./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:57:15,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:57:15,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:57:15,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:57:15,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:57:16,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:57:16,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:57:16,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:57:16,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:57:16,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:57:16,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:57:16,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:57:16,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:57:16,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:57:16,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:57:16,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:57:16,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:57:16,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:57:16,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:57:16,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:57:16,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:57:16,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:57:16,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:57:16,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:57:16,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:57:16,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:57:16,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:57:16,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:57:16,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:57:16,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:57:16,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:57:16,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:57:16,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:57:16,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:57:16,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:57:16,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:57:16,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:57:16,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:57:16,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:57:16,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:57:16,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:57:16,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:57:16,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:57:16,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:57:16,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:57:16,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:57:16,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:57:16,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:57:16,085 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:57:16,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:57:16,086 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:57:16,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:57:16,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:57:16,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:57:16,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:57:16,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:57:16,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:57:16,088 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:57:16,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:57:16,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:57:16,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:57:16,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:57:16,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:57:16,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:57:16,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:16,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:57:16,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:57:16,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:57:16,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:57:16,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:57:16,094 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:57:16,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:57:16,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:57:16,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:57:16,095 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_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2021-11-09 08:57:16,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:57:16,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:57:16,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:57:16,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:57:16,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:57:16,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-09 08:57:16,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/data/85fa6f2c8/76de57b28aa3473dbd2c8e53edb78072/FLAG6ebdfee66 [2021-11-09 08:57:17,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:57:17,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-09 08:57:17,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/data/85fa6f2c8/76de57b28aa3473dbd2c8e53edb78072/FLAG6ebdfee66 [2021-11-09 08:57:17,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/data/85fa6f2c8/76de57b28aa3473dbd2c8e53edb78072 [2021-11-09 08:57:17,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:57:17,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:57:17,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:17,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:57:17,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:57:17,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6823ab80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17, skipping insertion in model container [2021-11-09 08:57:17,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:57:17,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:57:18,192 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_923af821-9bcf-42a8-a222-d00b97be04e3/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-09 08:57:18,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:18,205 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:57:18,347 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_923af821-9bcf-42a8-a222-d00b97be04e3/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-09 08:57:18,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:18,392 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:57:18,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18 WrapperNode [2021-11-09 08:57:18,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:18,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:18,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:57:18,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:57:18,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:18,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:19,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:19,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:57:19,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:57:19,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:57:19,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:19,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:19,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:19,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:20,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:20,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:20,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:21,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:57:21,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:57:21,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:57:21,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:57:21,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (1/1) ... [2021-11-09 08:57:21,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:21,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:21,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:57:21,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923af821-9bcf-42a8-a222-d00b97be04e3/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:57:21,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:57:21,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:57:21,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:57:21,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:57:44,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:57:44,191 INFO L299 CfgBuilder]: Removed 3937 assume(true) statements. [2021-11-09 08:57:44,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:44 BoogieIcfgContainer [2021-11-09 