./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:05:21,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:05:21,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:05:21,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:05:21,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:05:21,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:05:21,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:05:21,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:05:21,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:05:21,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:05:21,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:05:21,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:05:21,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:05:21,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:05:21,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:05:21,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:05:21,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:05:21,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:05:21,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:05:21,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:05:21,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:05:21,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:05:21,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:05:21,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:05:21,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:05:21,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:05:21,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:05:21,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:05:21,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:05:21,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:05:21,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:05:21,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:05:22,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:05:22,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:05:22,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:05:22,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:05:22,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:05:22,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:05:22,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:05:22,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:05:22,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:05:22,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 08:05:22,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:05:22,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:05:22,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:05:22,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:05:22,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:05:22,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:05:22,069 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:05:22,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:05:22,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:05:22,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:05:22,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:05:22,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:05:22,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:05:22,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:05:22,073 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:05:22,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:05:22,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:05:22,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:05:22,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:05:22,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:05:22,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:05:22,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:05:22,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:05:22,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:05:22,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:05:22,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:05:22,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:05:22,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:05:22,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:05:22,078 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_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-07 08:05:22,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:05:22,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:05:22,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:05:22,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:05:22,461 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:05:22,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 08:05:22,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/data/68f37a203/4df45fe43edf4e008d5ca8b5207c2401/FLAG85c98ddfb [2021-11-07 08:05:23,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:05:23,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 08:05:23,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/data/68f37a203/4df45fe43edf4e008d5ca8b5207c2401/FLAG85c98ddfb [2021-11-07 08:05:24,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/data/68f37a203/4df45fe43edf4e008d5ca8b5207c2401 [2021-11-07 08:05:24,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:05:24,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:05:24,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:05:24,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:05:24,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:05:24,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:05:24" (1/1) ... [2021-11-07 08:05:24,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e76d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:24, skipping insertion in model container [2021-11-07 08:05:24,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:05:24" (1/1) ... [2021-11-07 08:05:24,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:05:24,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:05:25,743 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_356b2376-75c5-4bc1-90dd-783eb6ce2d05/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 08:05:25,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:05:25,793 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:05:26,287 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_356b2376-75c5-4bc1-90dd-783eb6ce2d05/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 08:05:26,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:05:26,501 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:05:26,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26 WrapperNode [2021-11-07 08:05:26,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:05:26,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:05:26,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:05:26,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:05:26,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:26,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:26,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:05:26,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:05:26,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:05:27,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:05:27,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:05:27,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:05:27,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:05:27,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:05:27,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (1/1) ... [2021-11-07 08:05:27,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:05:27,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:27,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:05:27,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:05:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 08:05:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 08:05:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 08:05:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 08:05:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:05:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:05:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:05:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:05:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:05:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 08:05:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:05:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:05:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 08:05:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:05:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 08:05:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:05:27,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:05:37,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:05:37,271 INFO L299 CfgBuilder]: Removed 1734 assume(true) statements. [2021-11-07 08:05:37,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:05:37 BoogieIcfgContainer [2021-11-07 