./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa --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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:56:16,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:56:16,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:56:16,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:56:16,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:56:16,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:56:16,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:56:16,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:56:16,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:56:16,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:56:16,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:56:16,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:56:16,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:56:16,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:56:16,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:56:16,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:56:16,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:56:16,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:56:16,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:56:16,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:56:16,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:56:16,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:56:16,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:56:16,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:56:16,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:56:16,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:56:16,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:56:16,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:56:16,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:56:16,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:56:16,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:56:16,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:56:16,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:56:16,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:56:16,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:56:16,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:56:16,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:56:16,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:56:16,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:56:16,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:56:16,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:56:16,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:56:16,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:56:16,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:56:16,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:56:16,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:56:16,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:56:16,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:56:16,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:56:16,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:56:16,445 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:56:16,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:56:16,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:56:16,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:56:16,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:56:16,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:56:16,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:56:16,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:56:16,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:56:16,448 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_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2021-12-07 00:56:16,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:56:16,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:56:16,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:56:16,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:56:16,640 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:56:16,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-new/count_by_2.i [2021-12-07 00:56:16,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/data/c6bc88d4e/02270f2aeb16453b924c781902b25830/FLAG2c72e8924 [2021-12-07 00:56:17,045 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:56:17,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/sv-benchmarks/c/loop-new/count_by_2.i [2021-12-07 00:56:17,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/data/c6bc88d4e/02270f2aeb16453b924c781902b25830/FLAG2c72e8924 [2021-12-07 00:56:17,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/data/c6bc88d4e/02270f2aeb16453b924c781902b25830 [2021-12-07 00:56:17,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:56:17,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:56:17,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:56:17,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:56:17,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:56:17,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5c710e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17, skipping insertion in model container [2021-12-07 00:56:17,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:56:17,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:56:17,192 WARN L230 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_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-12-07 00:56:17,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:56:17,204 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:56:17,213 WARN L230 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_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-12-07 00:56:17,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:56:17,224 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:56:17,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17 WrapperNode [2021-12-07 00:56:17,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:56:17,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:56:17,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:56:17,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:56:17,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,247 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2021-12-07 00:56:17,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:56:17,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:56:17,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:56:17,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:56:17,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:56:17,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:56:17,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:56:17,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:56:17,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (1/1) ... [2021-12-07 00:56:17,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:56:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:17,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:56:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:56:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:56:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:56:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:56:17,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:56:17,376 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:56:17,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:56:17,430 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:56:17,435 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:56:17,435 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:56:17,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:56:17 BoogieIcfgContainer [2021-12-07 00:56:17,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:56:17,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:56:17,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:56:17,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:56:17,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:56:17" (1/3) ... [2021-12-07 00:56:17,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db5a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:56:17, skipping insertion in model container [2021-12-07 00:56:17,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:56:17" (2/3) ... [2021-12-07 00:56:17,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db5a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:56:17, skipping insertion in model container [2021-12-07 00:56:17,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:56:17" (3/3) ... [2021-12-07 00:56:17,443 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-12-07 00:56:17,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:56:17,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:56:17,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:56:17,493 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 [2021-12-07 00:56:17,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:56:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 00:56:17,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:17,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 00:56:17,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-12-07 00:56:17,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690768944] [2021-12-07 00:56:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:17,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:17,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:17,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690768944] [2021-12-07 00:56:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690768944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:17,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:17,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:56:17,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484271885] [2021-12-07 00:56:17,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:17,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:56:17,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:56:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:17,671 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:17,693 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-12-07 00:56:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:56:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 00:56:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:17,701 INFO L225 Difference]: With dead ends: 22 [2021-12-07 00:56:17,701 INFO L226 Difference]: Without dead ends: 10 [2021-12-07 00:56:17,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:17,706 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:17,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-07 00:56:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-12-07 00:56:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-07 00:56:17,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-12-07 00:56:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:17,730 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-07 00:56:17,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-07 00:56:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 00:56:17,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:17,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:17,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:56:17,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-12-07 00:56:17,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403864097] [2021-12-07 00:56:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:17,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:17,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403864097] [2021-12-07 00:56:17,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403864097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674859912] [2021-12-07 00:56:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:17,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:17,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:56:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:56:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:17,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:17,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674859912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:17,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 00:56:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322153850] [2021-12-07 