08:57:44,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:57:44,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:57:44,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:57:44,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:57:44,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:57:17" (1/3) ... [2021-11-09 08:57:44,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf83b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:44, skipping insertion in model container [2021-11-09 08:57:44,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:18" (2/3) ... [2021-11-09 08:57:44,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf83b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:44, skipping insertion in model container [2021-11-09 08:57:44,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:44" (3/3) ... [2021-11-09 08:57:44,231 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2021-11-09 08:57:44,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:57:44,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-09 08:57:44,353 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:57:44,359 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:57:44,360 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-09 08:57:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 17343 states, 17332 states have (on average 1.8895684283406415) internal successors, (32750), 17342 states have internal predecessors, (32750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:57:44,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:44,894 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] [2021-11-09 08:57:44,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2039424680, now seen corresponding path program 1 times [2021-11-09 08:57:44,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:44,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099506038] [2021-11-09 08:57:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:44,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:45,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:45,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099506038] [2021-11-09 08:57:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099506038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:45,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:45,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:57:45,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277021492] [2021-11-09 08:57:45,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:45,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:45,481 INFO L87 Difference]: Start difference. First operand has 17343 states, 17332 states have (on average 1.8895684283406415) internal successors, (32750), 17342 states have internal predecessors, (32750), 0 states have call successors, (0), 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 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:48,584 INFO L93 Difference]: Finished difference Result 69197 states and 130669 transitions. [2021-11-09 08:57:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:57:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:49,042 INFO L225 Difference]: With dead ends: 69197 [2021-11-09 08:57:49,043 INFO L226 Difference]: Without dead ends: 51867 [2021-11-09 08:57:49,104 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 [2021-11-09 08:57:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-11-09 08:57:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 17351. [2021-11-09 08:57:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17351 states, 17341 states have (on average 1.8881840724295023) internal successors, (32743), 17350 states have internal predecessors, (32743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17351 states to 17351 states and 32743 transitions. [2021-11-09 08:57:50,450 INFO L78 Accepts]: Start accepts. Automaton has 17351 states and 32743 transitions. Word has length 30 [2021-11-09 08:57:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 17351 states and 32743 transitions. [2021-11-09 08:57:50,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17351 states and 32743 transitions. [2021-11-09 08:57:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:57:50,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:50,455 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] [2021-11-09 08:57:50,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:57:50,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -419939863, now seen corresponding path program 1 times [2021-11-09 08:57:50,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:50,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944550753] [2021-11-09 08:57:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:50,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:50,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:50,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944550753] [2021-11-09 08:57:50,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944550753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:50,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:50,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:57:50,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763126419] [2021-11-09 08:57:50,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:57:50,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:50,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:57:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:57:50,540 INFO L87 Difference]: Start difference. First operand 17351 states and 32743 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:51,301 INFO L93 Difference]: Finished difference Result 34618 states and 65333 transitions. [2021-11-09 08:57:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:57:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-11-09 08:57:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:51,361 INFO L225 Difference]: With dead ends: 34618 [2021-11-09 08:57:51,361 INFO L226 Difference]: Without dead ends: 17281 [2021-11-09 08:57:51,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:57:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-09 08:57:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17281. [2021-11-09 08:57:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17281 states, 17271 states have (on average 1.887730878350993) internal successors, (32603), 17280 states have internal predecessors, (32603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 32603 transitions. [2021-11-09 08:57:52,019 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 32603 transitions. Word has length 31 [2021-11-09 08:57:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:52,019 INFO L470 AbstractCegarLoop]: Abstraction has 17281 states and 32603 transitions. [2021-11-09 08:57:52,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 32603 transitions. [2021-11-09 08:57:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:57:52,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:52,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:52,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:57:52,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1807218912, now seen corresponding path program 1 times [2021-11-09 08:57:52,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:52,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202117484] [2021-11-09 08:57:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:52,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:52,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:52,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202117484] [2021-11-09 08:57:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202117484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:52,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:57:52,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984296931] [2021-11-09 08:57:52,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:52,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:52,195 INFO L87 Difference]: Start difference. First operand 17281 states and 32603 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:53,164 INFO L93 Difference]: Finished difference Result 34536 states and 65169 transitions. [2021-11-09 08:57:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:57:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:53,235 INFO L225 Difference]: With dead ends: 34536 [2021-11-09 08:57:53,236 INFO L226 Difference]: Without dead ends: 17281 [2021-11-09 08:57:53,270 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 [2021-11-09 08:57:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-09 08:57:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17281. [2021-11-09 08:57:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17281 states, 17271 states have (on average 1.8876150772972033) internal successors, (32601), 17280 states have internal predecessors, (32601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 