08:05:37,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:05:37,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:05:37,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:05:37,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:05:37,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:05:24" (1/3) ... [2021-11-07 08:05:37,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e43b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:05:37, skipping insertion in model container [2021-11-07 08:05:37,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:26" (2/3) ... [2021-11-07 08:05:37,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e43b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:05:37, skipping insertion in model container [2021-11-07 08:05:37,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:05:37" (3/3) ... [2021-11-07 08:05:37,286 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 08:05:37,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:05:37,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:05:37,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:05:37,357 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 [2021-11-07 08:05:37,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:05:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:05:37,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:37,432 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:37,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1253874950, now seen corresponding path program 1 times [2021-11-07 08:05:37,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:37,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006278842] [2021-11-07 08:05:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:37,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006278842] [2021-11-07 08:05:37,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006278842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:37,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:37,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:05:37,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123402930] [2021-11-07 08:05:37,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:05:37,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:05:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:05:38,008 INFO L87 Difference]: Start difference. First operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:38,143 INFO L93 Difference]: Finished difference Result 3664 states and 5469 transitions. [2021-11-07 08:05:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:05:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:05:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:38,171 INFO L225 Difference]: With dead ends: 3664 [2021-11-07 08:05:38,171 INFO L226 Difference]: Without dead ends: 1799 [2021-11-07 08:05:38,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:05:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-07 08:05:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2021-11-07 08:05:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.4799777530589544) internal successors, (2661), 1798 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2661 transitions. [2021-11-07 08:05:38,310 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2661 transitions. Word has length 65 [2021-11-07 08:05:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:38,311 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2661 transitions. [2021-11-07 08:05:38,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2661 transitions. [2021-11-07 08:05:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:05:38,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:38,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:38,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:05:38,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1631549198, now seen corresponding path program 1 times [2021-11-07 08:05:38,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:38,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75109647] [2021-11-07 08:05:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:38,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:38,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:38,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75109647] [2021-11-07 08:05:38,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75109647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:38,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:38,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:38,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708113408] [2021-11-07 08:05:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:05:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:05:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:38,532 INFO L87 Difference]: Start difference. First operand 1799 states and 2661 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:38,757 INFO L93 Difference]: Finished difference Result 4402 states and 6506 transitions. [2021-11-07 08:05:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:05:38,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:05:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:38,783 INFO L225 Difference]: With dead ends: 4402 [2021-11-07 08:05:38,783 INFO L226 Difference]: Without dead ends: 2655 [2021-11-07 08:05:38,788 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 [2021-11-07 08:05:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-07 08:05:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-07 08:05:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4713639788997739) internal successors, (3905), 2654 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3905 transitions. [2021-11-07 08:05:38,891 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3905 transitions. Word has length 65 [2021-11-07 08:05:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:38,895 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3905 transitions. [2021-11-07 08:05:38,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3905 transitions. [2021-11-07 08:05:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:05:38,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:38,902 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:38,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:05:38,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash -91525010, now seen corresponding path program 1 times [2021-11-07 08:05:38,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:38,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106951225] [2021-11-07 08:05:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:38,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:39,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:39,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106951225] [2021-11-07 08:05:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106951225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:39,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:39,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:05:39,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747395177] [2021-11-07 08:05:39,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:05:39,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:05:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:39,255 INFO L87 Difference]: Start difference. First operand 2655 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:39,483 INFO L93 Difference]: Finished difference Result 5258 states and 7749 transitions. [2021-11-07 08:05:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:05:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-07 08:05:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:39,501 INFO L225 Difference]: With dead ends: 5258 [2021-11-07 08:05:39,501 INFO L226 Difference]: Without dead ends: 2655 [2021-11-07 08:05:39,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-07 08:05:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-07 08:05:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4706103993971364) internal successors, (3903), 2654 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3903 transitions. [2021-11-07 08:05:39,614 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3903 transitions. Word has length 93 [2021-11-07 08:05:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:39,616 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3903 transitions. [2021-11-07 08:05:39,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3903 transitions. [2021-11-07 08:05:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:05:39,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:39,622 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:39,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:05:39,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash 568006512, now seen corresponding path program 1 times [2021-11-07 08:05:39,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:39,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774526356] [2021-11-07 08:05:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:39,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:39,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:39,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774526356] [2021-11-07 