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 22:22:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:24,988 INFO L93 Difference]: Finished difference Result 24583 states and 44504 transitions. [2021-11-02 22:22:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-02 22:22:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:25,010 INFO L225 Difference]: With dead ends: 24583 [2021-11-02 22:22:25,010 INFO L226 Difference]: Without dead ends: 17328 [2021-11-02 22:22:25,018 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 22:22:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17328 states. [2021-11-02 22:22:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17328 to 17328. [2021-11-02 22:22:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17328 states, 17323 states have (on average 1.8139467759625931) internal successors, (31423), 17327 states have internal predecessors, (31423), 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 22:22:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17328 states to 17328 states and 31423 transitions. [2021-11-02 22:22:25,783 INFO L78 Accepts]: Start accepts. Automaton has 17328 states and 31423 transitions. Word has length 83 [2021-11-02 22:22:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:25,784 INFO L470 AbstractCegarLoop]: Abstraction has 17328 states and 31423 transitions. [2021-11-02 22:22:25,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 22:22:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 17328 states and 31423 transitions. [2021-11-02 22:22:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:22:25,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:25,789 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:25,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:22:25,789 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash 42479065, now seen corresponding path program 1 times [2021-11-02 22:22:25,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:25,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034061303] [2021-11-02 22:22:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:25,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:25,851 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 22:22:25,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:25,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034061303] [2021-11-02 22:22:25,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034061303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:25,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:25,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:25,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910867449] [2021-11-02 22:22:25,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:25,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:25,853 INFO L87 Difference]: Start difference. First operand 17328 states and 31423 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 22:22:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:27,633 INFO L93 Difference]: Finished difference Result 48280 states and 87480 transitions. [2021-11-02 22:22:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-02 22:22:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:27,682 INFO L225 Difference]: With dead ends: 48280 [2021-11-02 22:22:27,682 INFO L226 Difference]: Without dead ends: 33858 [2021-11-02 22:22:27,693 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 22:22:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33858 states. [2021-11-02 22:22:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33858 to 33856. [2021-11-02 22:22:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33856 states, 33851 states have (on average 1.8156922986027) internal successors, (61463), 33855 states have internal predecessors, (61463), 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 22:22:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33856 states to 33856 states and 61463 transitions. [2021-11-02 22:22:29,295 INFO L78 Accepts]: Start accepts. Automaton has 33856 states and 61463 transitions. Word has length 85 [2021-11-02 22:22:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:29,295 INFO L470 AbstractCegarLoop]: Abstraction has 33856 states and 61463 transitions. [2021-11-02 22:22:29,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 22:22:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33856 states and 61463 transitions. [2021-11-02 22:22:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:22:29,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:29,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:29,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:22:29,301 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 132266832, now seen corresponding path program 1 times [2021-11-02 22:22:29,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:29,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483675870] [2021-11-02 22:22:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:29,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:29,359 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 22:22:29,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:29,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483675870] [2021-11-02 22:22:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483675870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:29,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:29,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132354529] [2021-11-02 22:22:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:29,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:29,362 INFO L87 Difference]: Start difference. First operand 33856 states and 61463 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 22:22:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:32,321 INFO L93 Difference]: Finished difference Result 95179 states and 172483 transitions. [2021-11-02 22:22:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-02 22:22:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:32,425 INFO L225 Difference]: With dead ends: 95179 [2021-11-02 22:22:32,425 INFO L226 Difference]: Without dead ends: 66442 [2021-11-02 22:22:32,451 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 22:22:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66442 states. [2021-11-02 22:22:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66442 to 66438. [2021-11-02 22:22:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66438 states, 66433 states have (on average 1.8158294823355863) internal successors, (120631), 66437 states have internal predecessors, (120631), 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 22:22:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66438 states to 66438 states and 120631 transitions. [2021-11-02 22:22:35,611 INFO L78 Accepts]: Start accepts. Automaton has 66438 states and 120631 transitions. Word has length 86 [2021-11-02 22:22:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:35,612 INFO L470 AbstractCegarLoop]: Abstraction has 66438 states and 120631 transitions. [2021-11-02 22:22:35,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 22:22:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 66438 states and 120631 transitions. [2021-11-02 22:22:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:22:35,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:35,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:35,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:22:35,622 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash -194677120, now seen corresponding path program 1 times [2021-11-02 22:22:35,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:35,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876432664] [2021-11-02 22:22:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:35,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:35,710 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 22:22:35,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:35,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876432664] [2021-11-02 22:22:35,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876432664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:35,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:35,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:35,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845185562] [2021-11-02 22:22:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:35,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:35,713 INFO L87 Difference]: Start difference. First operand 66438 states and 120631 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 22:22:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:41,351 INFO L93 Difference]: Finished difference Result 187970 states and 340556 transitions. [2021-11-02 22:22:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-02 22:22:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:41,575 INFO L225 Difference]: With dead ends: 187970 [2021-11-02 22:22:41,575 INFO L226 Difference]: Without dead ends: 130650 [2021-11-02 22:22:41,632 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 22:22:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130650 states. [2021-11-02 22:22:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130650 to 130644. [2021-11-02 22:22:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130644 states, 130639 states have (on average 1.8151011566224482) internal successors, (237123), 130643 states have internal predecessors, (237123), 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 22:22:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130644 states to 130644 states and 237123 transitions. [2021-11-02 22:22:48,071 INFO L78 Accepts]: Start accepts. Automaton has 130644 states and 237123 transitions. Word has length 87 [2021-11-02 22:22:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:48,071 INFO L470 AbstractCegarLoop]: Abstraction has 130644 states and 237123 transitions. [2021-11-02 22:22:48,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 22:22:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 130644 states and 237123 transitions. [2021-11-02 22:22:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:22:48,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:48,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:48,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:22:48,078 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:22:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1740005031, now seen corresponding path program 1 times [2021-11-02 22:22:48,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:48,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893602872] [2021-11-02 22:22:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:48,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:48,134 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 22:22:48,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:48,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893602872] [2021-11-02 22:22:48,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893602872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:48,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:48,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:48,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445686510] [2021-11-02 22:22:48,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:48,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:48,136 INFO L87 Difference]: Start difference. First operand 130644 states and 237123 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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)