32601 transitions. [2021-11-09 08:57:54,059 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 32601 transitions. Word has length 34 [2021-11-09 08:57:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:54,060 INFO L470 AbstractCegarLoop]: Abstraction has 17281 states and 32601 transitions. [2021-11-09 08:57:54,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 32601 transitions. [2021-11-09 08:57:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:57:54,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:54,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:54,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:57:54,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash -204771877, now seen corresponding path program 1 times [2021-11-09 08:57:54,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:54,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315816463] [2021-11-09 08:57:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:54,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:54,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:54,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315816463] [2021-11-09 08:57:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315816463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:54,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:54,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:57:54,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008870410] [2021-11-09 08:57:54,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:54,169 INFO L87 Difference]: Start difference. First operand 17281 states and 32601 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:55,165 INFO L93 Difference]: Finished difference Result 34536 states and 65166 transitions. [2021-11-09 08:57:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:55,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 08:57:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:55,227 INFO L225 Difference]: With dead ends: 34536 [2021-11-09 08:57:55,228 INFO L226 Difference]: Without dead ends: 17281 [2021-11-09 08:57:55,257 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 [2021-11-09 08:57:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-09 08:57:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17281. [2021-11-09 08:57:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17281 states, 17271 states have (on average 1.8874992762434137) internal successors, (32599), 17280 states have internal predecessors, (32599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 32599 transitions. [2021-11-09 08:57:55,941 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 32599 transitions. Word has length 35 [2021-11-09 08:57:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:55,941 INFO L470 AbstractCegarLoop]: Abstraction has 17281 states and 32599 transitions. [2021-11-09 08:57:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 32599 transitions. [2021-11-09 08:57:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:57:55,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:55,943 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:55,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:57:55,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1536051483, now seen corresponding path program 1 times [2021-11-09 08:57:55,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:55,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66421446] [2021-11-09 08:57:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:55,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:56,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:56,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66421446] [2021-11-09 08:57:56,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66421446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:56,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:57:56,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160629796] [2021-11-09 08:57:56,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:56,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:56,046 INFO L87 Difference]: Start difference. First operand 17281 states and 32599 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:57,044 INFO L93 Difference]: Finished difference Result 34536 states and 65163 transitions. [2021-11-09 08:57:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:57:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:57,106 INFO L225 Difference]: With dead ends: 34536 [2021-11-09 08:57:57,107 INFO L226 Difference]: Without dead ends: 17281 [2021-11-09 08:57:57,134 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 [2021-11-09 08:57:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-09 08:57:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17281. [2021-11-09 08:57:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17281 states, 17271 states have (on average 1.8873834751896241) internal successors, (32597), 17280 states have internal predecessors, (32597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 32597 transitions. [2021-11-09 08:57:57,889 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 32597 transitions. Word has length 36 [2021-11-09 08:57:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:57,890 INFO L470 AbstractCegarLoop]: Abstraction has 17281 states and 32597 transitions. [2021-11-09 08:57:57,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 32597 transitions. [2021-11-09 08:57:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:57:57,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:57,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:57,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:57:57,892 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1023393674, now seen corresponding path program 1 times [2021-11-09 08:57:57,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:57,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153425189] [2021-11-09 08:57:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:57,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:57,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:57,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153425189] [2021-11-09 08:57:57,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153425189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:57,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:57:57,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33922713] [2021-11-09 08:57:58,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:58,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:58,001 INFO L87 Difference]: Start difference. First operand 17281 states and 32597 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:58,815 INFO L93 Difference]: Finished difference Result 34536 states and 65160 transitions. [2021-11-09 08:57:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:58,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:57:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:58,871 INFO L225 Difference]: With dead ends: 34536 [2021-11-09 08:57:58,871 INFO L226 Difference]: Without dead ends: 17281 [2021-11-09 08:57:58,888 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 [2021-11-09 08:57:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-09 08:57:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17281. [2021-11-09 08:57:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17281 states, 17271 states have (on average 1.8872676741358347) internal successors, (32595), 17280 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 32595 transitions. [2021-11-09 08:57:59,713 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 32595 transitions. Word has length 37 [2021-11-09 08:57:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:59,714 INFO L470 AbstractCegarLoop]: Abstraction has 17281 states and 32595 transitions. [2021-11-09 08:57:59,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 32595 transitions. [2021-11-09 08:57:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:57:59,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:59,715 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] [2021-11-09 08:57:59,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:57:59,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:57:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 547790614, now seen corresponding path program 1 times [2021-11-09 08:57:59,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:59,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933966332] [2021-11-09 08:57:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:59,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:59,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:59,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933966332] [2021-11-09 