08:05:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774526356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:39,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:39,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:05:39,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342601884] [2021-11-07 08:05:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:39,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:39,835 INFO L87 Difference]: Start difference. First operand 2655 states and 3903 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:40,070 INFO L93 Difference]: Finished difference Result 5262 states and 7749 transitions. [2021-11-07 08:05:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:05:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-07 08:05:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:40,087 INFO L225 Difference]: With dead ends: 5262 [2021-11-07 08:05:40,087 INFO L226 Difference]: Without dead ends: 2655 [2021-11-07 08:05:40,096 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 [2021-11-07 08:05:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-07 08:05:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-07 08:05:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4698568198944988) internal successors, (3901), 2654 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3901 transitions. [2021-11-07 08:05:40,194 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3901 transitions. Word has length 93 [2021-11-07 08:05:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:40,197 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3901 transitions. [2021-11-07 08:05:40,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3901 transitions. [2021-11-07 08:05:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:05:40,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:40,208 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:40,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:05:40,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1785240599, now seen corresponding path program 1 times [2021-11-07 08:05:40,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:40,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499469019] [2021-11-07 08:05:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:40,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:40,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499469019] [2021-11-07 08:05:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499469019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:40,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:40,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:05:40,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273320071] [2021-11-07 08:05:40,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:40,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:40,454 INFO L87 Difference]: Start difference. First operand 2655 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:40,736 INFO L93 Difference]: Finished difference Result 5260 states and 7743 transitions. [2021-11-07 08:05:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:05:40,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 96 [2021-11-07 08:05:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:40,773 INFO L225 Difference]: With dead ends: 5260 [2021-11-07 08:05:40,773 INFO L226 Difference]: Without dead ends: 5258 [2021-11-07 08:05:40,776 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 [2021-11-07 08:05:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2021-11-07 08:05:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 2657. [2021-11-07 08:05:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 1.4695030120481927) internal successors, (3903), 2656 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3903 transitions. [2021-11-07 08:05:41,040 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3903 transitions. Word has length 96 [2021-11-07 08:05:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:41,041 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 3903 transitions. [2021-11-07 08:05:41,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3903 transitions. [2021-11-07 08:05:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 08:05:41,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:41,047 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:41,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:05:41,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash 876338064, now seen corresponding path program 1 times [2021-11-07 08:05:41,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:41,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935998872] [2021-11-07 08:05:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:41,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:41,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:41,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935998872] [2021-11-07 08:05:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935998872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:41,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:41,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:41,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016205207] [2021-11-07 08:05:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:41,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:41,235 INFO L87 Difference]: Start difference. First operand 2657 states and 3903 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:41,695 INFO L93 Difference]: Finished difference Result 7867 states and 11587 transitions. [2021-11-07 08:05:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:05:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 103 [2021-11-07 08:05:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:41,729 INFO L225 Difference]: With dead ends: 7867 [2021-11-07 08:05:41,729 INFO L226 Difference]: Without dead ends: 5262 [2021-11-07 08:05:41,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2021-11-07 08:05:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 2658. [2021-11-07 08:05:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 1.4693263078660144) internal successors, (3904), 2657 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3904 transitions. [2021-11-07 08:05:41,926 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3904 transitions. Word has length 103 [2021-11-07 08:05:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:41,927 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3904 transitions. [2021-11-07 08:05:41,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3904 transitions. [2021-11-07 08:05:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:05:41,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:41,933 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:05:41,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash -434275537, now seen corresponding path program 1 times [2021-11-07 08:05:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:41,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753302047] [2021-11-07 08:05:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:41,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:42,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:42,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753302047] [2021-11-07 08:05:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753302047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:42,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:42,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:05:42,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087346743] [2021-11-07 08:05:42,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:05:42,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:05:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:05:42,180 INFO L87 Difference]: Start difference. First operand 2658 states and 3904 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:43,327 INFO L93 Difference]: Finished difference Result 10137 states and 14938 transitions. [2021-11-07 08:05:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:05:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 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 105 [2021-11-07 08:05:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:43,407 INFO L225 Difference]: With dead ends: 10137 [2021-11-07 08:05:43,407 INFO L226 Difference]: Without dead ends: 10135 [2021-11-07 08:05:43,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:05:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-11-07 08:05:43,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 2659. [2021-11-07 08:05:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.4691497366440933) internal successors, (3905), 2658 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3905 transitions. [2021-11-07 08:05:43,854 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3905 transitions. Word has length 105 [2021-11-07 08:05:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:43,855 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3905 