00:56:17,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:17,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:56:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:56:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:56:17,882 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:17,905 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-12-07 00:56:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:56:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-07 00:56:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:17,907 INFO L225 Difference]: With dead ends: 19 [2021-12-07 00:56:17,907 INFO L226 Difference]: Without dead ends: 15 [2021-12-07 00:56:17,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:56:17,909 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:17,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-07 00:56:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-07 00:56:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-12-07 00:56:17,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-12-07 00:56:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:17,915 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-12-07 00:56:17,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-12-07 00:56:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:56:17,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:17,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:17,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:18,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:18,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2021-12-07 00:56:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:18,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784423027] [2021-12-07 00:56:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:18,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:18,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:18,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784423027] [2021-12-07 00:56:18,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784423027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:18,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599455881] [2021-12-07 00:56:18,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:56:18,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:18,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:18,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:56:18,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:56:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:18,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599455881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:18,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:18,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-07 00:56:18,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729989399] [2021-12-07 00:56:18,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:18,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:56:18,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:56:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:18,426 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:18,455 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-07 00:56:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:56:18,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-07 00:56:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:18,457 INFO L225 Difference]: With dead ends: 31 [2021-12-07 00:56:18,457 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:56:18,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:18,458 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:18,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:56:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-07 00:56:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-12-07 00:56:18,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-12-07 00:56:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:18,463 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-12-07 00:56:18,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-12-07 00:56:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:56:18,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:18,464 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:18,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:56:18,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:18,667 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2021-12-07 00:56:18,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344930590] [2021-12-07 00:56:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:18,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:18,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344930590] [2021-12-07 00:56:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344930590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074409918] [2021-12-07 00:56:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:18,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:18,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:18,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:56:18,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 00:56:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:56:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:18,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074409918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:19,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:19,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-07 00:56:19,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801248908] [2021-12-07 00:56:19,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:19,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:56:19,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:56:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:56:19,079 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:19,123 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-12-07 00:56:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:56:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-07 00:56:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:19,125 INFO L225 Difference]: With dead ends: 55 [2021-12-07 00:56:19,125 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 00:56:19,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:56:19,126 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:19,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 00:56:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 00:56:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-12-07 00:56:19,132 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-12-07 00:56:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:19,132 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-12-07 00:56:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-12-07 00:56:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 00:56:19,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:19,134 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:19,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:56:19,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-07 00:56:19,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2021-12-07 00:56:19,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:19,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050877187] [2021-12-07 00:56:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:19,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050877187] [2021-12-07 00:56:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050877187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125476869] [2021-12-07 00:56:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:56:19,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:19,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:19,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:19,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:56:19,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:56:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:56:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:19,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:20,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125476869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:20,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:20,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-07 00:56:20,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073123899] [2021-12-07 00:56:20,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:20,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 00:56:20,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 00:56:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:56:20,100 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:20,191 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-12-07 00:56:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-07 00:56:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-07 00:56:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:20,193 INFO L225 Difference]: With dead ends: 103 [2021-12-07 00:56:20,193 INFO L226 Difference]: Without dead ends: 99 [2021-12-07 00:56:20,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:56:20,195 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:20,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-07 00:56:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-07 00:56:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-12-07 00:56:20,204 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-12-07 00:56:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:20,204 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-12-07 00:56:20,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-12-07 00:56:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-07 00:56:20,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:20,207 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:20,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:56:20,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:20,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2021-12-07 00:56:20,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864716148] [2021-12-07 00:56:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:20,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:21,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:21,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864716148] [2021-12-07 00:56:21,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864716148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:21,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087785930] [2021-12-07 00:56:21,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:56:21,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:21,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:21,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:56:21,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-07 00:56:21,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:21,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:56:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:22,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087785930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:22,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:22,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-07 00:56:22,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532446913] [2021-12-07 00:56:22,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:22,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-07 00:56:22,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-07 00:56:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-07 00:56:22,773 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:22,959 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2021-12-07 00:56:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-07 00:56:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-07 00:56:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:22,961 INFO L225 Difference]: With dead ends: 199 [2021-12-07 00:56:22,961 INFO L226 Difference]: Without dead ends: 195 [2021-12-07 00:56:22,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-07 00:56:22,964 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:22,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 18 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-07 00:56:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-07 00:56:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-12-07 00:56:22,978 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-12-07 00:56:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:22,978 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-12-07 00:56:22,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-12-07 00:56:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-07 00:56:22,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:22,981 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:23,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:56:23,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:23,182 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2021-12-07 00:56:23,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388708616] [2021-12-07 00:56:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:23,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:25,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:25,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388708616] [2021-12-07 00:56:25,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388708616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:25,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184276062] [2021-12-07 00:56:25,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:56:25,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:25,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:56:25,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-07 00:56:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 00:56:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:30,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184276062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:30,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:30,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-12-07 00:56:30,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180935008] [2021-12-07 00:56:30,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:30,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-12-07 00:56:30,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-12-07 00:56:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-07 00:56:30,886 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:31,405 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2021-12-07 00:56:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-07 00:56:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-07 00:56:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:31,408 INFO L225 Difference]: With dead ends: 391 [2021-12-07 00:56:31,408 INFO L226 Difference]: Without dead ends: 387 [2021-12-07 00:56:31,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-07 00:56:31,411 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 18 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:56:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-07 00:56:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-12-07 00:56:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-12-07 00:56:31,429 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-12-07 00:56:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:31,429 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-12-07 00:56:31,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-12-07 00:56:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-07 00:56:31,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:31,435 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:31,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:56:31,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:56:31,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:31,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2021-12-07 00:56:31,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:31,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219946446] [2021-12-07 00:56:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:31,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:38,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219946446] [2021-12-07 00:56:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219946446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896985113] [2021-12-07 00:56:38,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:56:38,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:38,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:38,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:56:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-07 00:56:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:39,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:01,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896985113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:01,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:01,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2021-12-07 00:57:01,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221578347] [2021-12-07 00:57:01,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:01,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-12-07 00:57:01,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-12-07 00:57:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-12-07 00:57:01,214 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:03,849 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2021-12-07 00:57:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-12-07 00:57:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-12-07 00:57:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:03,854 INFO L225 Difference]: With dead ends: 775 [2021-12-07 00:57:03,854 INFO L226 Difference]: Without dead ends: 771 [2021-12-07 00:57:03,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-12-07 00:57:03,862 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 573 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:03,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 24 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:57:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-07 00:57:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2021-12-07 00:57:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2021-12-07 00:57:03,887 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2021-12-07 00:57:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:03,888 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2021-12-07 00:57:03,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2021-12-07 00:57:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-12-07 00:57:03,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:03,904 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:03,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:57:04,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:04,106 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2021-12-07 00:57:04,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240897475] [2021-12-07 00:57:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:31,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:31,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240897475] [2021-12-07 00:57:31,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240897475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:31,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332445506] [2021-12-07 00:57:31,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:57:31,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:31,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:31,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:57:31,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:57:31,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 384 conjunts are in the unsatisfiable core [2021-12-07 00:57:32,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:32,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:58,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332445506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:58,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:58,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2021-12-07 00:58:58,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223709396] [2021-12-07 00:58:58,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-12-07 00:58:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-12-07 00:58:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2021-12-07 00:58:58,470 INFO L87 Difference]: Start difference. First operand 771 states and 771 transitions. Second operand has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:17,318 INFO L93 Difference]: Finished difference Result 1543 states and 1926 transitions. [2021-12-07 00:59:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-12-07 00:59:17,320 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 770 [2021-12-07 00:59:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:17,326 INFO L225 Difference]: With dead ends: 1543 [2021-12-07 00:59:17,326 INFO L226 Difference]: Without dead ends: 1539 [2021-12-07 00:59:17,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1923 GetRequests, 1156 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 111.6s TimeCoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2021-12-07 00:59:17,357 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:17,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 33 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-07 00:59:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-12-07 00:59:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1539. [2021-12-07 00:59:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.0006501950585176) internal successors, (1539), 1538 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1539 transitions. [2021-12-07 00:59:17,388 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1539 transitions. Word has length 770 [2021-12-07 00:59:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:17,389 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 1539 transitions. [2021-12-07 00:59:17,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1539 transitions. [2021-12-07 00:59:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2021-12-07 00:59:17,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:17,403 INFO L514 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:17,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:59:17,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:17,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1780911831, now seen corresponding path program 9 times [2021-12-07 00:59:17,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111130605] [2021-12-07 00:59:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:17,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:01:13,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111130605] [2021-12-07 01:01:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111130605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268072400] [2021-12-07 01:01:13,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:01:13,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:13,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430c7643-1dd9-4e67-bf6b-d9517e9d8c4f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:01:19,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2021-12-07 01:01:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2329 conjuncts, 768 conjunts are in the unsatisfiable core [2021-12-07 01:01:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:01:21,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:07:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:07:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268072400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:07:29,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:07:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [769, 769, 769] total 1537 [2021-12-07 01:07:29,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657423123] [2021-12-07 01:07:29,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:07:29,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1537 states [2021-12-07 01:07:29,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:07:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1537 interpolants. [2021-12-07 01:07:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180416, Invalid=1180416, Unknown=0, NotChecked=0, Total=2360832 [2021-12-07 01:07:30,175 INFO L87 Difference]: Start difference. First operand 1539 states and 1539 transitions. Second operand has 1537 states, 1537 states have (on average 2.000650618087183) internal successors, (3075), 1537 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)