08:57:59,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933966332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:59,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:59,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:57:59,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313078169] [2021-11-09 08:57:59,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:59,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:59,796 INFO L87 Difference]: Start difference. First operand 17281 states and 32595 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:02,367 INFO L93 Difference]: Finished difference Result 48532 states and 91425 transitions. [2021-11-09 08:58:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:58:02,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-09 08:58:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:02,476 INFO L225 Difference]: With dead ends: 48532 [2021-11-09 08:58:02,476 INFO L226 Difference]: Without dead ends: 31321 [2021-11-09 08:58:02,504 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 [2021-11-09 08:58:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31321 states. [2021-11-09 08:58:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31321 to 30808. [2021-11-09 08:58:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30808 states, 30798 states have (on average 1.886875771153971) internal successors, (58112), 30807 states have internal predecessors, (58112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30808 states to 30808 states and 58112 transitions. [2021-11-09 08:58:03,980 INFO L78 Accepts]: Start accepts. Automaton has 30808 states and 58112 transitions. Word has length 38 [2021-11-09 08:58:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:03,980 INFO L470 AbstractCegarLoop]: Abstraction has 30808 states and 58112 transitions. [2021-11-09 08:58:03,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30808 states and 58112 transitions. [2021-11-09 08:58:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:58:03,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:03,982 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] [2021-11-09 08:58:03,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:58:03,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:58:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -144923343, now seen corresponding path program 1 times [2021-11-09 08:58:03,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:03,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603172037] [2021-11-09 08:58:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:03,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:04,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:04,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603172037] [2021-11-09 08:58:04,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603172037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:04,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:04,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:58:04,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035633737] [2021-11-09 08:58:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:58:04,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:58:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:58:04,084 INFO L87 Difference]: Start difference. First operand 30808 states and 58112 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:14,008 INFO L93 Difference]: Finished difference Result 255097 states and 481245 transitions. [2021-11-09 08:58:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:58:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-09 08:58:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:14,877 INFO L225 Difference]: With dead ends: 255097 [2021-11-09 08:58:14,878 INFO L226 Difference]: Without dead ends: 224359 [2021-11-09 08:58:14,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:58:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224359 states. [2021-11-09 08:58:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224359 to 56895. [2021-11-09 08:58:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56895 states, 56885 states have (on average 1.8828162081392283) internal successors, (107104), 56894 states have internal predecessors, (107104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56895 states to 56895 states and 107104 transitions. [2021-11-09 08:58:18,218 INFO L78 Accepts]: Start accepts. Automaton has 56895 states and 107104 transitions. Word has length 38 [2021-11-09 08:58:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 56895 states and 107104 transitions. [2021-11-09 08:58:18,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 56895 states and 107104 transitions. [2021-11-09 08:58:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:58:18,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:18,221 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] [2021-11-09 08:58:18,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:58:18,222 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:58:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash 531478701, now seen corresponding path program 1 times [2021-11-09 08:58:18,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:18,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15367257] [2021-11-09 08:58:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:18,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:18,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:18,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15367257] [2021-11-09 08:58:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15367257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:18,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:18,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:18,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915742055] [2021-11-09 08:58:18,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:18,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:18,289 INFO L87 Difference]: Start difference. First operand 56895 states and 107104 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:22,004 INFO L93 Difference]: Finished difference Result 169205 states and 318476 transitions. [2021-11-09 08:58:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:22,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-09 08:58:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:22,600 INFO L225 Difference]: With dead ends: 169205 [2021-11-09 08:58:22,600 INFO L226 Difference]: Without dead ends: 112342 [2021-11-09 08:58:22,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112342 states. [2021-11-09 08:58:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112342 to 56771. [2021-11-09 08:58:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56771 states, 56761 states have (on average 1.882560208593929) internal successors, (106856), 56770 states have internal predecessors, (106856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56771 states to 56771 states and 106856 transitions. [2021-11-09 08:58:25,306 INFO L78 Accepts]: Start accepts. Automaton has 56771 states and 106856 transitions. Word has length 39 [2021-11-09 08:58:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:25,307 INFO L470 AbstractCegarLoop]: Abstraction has 56771 states and 106856 transitions. [2021-11-09 08:58:25,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56771 states and 106856 transitions. [2021-11-09 08:58:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:58:25,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:25,308 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] [2021-11-09 08:58:25,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:58:25,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-09 08:58:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1710844854, now seen corresponding path program 1 times [2021-11-09 08:58:25,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:25,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999256638] [2021-11-09 08:58:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:25,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:25,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:25,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999256638] [2021-11-09 08:58:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999256638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:25,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:25,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:58:25,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209984286] [2021-11-09 08:58:25,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:58:25,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:58:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:58:25,384 INFO L87 Difference]: Start difference. First operand 56771 states and 106856 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)