transitions. [2021-11-07 08:05:43,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3905 transitions. [2021-11-07 08:05:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:05:43,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:43,864 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:43,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:05:43,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1568264917, now seen corresponding path program 1 times [2021-11-07 08:05:43,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:43,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120003842] [2021-11-07 08:05:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:43,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:44,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:44,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120003842] [2021-11-07 08:05:44,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120003842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:44,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:44,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:44,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048117002] [2021-11-07 08:05:44,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:05:44,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:05:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:44,077 INFO L87 Difference]: Start difference. First operand 2659 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:44,652 INFO L93 Difference]: Finished difference Result 6115 states and 8982 transitions. [2021-11-07 08:05:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:05:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-07 08:05:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:44,666 INFO L225 Difference]: With dead ends: 6115 [2021-11-07 08:05:44,666 INFO L226 Difference]: Without dead ends: 3508 [2021-11-07 08:05:44,672 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 [2021-11-07 08:05:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-07 08:05:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2659. [2021-11-07 08:05:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.4687735139202407) internal successors, (3904), 2658 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3904 transitions. [2021-11-07 08:05:45,032 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3904 transitions. Word has length 119 [2021-11-07 08:05:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:45,032 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3904 transitions. [2021-11-07 08:05:45,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3904 transitions. [2021-11-07 08:05:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 08:05:45,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:45,046 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:45,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:05:45,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1677758673, now seen corresponding path program 1 times [2021-11-07 08:05:45,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:45,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85584429] [2021-11-07 08:05:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:45,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:45,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:45,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85584429] [2021-11-07 08:05:45,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85584429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:45,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:45,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:45,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460565434] [2021-11-07 08:05:45,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:45,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:45,311 INFO L87 Difference]: Start difference. First operand 2659 states and 3904 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:46,129 INFO L93 Difference]: Finished difference Result 7872 states and 11589 transitions. [2021-11-07 08:05:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:05:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 121 [2021-11-07 08:05:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:46,147 INFO L225 Difference]: With dead ends: 7872 [2021-11-07 08:05:46,148 INFO L226 Difference]: Without dead ends: 5265 [2021-11-07 08:05:46,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-11-07 08:05:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 2663. [2021-11-07 08:05:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.4684447783621337) internal successors, (3909), 2662 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3909 transitions. [2021-11-07 08:05:46,484 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3909 transitions. Word has length 121 [2021-11-07 08:05:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:46,485 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3909 transitions. [2021-11-07 08:05:46,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3909 transitions. [2021-11-07 08:05:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 08:05:46,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:46,495 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:05:46,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1953947601, now seen corresponding path program 1 times [2021-11-07 08:05:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:46,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983794854] [2021-11-07 08:05:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:05:46,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:46,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983794854] [2021-11-07 08:05:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983794854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:46,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:46,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:46,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265670079] [2021-11-07 08:05:46,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:05:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:05:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:46,668 INFO L87 Difference]: Start difference. First operand 2663 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:47,279 INFO L93 Difference]: Finished difference Result 5301 states and 7784 transitions. [2021-11-07 08:05:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:05:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 124 [2021-11-07 08:05:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:47,289 INFO L225 Difference]: With dead ends: 5301 [2021-11-07 08:05:47,289 INFO L226 Difference]: Without dead ends: 2690 [2021-11-07 08:05:47,296 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 [2021-11-07 08:05:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-11-07 08:05:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2663. [2021-11-07 08:05:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.43801652892562) internal successors, (3828), 2662 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3828 transitions. [2021-11-07 08:05:47,589 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3828 transitions. Word has length 124 [2021-11-07 08:05:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:47,590 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3828 transitions. [2021-11-07 08:05:47,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3828 transitions. [2021-11-07 08:05:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:05:47,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:47,600 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:47,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:05:47,601 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 233252873, now seen corresponding path program 1 times [2021-11-07 08:05:47,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:47,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147804591] [2021-11-07 08:05:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:47,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:47,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:47,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147804591] [2021-11-07 08:05:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147804591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:47,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002904659] [2021-11-07 08:05:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:47,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:47,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:47,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:05:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:05:48,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002904659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:49,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 08:05:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662519675] [2021-11-07 08:05:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:05:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:05:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:05:49,303 INFO L87 Difference]: Start difference. First operand 2663 states and 3828 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:50,630 INFO L93 Difference]: Finished difference Result 10482 states and 15110 transitions. [2021-11-07 08:05:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:05:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 127 [2021-11-07 08:05:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:50,657 INFO L225 Difference]: With dead ends: 10482 [2021-11-07 08:05:50,657 INFO L226 Difference]: Without dead ends: 7871 [2021-11-07 08:05:50,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:05:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-11-07 08:05:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 2666. [2021-11-07 08:05:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 1.4378986866791745) internal successors, (3832), 2665 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3832 transitions. [2021-11-07 08:05:51,166 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3832 transitions. Word has length 127 [2021-11-07 08:05:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:51,167 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 3832 transitions. [2021-11-07 08:05:51,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3832 transitions. [2021-11-07 08:05:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 08:05:51,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:51,178 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:51,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:05:51,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:51,393 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2049324809, now seen corresponding path program 2 times [2021-11-07 08:05:51,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:51,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692948833] [2021-11-07 08:05:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:51,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:51,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:51,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692948833] [2021-11-07 08:05:51,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692948833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:51,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763492023] [2021-11-07 08:05:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:05:51,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:51,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:51,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:05:53,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:05:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:05:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:05:53,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763492023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:53,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:53,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-07 08:05:53,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043928361] [2021-11-07 08:05:53,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:53,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:05:53,824 INFO L87 Difference]: Start difference. First operand 2666 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:54,971 INFO L93 Difference]: Finished difference Result 10158 states and 14649 transitions. [2021-11-07 08:05:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:05:54,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 130 [2021-11-07 08:05:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:54,994 INFO L225 Difference]: With dead ends: 10158 [2021-11-07 08:05:54,994 INFO L226 Difference]: Without dead ends: 7544 [2021-11-07 08:05:55,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:05:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7544 states. [2021-11-07 08:05:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7544 to 2668. [2021-11-07 08:05:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 1.437570303712036) internal successors, (3834), 2667 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3834 transitions. [2021-11-07 08:05:55,405 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3834 transitions. Word has length 130 [2021-11-07 08:05:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:55,406 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 3834 transitions. [2021-11-07 08:05:55,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3834 transitions. [2021-11-07 08:05:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 08:05:55,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:55,415 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:55,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:55,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:05:55,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1620095719, now seen corresponding path program 1 times [2021-11-07 08:05:55,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:55,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024868770] [2021-11-07 08:05:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:55,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:55,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:55,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024868770] [2021-11-07 08:05:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024868770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:55,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:55,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:05:55,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092048944] [2021-11-07 08:05:55,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:05:55,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:05:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:05:55,807 INFO L87 Difference]: Start difference. First operand 2668 states and 3834 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:56,693 INFO L93 Difference]: Finished difference Result 7736 states and 11150 transitions. [2021-11-07 08:05:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:05:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 08:05:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:56,711 INFO L225 Difference]: With dead ends: 7736 [2021-11-07 08:05:56,711 INFO L226 Difference]: Without dead ends: 5120 [2021-11-07 08:05:56,719 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 [2021-11-07 08:05:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5120 states. [2021-11-07 08:05:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5120 to 2671. [2021-11-07 08:05:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.4374531835205993) internal successors, (3838), 2670 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3838 transitions. [2021-11-07 08:05:57,267 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3838 transitions. Word has length 134 [2021-11-07 08:05:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:57,268 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3838 transitions. [2021-11-07 08:05:57,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3838 transitions. [2021-11-07 08:05:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 08:05:57,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:57,277 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:57,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:05:57,278 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash -106626130, now seen corresponding path program 1 times [2021-11-07 08:05:57,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:57,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110218451] [2021-11-07 08:05:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:57,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:57,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:57,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110218451] [2021-11-07 08:05:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110218451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:57,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:57,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:05:57,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245979305] [2021-11-07 08:05:57,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:05:57,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:05:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:05:57,713 INFO L87 Difference]: Start difference. First operand 2671 states and 3838 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:00,754 INFO L93 Difference]: Finished difference Result 14876 states and 21375 transitions. [2021-11-07 08:06:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:06:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-11-07 08:06:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:00,795 INFO L225 Difference]: With dead ends: 14876 [2021-11-07 08:06:00,795 INFO L226 Difference]: Without dead ends: 12243 [2021-11-07 08:06:00,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:06:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2021-11-07 08:06:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 2671. [2021-11-07 08:06:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.4367041198501873) internal successors, (3836), 2670 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3836 transitions. [2021-11-07 08:06:01,386 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3836 transitions. Word has length 138 [2021-11-07 08:06:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:01,386 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3836 transitions. [2021-11-07 08:06:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3836 transitions. [2021-11-07 08:06:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 08:06:01,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:01,396 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:06:01,397 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash -662167478, now seen corresponding path program 1 times [2021-11-07 08:06:01,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:01,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800163653] [2021-11-07 08:06:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:01,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:06:01,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:01,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800163653] [2021-11-07 08:06:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800163653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:06:01,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:06:01,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:06:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315546342] [2021-11-07 08:06:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:06:01,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:06:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:06:01,778 INFO L87 Difference]: Start difference. First operand 2671 states and 3836 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:04,847 INFO L93 Difference]: Finished difference Result 17810 states and 25712 transitions. [2021-11-07 08:06:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:06:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 08:06:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:04,900 INFO L225 Difference]: With dead ends: 17810 [2021-11-07 08:06:04,901 INFO L226 Difference]: Without dead ends: 15191 [2021-11-07 08:06:04,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:06:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2021-11-07 08:06:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 2674. [2021-11-07 08:06:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 1.4362139917695473) internal successors, (3839), 2673 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3839 transitions. [2021-11-07 08:06:05,615 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3839 transitions. Word has length 140 [2021-11-07 08:06:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:05,616 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 3839 transitions. [2021-11-07 08:06:05,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3839 transitions. [2021-11-07 08:06:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:06:05,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:05,626 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:05,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:06:05,627 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1448079762, now seen corresponding path program 1 times [2021-11-07 08:06:05,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:05,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593289113] [2021-11-07 08:06:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:05,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:06:06,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:06,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593289113] [2021-11-07 08:06:06,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593289113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:06:06,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:06:06,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:06:06,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244547439] [2021-11-07 08:06:06,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:06:06,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:06:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:06:06,051 INFO L87 Difference]: Start difference. First operand 2674 states and 3839 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:06,619 INFO L93 Difference]: Finished difference Result 5321 states and 7653 transitions. [2021-11-07 08:06:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:06:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 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 142 [2021-11-07 08:06:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:06,629 INFO L225 Difference]: With dead ends: 5321 [2021-11-07 08:06:06,629 INFO L226 Difference]: Without dead ends: 2679 [2021-11-07 08:06:06,635 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 [2021-11-07 08:06:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-11-07 08:06:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2679. [2021-11-07 08:06:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2678 states have (on average 1.4353995519044063) internal successors, (3844), 2678 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3844 transitions. [2021-11-07 08:06:07,164 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3844 transitions. Word has length 142 [2021-11-07 08:06:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:07,165 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 3844 transitions. [2021-11-07 08:06:07,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3844 transitions. [2021-11-07 08:06:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:06:07,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:07,174 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:07,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:06:07,175 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1644420281, now seen corresponding path program 1 times [2021-11-07 08:06:07,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:07,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711447674] [2021-11-07 08:06:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:07,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:06:07,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:07,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711447674] [2021-11-07 08:06:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711447674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:07,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358820681] [2021-11-07 08:06:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:07,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:07,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:07,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:06:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:08,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:06:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:06:08,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358820681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:06:08,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:08,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-07 08:06:08,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062260666] [2021-11-07 08:06:08,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:06:08,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:06:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:06:08,978 INFO L87 Difference]: Start difference. First operand 2679 states and 3844 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:10,031 INFO L93 Difference]: Finished difference Result 7920 states and 11395 transitions. [2021-11-07 08:06:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:06:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-07 08:06:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:10,050 INFO L225 Difference]: With dead ends: 7920 [2021-11-07 08:06:10,050 INFO L226 Difference]: Without dead ends: 5288 [2021-11-07 08:06:10,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:06:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-11-07 08:06:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 2679. [2021-11-07 08:06:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2678 states have (on average 1.4346527259148618) internal successors, (3842), 2678 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3842 transitions. [2021-11-07 08:06:10,609 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3842 transitions. Word has length 147 [2021-11-07 08:06:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:10,609 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 3842 transitions. [2021-11-07 08:06:10,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3842 transitions. [2021-11-07 08:06:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:06:10,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:10,619 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:10,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:10,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:06:10,845 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash 956736394, now seen corresponding path program 1 times [2021-11-07 08:06:10,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:10,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638673085] [2021-11-07 08:06:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:10,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:06:11,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:11,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638673085] [2021-11-07 08:06:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638673085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:11,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288111713] [2021-11-07 08:06:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:11,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:11,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:11,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:11,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:06:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:06:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:06:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288111713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:14,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:14,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:06:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81316848] [2021-11-07 08:06:14,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:06:14,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:06:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:06:14,115 INFO L87 Difference]: Start difference. First operand 2679 states and 3842 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:14,647 INFO L93 Difference]: Finished difference Result 5330 states and 7658 transitions. [2021-11-07 08:06:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:06:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 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 147 [2021-11-07 08:06:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:14,652 INFO L225 Difference]: With dead ends: 5330 [2021-11-07 08:06:14,652 INFO L226 Difference]: Without dead ends: 2684 [2021-11-07 08:06:14,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:06:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-11-07 08:06:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2684. [2021-11-07 08:06:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 1.4338427133805443) internal successors, (3847), 2683 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3847 transitions. [2021-11-07 08:06:15,053 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3847 transitions. Word has length 147 [2021-11-07 08:06:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:15,054 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3847 transitions. [2021-11-07 08:06:15,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3847 transitions. [2021-11-07 08:06:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 08:06:15,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:15,063 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:15,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:15,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:06:15,281 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1909592145, now seen corresponding path program 2 times [2021-11-07 08:06:15,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:15,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254077380] [2021-11-07 08:06:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:15,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:06:15,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:15,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254077380] [2021-11-07 08:06:15,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254077380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:15,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237938693] [2021-11-07 08:06:15,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:06:15,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:15,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:15,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:06:17,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:06:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:06:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:06:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 08:06:17,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237938693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:06:17,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-07 08:06:17,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919593413] [2021-11-07 08:06:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:06:17,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:06:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:06:17,811 INFO L87 Difference]: Start difference. First operand 2684 states and 3847 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:18,326 INFO L93 Difference]: Finished difference Result 5328 states and 7651 transitions. [2021-11-07 08:06:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:06:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 152 [2021-11-07 08:06:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:18,341 INFO L225 Difference]: With dead ends: 5328 [2021-11-07 08:06:18,341 INFO L226 Difference]: Without dead ends: 2686 [2021-11-07 08:06:18,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:06:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-11-07 08:06:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2686. [2021-11-07 08:06:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 1.4335195530726257) internal successors, (3849), 2685 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 3849 transitions. [2021-11-07 08:06:18,862 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 3849 transitions. Word has length 152 [2021-11-07 08:06:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 3849 transitions. [2021-11-07 08:06:18,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 3849 transitions. [2021-11-07 08:06:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 08:06:18,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:18,872 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:18,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:19,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:19,085 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1815951985, now seen corresponding path program 1 times [2021-11-07 08:06:19,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:19,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724172436] [2021-11-07 08:06:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:19,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:06:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724172436] [2021-11-07 08:06:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724172436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168953486] [2021-11-07 08:06:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:19,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:19,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:19,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:06:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:06:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:06:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168953486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:22,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:22,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:06:22,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818784993] [2021-11-07 08:06:22,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:06:22,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:06:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:06:22,786 INFO L87 Difference]: Start difference. First operand 2686 states and 3849 transitions. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:23,338 INFO L93 Difference]: Finished difference Result 5343 states and 7671 transitions. [2021-11-07 08:06:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:06:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 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 154 [2021-11-07 08:06:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:23,346 INFO L225 Difference]: With dead ends: 5343 [2021-11-07 08:06:23,347 INFO L226 Difference]: Without dead ends: 2691 [2021-11-07 08:06:23,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:06:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-11-07 08:06:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2691. [2021-11-07 08:06:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 1.4327137546468403) internal successors, (3854), 2690 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3854 transitions. [2021-11-07 08:06:23,820 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3854 transitions. Word has length 154 [2021-11-07 08:06:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:23,820 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 3854 transitions. [2021-11-07 08:06:23,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3854 transitions. [2021-11-07 08:06:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 08:06:23,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:23,828 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:23,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:24,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:24,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash -748820474, now seen corresponding path program 2 times [2021-11-07 08:06:24,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:24,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928363743] [2021-11-07 08:06:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:24,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:06:24,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:24,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928363743] [2021-11-07 08:06:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928363743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:24,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686115467] [2021-11-07 08:06:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:06:24,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:24,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:24,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356b2376-75c5-4bc1-90dd-783eb6ce2d05/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:08:41,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:08:41,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:41,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-07 08:08:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:41,669 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:08:41,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 08:08:41,871 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 08:08:41,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-07 08:08:42,914 INFO L354 Elim1Store]: treesize reduction 140, result has 19.1 percent of original size [2021-11-07 08:08:42,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 65 [2021-11-07 08:08:44,212 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-07 08:08:44,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 64 [2021-11-07 08:08:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:08:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-07 08:08:44,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:08:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:08:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:08:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:08:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:44,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:08:45,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-07 08:08:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-07 08:08:45,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-07 08:08:45,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:08:45,798 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 08:08:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 459 [2021-11-07 08:08:46,435 INFO L354 Elim1Store]: treesize reduction 328, result has 14.4 percent of original size [2021-11-07 08:08:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 555 treesize of output 459 [2021-11-07 08:08:46,928 INFO L354 Elim1Store]: treesize reduction 646, result has 10.2 percent of original size [2021-11-07 08:08:46,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 416 treesize of output 414 [2021-11-07 08:08:47,426 INFO L354 Elim1Store]: treesize reduction 1326, result has 8.4 percent of original size [2021-11-07 08:08:47,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 459 treesize of output 409 [2021-11-07 08:08:47,457 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-07 08:08:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 274 [2021-11-07 08:08:47,483 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-07 08:08:47,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 274 treesize of output 230 [2021-11-07 08:08:47,503 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-07 08:08:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 193 treesize of output 157 [2021-11-07 08:08:48,577 INFO L354 Elim1Store]: treesize reduction 410, result has 9.7 percent of original size [2021-11-07 08:08:48,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 302 treesize of output 238 [2021-11-07 08:08:48,801 INFO L354 Elim1Store]: treesize reduction 496, result has 11.7 percent of original size [2021-11-07 08:08:48,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 286 [2021-11-07 08:08:48,978 INFO L354 Elim1Store]: treesize reduction 808, result has 9.3 percent of original size [2021-11-07 08:08:48,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 295 treesize of output 280 [2021-11-07 08:08:51,918 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-07 08:08:51,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 307 treesize of output 237 [2021-11-07 08:08:52,145 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-07 08:08:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 288 treesize of output 267 [2021-11-07 08:08:52,232 INFO L354 Elim1Store]: treesize reduction 406, result has 15.4 percent of original size [2021-11-07 08:08:52,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 269 treesize of output 280 [2021-11-07 08:08:54,729 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-07 08:08:54,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 313 treesize of output 243 [2021-11-07 08:08:54,944 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-07 08:08:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 294 treesize of output 273 [2021-11-07 08:08:55,079 INFO L354 Elim1Store]: treesize reduction 548, result has 13.2 percent of original size [2021-11-07 08:08:55,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 275 treesize of output 289 [2021-11-07 08:09:00,127 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-07 08:09:00,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 334 treesize of output 264 [2021-11-07 08:09:00,379 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-07 08:09:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 294 [2021-11-07 08:09:00,623 INFO L354 Elim1Store]: treesize reduction 898, result has 11.0 percent of original size [2021-11-07 08:09:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 296 treesize of output 326 [2021-11-07 08:09:03,946 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-07 08:09:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 336 treesize of output 266 [2021-11-07 08:09:04,316 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-07 08:09:04,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 317 treesize of output 296 [2021-11-07 08:09:04,587 INFO L354 Elim1Store]: treesize reduction 932, result has 9.8 percent of original size [2021-11-07 08:09:04,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 298 treesize of output 318 [2021-11-07 08:09:07,283 INFO L354 Elim1Store]: treesize reduction 626, result has 12.2 percent of original size [2021-11-07 08:09:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 716 treesize of output 575 [2021-11-07 08:09:07,329 INFO L354 Elim1Store]: treesize reduction 326, result has 0.3 percent of original size [2021-11-07 08:09:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 743 treesize of output 448 [2021-11-07 08:09:07,548 INFO L354 Elim1Store]: treesize reduction 358, result has 13.3 percent of original size [2021-11-07 08:09:07,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 433 treesize of output 322 [2021-11-07 08:09:07,627 INFO L354 Elim1Store]: treesize reduction 175, result has 6.4 percent of original size [2021-11-07 08:09:07,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 260 [2021-11-07 08:09:07,654 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-07 08:09:07,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 297 treesize of output 221 [2021-11-07 08:09:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:09:08,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686115467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:08,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:08,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [6] total 38 [2021-11-07 08:09:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136341876] [2021-11-07 08:09:08,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:09:08,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:09:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1299, Unknown=4, NotChecked=0, Total=1406 [2021-11-07 08:09:08,047 INFO L87 Difference]: Start difference. First operand 2691 states and 3854 transitions. Second operand has 34 states, 34 states have (on average 4.382352941176471) internal successors, (149), 34 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)