./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/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_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/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 32bit --witnessprinter.graph.data.programhash 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:33:34,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:33:34,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:33:34,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:33:34,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:33:34,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:33:34,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:33:34,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:33:34,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:33:34,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:33:34,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:33:34,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:33:34,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:33:34,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:33:34,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:33:34,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:33:34,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:33:34,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:33:34,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:33:34,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:33:34,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:33:34,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:33:34,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:33:34,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:33:34,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:33:34,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:33:34,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:33:34,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:33:34,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:33:34,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:33:34,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:33:34,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:33:34,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:33:34,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:33:34,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:33:34,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:33:34,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:33:34,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:33:34,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:33:34,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:33:34,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:33:34,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:33:34,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:33:34,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:33:34,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:33:34,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:33:34,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:33:34,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:33:34,166 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:33:34,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:33:34,167 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:33:34,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:33:34,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:33:34,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:33:34,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:33:34,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:33:34,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:33:34,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:33:34,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:33:34,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:33:34,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:33:34,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:33:34,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:33:34,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:33:34,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:33:34,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:33:34,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:33:34,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:33:34,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:33:34,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:33:34,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:33:34,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:33:34,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:33:34,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:33:34,175 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_a7146221-408c-4c35-a72b-ac7d4bd29e67/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d [2021-11-07 07:33:34,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:33:34,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:33:34,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:33:34,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:33:34,456 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:33:34,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/recursive-simple/id_o20.c [2021-11-07 07:33:34,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/data/e74757f0a/22a5fc0aa14c413d9e9f78d372798059/FLAGf40ea606e [2021-11-07 07:33:34,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:33:34,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/sv-benchmarks/c/recursive-simple/id_o20.c [2021-11-07 07:33:34,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/data/e74757f0a/22a5fc0aa14c413d9e9f78d372798059/FLAGf40ea606e [2021-11-07 07:33:35,353 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/data/e74757f0a/22a5fc0aa14c413d9e9f78d372798059 [2021-11-07 07:33:35,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:33:35,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:33:35,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:33:35,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:33:35,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:33:35,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2850a442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35, skipping insertion in model container [2021-11-07 07:33:35,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:33:35,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:33:35,538 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_a7146221-408c-4c35-a72b-ac7d4bd29e67/sv-benchmarks/c/recursive-simple/id_o20.c[516,529] [2021-11-07 07:33:35,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:33:35,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:33:35,565 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_a7146221-408c-4c35-a72b-ac7d4bd29e67/sv-benchmarks/c/recursive-simple/id_o20.c[516,529] [2021-11-07 07:33:35,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:33:35,577 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:33:35,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35 WrapperNode [2021-11-07 07:33:35,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:33:35,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:33:35,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:33:35,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:33:35,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:33:35,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:33:35,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:33:35,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:33:35,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:33:35,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:33:35,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:33:35,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:33:35,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2021-11-07 07:33:35,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:33:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:35,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:33:35,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:33:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:33:35,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:33:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:33:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-11-07 07:33:35,706 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-11-07 07:33:35,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:33:35,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:33:35,866 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:33:35,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:35 BoogieIcfgContainer [2021-11-07 07:33:35,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:33:35,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:33:35,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:33:35,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:33:35,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:33:35" (1/3) ... [2021-11-07 07:33:35,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328ec972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:35, skipping insertion in model container [2021-11-07 07:33:35,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (2/3) ... [2021-11-07 07:33:35,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328ec972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:35, skipping insertion in model container [2021-11-07 07:33:35,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:35" (3/3) ... [2021-11-07 07:33:35,877 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o20.c [2021-11-07 07:33:35,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:33:35,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:33:35,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:33:35,936 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 07:33:35,936 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:33:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:33:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:33:35,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:35,978 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:35,978 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-07 07:33:35,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:36,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149108228] [2021-11-07 07:33:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:36,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,394 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 07:33:36,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:36,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149108228] [2021-11-07 07:33:36,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149108228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:33:36,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:33:36,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:33:36,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573988057] [2021-11-07 07:33:36,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:33:36,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:33:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:33:36,422 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:33:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:36,475 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-07 07:33:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:33:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 07:33:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:36,488 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:33:36,488 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 07:33:36,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:33:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 07:33:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 07:33:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:33:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 07:33:36,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-07 07:33:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:36,536 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 07:33:36,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:33:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 07:33:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:33:36,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:36,539 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:36,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:33:36,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-07 07:33:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:36,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218583215] [2021-11-07 07:33:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:36,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:33:36,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:36,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218583215] [2021-11-07 07:33:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218583215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:36,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465789353] [2021-11-07 07:33:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:36,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:36,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:33:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:33:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:33:37,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465789353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:37,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:37,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 07:33:37,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075143633] [2021-11-07 07:33:37,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:33:37,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:33:37,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:33:37,156 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:33:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:37,196 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-07 07:33:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:33:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-07 07:33:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:37,199 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:33:37,199 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:33:37,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:33:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:33:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 07:33:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:33:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-07 07:33:37,209 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-07 07:33:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:37,212 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-07 07:33:37,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:33:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-07 07:33:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:33:37,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:37,217 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:37,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:37,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:37,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-07 07:33:37,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:37,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635988352] [2021-11-07 07:33:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:37,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:37,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:37,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:33:37,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:37,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635988352] [2021-11-07 07:33:37,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635988352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:37,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808714462] [2021-11-07 07:33:37,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:33:37,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:37,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:37,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:33:37,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:33:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:33:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:33:37,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808714462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:37,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:37,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:33:37,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938087851] [2021-11-07 07:33:37,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:33:37,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:33:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:33:37,943 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:33:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:37,982 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-07 07:33:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:33:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-07 07:33:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:37,985 INFO L225 Difference]: With dead ends: 25 [2021-11-07 07:33:37,985 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 07:33:37,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:33:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 07:33:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-07 07:33:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:33:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-07 07:33:38,024 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-07 07:33:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:38,025 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-07 07:33:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:33:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-07 07:33:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:33:38,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:38,026 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:38,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:38,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:38,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-07 07:33:38,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:38,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175877315] [2021-11-07 07:33:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:38,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:38,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 07:33:38,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:38,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175877315] [2021-11-07 07:33:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175877315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390259452] [2021-11-07 07:33:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:33:38,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:38,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:38,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:33:38,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:33:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:33:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 07:33:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390259452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:38,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:38,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:33:38,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039467921] [2021-11-07 07:33:38,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:33:38,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:38,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:33:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:33:38,812 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:33:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:38,864 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-07 07:33:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:33:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-11-07 07:33:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:38,867 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:33:38,867 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:33:38,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:33:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:33:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 07:33:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 07:33:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-07 07:33:38,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-11-07 07:33:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:38,878 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-07 07:33:38,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:33:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-07 07:33:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:33:38,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:38,880 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:38,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:39,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-07 07:33:39,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-11-07 07:33:39,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:39,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713566452] [2021-11-07 07:33:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:39,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 07:33:39,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:39,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713566452] [2021-11-07 07:33:39,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713566452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:39,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192784159] [2021-11-07 07:33:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:33:39,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:39,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:39,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:39,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:33:39,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:33:39,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:33:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 07:33:39,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192784159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:39,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:39,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 07:33:39,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898430427] [2021-11-07 07:33:39,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:33:39,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:33:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:33:39,677 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-07 07:33:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:39,741 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-07 07:33:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:33:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-11-07 07:33:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:39,744 INFO L225 Difference]: With dead ends: 31 [2021-11-07 07:33:39,744 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 07:33:39,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:33:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 07:33:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 07:33:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-07 07:33:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-07 07:33:39,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-11-07 07:33:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-07 07:33:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-07 07:33:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-07 07:33:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:33:39,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:39,765 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:39,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:39,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-11-07 07:33:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:39,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326997727] [2021-11-07 07:33:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:39,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 07:33:40,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:40,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326997727] [2021-11-07 07:33:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326997727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:40,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259836081] [2021-11-07 07:33:40,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:33:40,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:40,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:40,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:33:40,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:33:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:33:40,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 07:33:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259836081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:40,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:40,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:33:40,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267015369] [2021-11-07 07:33:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:33:40,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:33:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:33:40,656 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-07 07:33:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:40,740 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-07 07:33:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:33:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-11-07 07:33:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:40,742 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:33:40,742 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:33:40,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:33:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:33:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 07:33:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-07 07:33:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-07 07:33:40,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-11-07 07:33:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:40,749 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-07 07:33:40,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-07 07:33:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-07 07:33:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:33:40,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:40,751 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:40,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:40,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:40,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-11-07 07:33:40,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:40,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118759382] [2021-11-07 07:33:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:40,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 07:33:41,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:41,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118759382] [2021-11-07 07:33:41,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118759382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:41,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390500693] [2021-11-07 07:33:41,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:33:41,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:41,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:41,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:33:41,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:33:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:33:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 07:33:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390500693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:41,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:41,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:33:41,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082987160] [2021-11-07 07:33:41,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:33:41,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:41,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:33:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:33:41,737 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-07 07:33:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:41,834 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-07 07:33:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:33:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 46 [2021-11-07 07:33:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:41,837 INFO L225 Difference]: With dead ends: 37 [2021-11-07 07:33:41,838 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 07:33:41,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:33:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 07:33:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 07:33:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-07 07:33:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-07 07:33:41,851 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-11-07 07:33:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:41,851 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-07 07:33:41,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-07 07:33:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-07 07:33:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:33:41,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:41,859 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:41,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:42,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:42,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-11-07 07:33:42,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:42,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121410760] [2021-11-07 07:33:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:42,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 07:33:42,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:42,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121410760] [2021-11-07 07:33:42,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121410760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:42,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348461318] [2021-11-07 07:33:42,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:33:42,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:42,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:42,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:33:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:33:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 07:33:42,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348461318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:42,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:42,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:33:42,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652242646] [2021-11-07 07:33:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:33:42,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:33:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:33:42,951 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-07 07:33:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:43,069 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-07 07:33:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:33:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 52 [2021-11-07 07:33:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:43,073 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:33:43,073 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:33:43,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:33:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:33:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 07:33:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-07 07:33:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-07 07:33:43,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-07 07:33:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:43,086 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-07 07:33:43,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-07 07:33:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-07 07:33:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:33:43,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:43,090 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:43,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:33:43,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-11-07 07:33:43,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:43,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468254356] [2021-11-07 07:33:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:43,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:33:43,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:43,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468254356] [2021-11-07 07:33:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468254356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:43,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087653499] [2021-11-07 07:33:43,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:33:43,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:43,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:43,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:33:43,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:33:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:33:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:33:44,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087653499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:44,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:44,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:33:44,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104856921] [2021-11-07 07:33:44,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:33:44,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:33:44,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:33:44,271 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-07 07:33:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:44,411 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-07 07:33:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:33:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 58 [2021-11-07 07:33:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:44,413 INFO L225 Difference]: With dead ends: 43 [2021-11-07 07:33:44,413 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 07:33:44,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:33:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 07:33:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 07:33:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-07 07:33:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-07 07:33:44,419 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-11-07 07:33:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:44,419 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-07 07:33:44,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-07 07:33:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-07 07:33:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:33:44,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:44,421 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:44,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:44,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:44,647 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-11-07 07:33:44,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:44,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318857094] [2021-11-07 07:33:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:44,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:45,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-07 07:33:45,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318857094] [2021-11-07 07:33:45,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318857094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870849487] [2021-11-07 07:33:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:33:45,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:45,165 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:45,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:33:45,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:33:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:33:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-07 07:33:45,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870849487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:45,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:45,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 07:33:45,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487092058] [2021-11-07 07:33:45,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:33:45,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:33:45,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:33:45,900 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-07 07:33:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:46,072 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-07 07:33:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:33:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 64 [2021-11-07 07:33:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:46,077 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:33:46,077 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 07:33:46,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:33:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 07:33:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-07 07:33:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-07 07:33:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-07 07:33:46,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-11-07 07:33:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:46,084 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-07 07:33:46,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-07 07:33:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-07 07:33:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:33:46,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:46,086 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:46,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:33:46,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-11-07 07:33:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:46,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777765133] [2021-11-07 07:33:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-07 07:33:46,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:46,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777765133] [2021-11-07 07:33:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777765133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:46,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562305246] [2021-11-07 07:33:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:33:46,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:46,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:46,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:33:47,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:33:47,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:33:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-07 07:33:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562305246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:47,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 07:33:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899182413] [2021-11-07 07:33:47,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:33:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:33:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:33:47,629 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-07 07:33:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:47,846 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-07 07:33:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:33:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 70 [2021-11-07 07:33:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:47,847 INFO L225 Difference]: With dead ends: 49 [2021-11-07 07:33:47,847 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 07:33:47,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:33:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 07:33:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-07 07:33:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-07 07:33:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-07 07:33:47,853 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-11-07 07:33:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-07 07:33:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-07 07:33:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-07 07:33:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:33:47,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:47,855 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:47,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:48,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:33:48,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-11-07 07:33:48,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:48,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11898860] [2021-11-07 07:33:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:48,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-07 07:33:48,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:48,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11898860] [2021-11-07 07:33:48,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11898860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:48,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298601542] [2021-11-07 07:33:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:33:48,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:48,780 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:48,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:33:49,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:33:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:33:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-07 07:33:50,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298601542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:50,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:50,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 07:33:50,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45279787] [2021-11-07 07:33:50,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:33:50,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:33:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:33:50,146 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-07 07:33:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:50,393 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-07 07:33:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:33:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2021-11-07 07:33:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:50,395 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:33:50,395 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:33:50,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:33:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:33:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-07 07:33:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-07 07:33:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-07 07:33:50,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-11-07 07:33:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:50,401 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-07 07:33:50,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-07 07:33:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-07 07:33:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:33:50,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:50,404 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:50,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:50,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:33:50,604 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-11-07 07:33:50,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:50,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630534230] [2021-11-07 07:33:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:50,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-07 07:33:51,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:51,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630534230] [2021-11-07 07:33:51,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630534230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:51,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182525880] [2021-11-07 07:33:51,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:33:51,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:51,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:51,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:33:52,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:33:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:33:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-07 07:33:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182525880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:52,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:52,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 07:33:52,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964001037] [2021-11-07 07:33:52,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:33:52,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:33:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:33:52,475 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-07 07:33:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:52,726 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-07 07:33:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:33:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 82 [2021-11-07 07:33:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:52,727 INFO L225 Difference]: With dead ends: 55 [2021-11-07 07:33:52,727 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:33:52,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:33:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:33:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-07 07:33:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-07 07:33:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-07 07:33:52,733 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-11-07 07:33:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:52,734 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-07 07:33:52,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-07 07:33:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-07 07:33:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 07:33:52,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:52,736 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:52,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:52,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:33:52,945 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-11-07 07:33:52,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:52,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534524045] [2021-11-07 07:33:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:52,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-07 07:33:53,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:53,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534524045] [2021-11-07 07:33:53,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534524045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:53,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421235901] [2021-11-07 07:33:53,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:33:53,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:53,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:53,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:53,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:33:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:33:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-07 07:33:54,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421235901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:54,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:54,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 07:33:54,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039667178] [2021-11-07 07:33:54,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:33:54,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:33:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:33:54,657 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-07 07:33:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:54,985 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-07 07:33:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:33:54,986 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 88 [2021-11-07 07:33:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:54,987 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:33:54,987 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:33:54,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:33:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:33:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-07 07:33:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-07 07:33:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-07 07:33:54,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-11-07 07:33:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:54,994 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-07 07:33:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-07 07:33:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-07 07:33:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:33:54,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:54,998 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:55,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:55,211 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-11-07 07:33:55,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:55,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401575893] [2021-11-07 07:33:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:55,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-07 07:33:56,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:56,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401575893] [2021-11-07 07:33:56,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401575893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:56,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896205285] [2021-11-07 07:33:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:33:56,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:56,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:56,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:33:56,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:33:56,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:33:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-07 07:33:57,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896205285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:57,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:57,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 07:33:57,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112676257] [2021-11-07 07:33:57,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:33:57,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:57,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:33:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:33:57,170 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-07 07:33:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:57,515 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-07 07:33:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:33:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 94 [2021-11-07 07:33:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:57,516 INFO L225 Difference]: With dead ends: 61 [2021-11-07 07:33:57,516 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 07:33:57,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:33:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 07:33:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-07 07:33:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-07 07:33:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-07 07:33:57,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-11-07 07:33:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:57,523 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-07 07:33:57,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-07 07:33:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-07 07:33:57,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:33:57,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:57,525 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:57,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:57,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:33:57,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-11-07 07:33:57,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:57,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440412628] [2021-11-07 07:33:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:57,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:57,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:57,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:33:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-07 07:33:58,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:58,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440412628] [2021-11-07 07:33:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440412628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042643392] [2021-11-07 07:33:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:33:58,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:58,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:58,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:33:59,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:33:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:33:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-07 07:34:00,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042643392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:00,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:00,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 07:34:00,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611734238] [2021-11-07 07:34:00,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:34:00,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:34:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:34:00,213 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-07 07:34:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:00,601 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-07 07:34:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:34:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 100 [2021-11-07 07:34:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:00,603 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:34:00,603 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:34:00,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:34:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:34:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-07 07:34:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-07 07:34:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-07 07:34:00,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-11-07 07:34:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:00,610 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-07 07:34:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-07 07:34:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-07 07:34:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:34:00,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:00,612 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:00,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-07 07:34:00,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:34:00,818 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-11-07 07:34:00,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:00,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229521761] [2021-11-07 07:34:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:00,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-07 07:34:02,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229521761] [2021-11-07 07:34:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229521761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23862413] [2021-11-07 07:34:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:34:02,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:02,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:02,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:34:02,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:34:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:34:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-07 07:34:03,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23862413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:03,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:03,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 07:34:03,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141730984] [2021-11-07 07:34:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:34:03,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:34:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:34:03,119 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-07 07:34:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:03,529 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-07 07:34:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:34:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 106 [2021-11-07 07:34:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:03,530 INFO L225 Difference]: With dead ends: 67 [2021-11-07 07:34:03,531 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 07:34:03,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:34:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 07:34:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-07 07:34:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-07 07:34:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-07 07:34:03,537 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-11-07 07:34:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:03,538 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-07 07:34:03,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-07 07:34:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-07 07:34:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:34:03,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:03,539 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:03,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:03,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:34:03,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-11-07 07:34:03,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:03,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887973499] [2021-11-07 07:34:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:03,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:03,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-07 07:34:05,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:05,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887973499] [2021-11-07 07:34:05,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887973499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:05,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650904752] [2021-11-07 07:34:05,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:34:05,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:05,115 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:05,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:34:06,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:34:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:34:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-07 07:34:06,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650904752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:06,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:06,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 07:34:06,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189103508] [2021-11-07 07:34:06,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:34:06,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:34:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:34:06,989 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-07 07:34:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:07,409 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-07 07:34:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:34:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) Word has length 112 [2021-11-07 07:34:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:07,411 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:34:07,412 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:34:07,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:34:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:34:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-07 07:34:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-07 07:34:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-07 07:34:07,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-11-07 07:34:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:07,423 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-07 07:34:07,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-07 07:34:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-07 07:34:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:34:07,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:07,424 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:07,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:07,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:34:07,630 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-11-07 07:34:07,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:07,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431727436] [2021-11-07 07:34:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:07,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:08,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:09,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-07 07:34:09,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:09,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431727436] [2021-11-07 07:34:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431727436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:09,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982550175] [2021-11-07 07:34:09,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:34:09,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:09,076 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:09,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:34:10,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:34:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:34:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-07 07:34:10,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982550175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:10,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:10,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 07:34:10,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612914467] [2021-11-07 07:34:10,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:34:10,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:34:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:34:10,837 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-07 07:34:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:11,348 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-11-07 07:34:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:34:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) Word has length 118 [2021-11-07 07:34:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:11,349 INFO L225 Difference]: With dead ends: 73 [2021-11-07 07:34:11,349 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 07:34:11,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:34:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 07:34:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 07:34:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-07 07:34:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-07 07:34:11,361 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-11-07 07:34:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:11,361 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-07 07:34:11,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-07 07:34:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-07 07:34:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 07:34:11,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:11,364 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:11,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:11,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:11,567 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-11-07 07:34:11,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:11,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812249088] [2021-11-07 07:34:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:11,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:34:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-07 07:34:13,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:13,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812249088] [2021-11-07 07:34:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812249088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:13,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482867380] [2021-11-07 07:34:13,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:34:13,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:13,099 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:34:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:34:13,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-07 07:34:14,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482867380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:14,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:14,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-07 07:34:14,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606095943] [2021-11-07 07:34:14,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:34:14,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:34:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:34:14,402 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-07 07:34:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:14,852 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-07 07:34:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:34:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 124 [2021-11-07 07:34:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:14,853 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:34:14,853 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:34:14,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:34:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:34:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-07 07:34:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-07 07:34:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-07 07:34:14,858 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-11-07 07:34:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:14,859 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-07 07:34:14,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-07 07:34:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-07 07:34:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:34:14,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:14,861 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:14,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:15,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:15,076 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-11-07 07:34:15,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:15,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499008487] [2021-11-07 07:34:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:34:15,190 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:34:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:34:15,297 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:34:15,297 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 07:34:15,298 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:34:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:34:15,303 INFO L731 BasicCegarLoop]: Path program histogram: [20, 1] [2021-11-07 07:34:15,306 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:34:15,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:34:15 BoogieIcfgContainer [2021-11-07 07:34:15,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:34:15,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:34:15,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:34:15,390 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:34:15,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:35" (3/4) ... [2021-11-07 07:34:15,395 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 07:34:15,504 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 07:34:15,504 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:34:15,506 INFO L168 Benchmark]: Toolchain (without parser) took 40147.81 ms. Allocated memory was 98.6 MB in the beginning and 257.9 MB in the end (delta: 159.4 MB). Free memory was 63.8 MB in the beginning and 131.4 MB in the end (delta: -67.6 MB). Peak memory consumption was 181.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,506 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 69.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:34:15,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.76 ms. Allocated memory is still 98.6 MB. Free memory was 63.5 MB in the beginning and 74.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,507 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 73.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,508 INFO L168 Benchmark]: Boogie Preprocessor took 16.88 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 937.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:34:15,508 INFO L168 Benchmark]: RCFGBuilder took 242.05 ms. Allocated memory is still 98.6 MB. Free memory was 72.0 MB in the beginning and 63.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,508 INFO L168 Benchmark]: TraceAbstraction took 39518.73 ms. Allocated memory was 98.6 MB in the beginning and 257.9 MB in the end (delta: 159.4 MB). Free memory was 62.6 MB in the beginning and 51.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 171.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,509 INFO L168 Benchmark]: Witness Printer took 114.85 ms. Allocated memory is still 257.9 MB. Free memory was 51.8 MB in the beginning and 131.4 MB in the end (delta: -79.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:34:15,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 69.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 218.76 ms. Allocated memory is still 98.6 MB. Free memory was 63.5 MB in the beginning and 74.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 73.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.88 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 937.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 242.05 ms. Allocated memory is still 98.6 MB. Free memory was 72.0 MB in the beginning and 63.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39518.73 ms. Allocated memory was 98.6 MB in the beginning and 257.9 MB in the end (delta: 159.4 MB). Free memory was 62.6 MB in the beginning and 51.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 171.7 MB. Max. memory is 16.1 GB. * Witness Printer took 114.85 ms. Allocated memory is still 257.9 MB. Free memory was 51.8 MB in the beginning and 131.4 MB in the end (delta: -79.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 20 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.3s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 623 SDtfs, 3 SDslu, 13431 SDs, 0 SdLazy, 8807 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2211 GetRequests, 1733 SyntacticMatches, 19 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, InterpolantAutomatonStates: 480, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 10475 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3249 ConjunctsInSsa, 912 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-07 07:34:15,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7146221-408c-4c35-a72b-ac7d4bd29e67/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE