./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg --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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:54:10,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:54:10,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:54:10,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:54:10,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:54:10,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:54:10,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:54:10,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:54:10,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:54:10,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:54:10,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:54:10,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:54:10,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:54:10,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:54:10,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:54:10,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:54:10,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:54:10,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:54:10,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:54:10,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:54:10,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:54:10,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:54:10,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:54:10,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:54:10,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:54:10,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:54:10,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:54:10,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:54:10,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:54:10,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:54:10,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:54:10,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:54:10,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:54:10,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:54:10,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:54:10,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:54:10,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:54:10,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:54:10,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:54:10,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:54:10,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:54:10,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:54:11,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:54:11,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:54:11,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:54:11,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:54:11,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:54:11,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:54:11,015 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:54:11,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:54:11,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:54:11,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:54:11,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:54:11,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:54:11,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:54:11,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:54:11,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:54:11,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:54:11,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:54:11,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:54:11,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:54:11,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:54:11,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:54:11,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:54:11,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:54:11,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:54:11,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:54:11,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:54:11,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:54:11,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:54:11,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:54:11,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:54:11,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:54:11,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:54:11,024 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_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2021-10-28 09:54:11,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:54:11,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:54:11,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:54:11,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:54:11,408 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:54:11,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2021-10-28 09:54:11,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/data/271f46a76/e87d7f66ea8f4118a63bdc52d59ed3a2/FLAGa748ced6e [2021-10-28 09:54:12,038 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:54:12,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2021-10-28 09:54:12,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/data/271f46a76/e87d7f66ea8f4118a63bdc52d59ed3a2/FLAGa748ced6e [2021-10-28 09:54:12,394 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/data/271f46a76/e87d7f66ea8f4118a63bdc52d59ed3a2 [2021-10-28 09:54:12,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:54:12,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:54:12,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:54:12,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:54:12,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:54:12,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff5a6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12, skipping insertion in model container [2021-10-28 09:54:12,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:54:12,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:54:12,654 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2021-10-28 09:54:12,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:54:12,695 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:54:12,707 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2021-10-28 09:54:12,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:54:12,726 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:54:12,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12 WrapperNode [2021-10-28 09:54:12,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:54:12,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:54:12,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:54:12,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:54:12,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:54:12,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:54:12,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:54:12,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:54:12,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:54:12,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:54:12,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:54:12,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:54:12,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (1/1) ... [2021-10-28 09:54:12,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:54:12,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:12,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:54:12,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:54:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:54:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:54:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:54:12,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:54:13,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:54:13,163 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-28 09:54:13,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:54:13 BoogieIcfgContainer [2021-10-28 09:54:13,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:54:13,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:54:13,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:54:13,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:54:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:54:12" (1/3) ... [2021-10-28 09:54:13,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c59dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:54:13, skipping insertion in model container [2021-10-28 09:54:13,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:54:12" (2/3) ... [2021-10-28 09:54:13,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c59dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:54:13, skipping insertion in model container [2021-10-28 09:54:13,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:54:13" (3/3) ... [2021-10-28 09:54:13,189 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2021-10-28 09:54:13,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:54:13,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 09:54:13,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:54:13,288 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 [2021-10-28 09:54:13,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 09:54:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:54:13,311 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:13,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:13,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-10-28 09:54:13,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:13,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485047674] [2021-10-28 09:54:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:13,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:13,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:13,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485047674] [2021-10-28 09:54:13,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485047674] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:54:13,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:54:13,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:54:13,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402019699] [2021-10-28 09:54:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:54:13,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:54:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:54:13,566 INFO L87 Difference]: Start difference. First operand has 23 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:13,582 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-10-28 09:54:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:54:13,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-28 09:54:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:13,592 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:54:13,593 INFO L226 Difference]: Without dead ends: 19 [2021-10-28 09:54:13,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:54:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-28 09:54:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-28 09:54:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-28 09:54:13,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-10-28 09:54:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:13,633 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-28 09:54:13,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-10-28 09:54:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:54:13,636 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:13,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:13,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:54:13,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-10-28 09:54:13,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:13,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419326010] [2021-10-28 09:54:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:13,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:13,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:13,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011793000] [2021-10-28 09:54:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:13,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:13,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:13,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:54:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:54:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:13,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:13,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419326010] [2021-10-28 09:54:13,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:13,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011793000] [2021-10-28 09:54:13,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011793000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:54:13,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:54:13,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:54:13,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804404513] [2021-10-28 09:54:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:54:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:54:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:54:13,966 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:14,034 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-28 09:54:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:54:14,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-28 09:54:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:14,037 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:54:14,037 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:54:14,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:54:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:54:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-10-28 09:54:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 09:54:14,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2021-10-28 09:54:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:14,046 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 09:54:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 09:54:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:54:14,048 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:14,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:14,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:14,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:14,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -937526112, now seen corresponding path program 1 times [2021-10-28 09:54:14,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:14,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895946647] [2021-10-28 09:54:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:14,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:14,280 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:14,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667896269] [2021-10-28 09:54:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:14,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:14,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:14,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:54:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:54:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:14,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:14,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895946647] [2021-10-28 09:54:14,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:14,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667896269] [2021-10-28 09:54:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667896269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:54:14,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:54:14,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:54:14,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921942255] [2021-10-28 09:54:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:54:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:54:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:54:14,558 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-28 09:54:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:14,649 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-28 09:54:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:54:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) Word has length 14 [2021-10-28 09:54:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:14,651 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:54:14,651 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:54:14,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:54:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:54:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-28 09:54:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-28 09:54:14,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2021-10-28 09:54:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:14,663 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-28 09:54:14,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-28 09:54:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-28 09:54:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:54:14,665 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:14,666 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:14,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:14,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:14,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1030171456, now seen corresponding path program 1 times [2021-10-28 09:54:14,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:14,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260889813] [2021-10-28 09:54:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:14,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:14,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:14,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352613981] [2021-10-28 09:54:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:14,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:14,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:14,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:54:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:14,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:54:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:16,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:16,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260889813] [2021-10-28 09:54:16,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:16,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352613981] [2021-10-28 09:54:16,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352613981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:16,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:16,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 09:54:16,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197830218] [2021-10-28 09:54:16,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:54:16,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:54:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:54:16,344 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:16,902 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-28 09:54:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:54:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-28 09:54:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:16,904 INFO L225 Difference]: With dead ends: 38 [2021-10-28 09:54:16,904 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:54:16,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:54:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:54:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2021-10-28 09:54:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 09:54:16,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2021-10-28 09:54:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:54:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-28 09:54:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:54:16,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:16,912 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:16,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-28 09:54:17,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:17,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1032018498, now seen corresponding path program 1 times [2021-10-28 09:54:17,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:17,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848669867] [2021-10-28 09:54:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:17,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:17,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:17,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12247728] [2021-10-28 09:54:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:17,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:17,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:17,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:17,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:54:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:54:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:18,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:18,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848669867] [2021-10-28 09:54:18,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:18,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12247728] [2021-10-28 09:54:18,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12247728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:18,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:18,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:54:18,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323657641] [2021-10-28 09:54:18,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:54:18,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:54:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:54:18,572 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:18,875 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-28 09:54:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:54:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-28 09:54:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:18,876 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:54:18,877 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 09:54:18,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:54:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 09:54:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-28 09:54:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 09:54:18,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-10-28 09:54:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:18,883 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 09:54:18,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-28 09:54:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:54:18,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:18,884 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:18,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:19,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:19,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1993537895, now seen corresponding path program 1 times [2021-10-28 09:54:19,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:19,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976797222] [2021-10-28 09:54:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:19,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:19,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:19,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540725265] [2021-10-28 09:54:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:19,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:19,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:19,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:54:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:54:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:54:19,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:19,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976797222] [2021-10-28 09:54:19,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:19,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540725265] [2021-10-28 09:54:19,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540725265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:54:19,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:54:19,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:54:19,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447135463] [2021-10-28 09:54:19,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:54:19,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:54:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:54:19,435 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:21,896 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-28 09:54:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:54:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-28 09:54:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:21,897 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:54:21,898 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:54:21,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:54:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:54:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-10-28 09:54:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 09:54:21,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-10-28 09:54:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:21,903 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:54:21,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-28 09:54:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:54:21,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:21,904 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:21,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:22,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:54:22,105 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash -184870151, now seen corresponding path program 2 times [2021-10-28 09:54:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:22,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551560908] [2021-10-28 09:54:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:22,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:22,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:22,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166034401] [2021-10-28 09:54:22,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:54:22,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:22,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:22,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:54:22,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:54:22,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:54:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:54:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:35,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:35,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551560908] [2021-10-28 09:54:35,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:35,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166034401] [2021-10-28 09:54:35,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166034401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:35,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:35,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 09:54:35,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956893768] [2021-10-28 09:54:35,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:54:35,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:54:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:54:35,785 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:39,424 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-10-28 09:54:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:54:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-28 09:54:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:39,425 INFO L225 Difference]: With dead ends: 38 [2021-10-28 09:54:39,426 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:54:39,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:54:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:54:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-10-28 09:54:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-28 09:54:39,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-10-28 09:54:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:39,432 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-28 09:54:39,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-28 09:54:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:54:39,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:39,434 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:39,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:39,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:54:39,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -183023109, now seen corresponding path program 1 times [2021-10-28 09:54:39,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:39,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585963482] [2021-10-28 09:54:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:39,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:39,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:39,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542675101] [2021-10-28 09:54:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:39,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:39,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:39,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:54:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:54:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:54:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:49,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:49,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585963482] [2021-10-28 09:54:49,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:49,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542675101] [2021-10-28 09:54:49,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542675101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:49,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:49,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:54:49,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953957643] [2021-10-28 09:54:49,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:54:49,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:54:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:54:49,556 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:50,271 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-28 09:54:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:54:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-28 09:54:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:50,272 INFO L225 Difference]: With dead ends: 39 [2021-10-28 09:54:50,273 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:54:50,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:54:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:54:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2021-10-28 09:54:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-28 09:54:50,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-10-28 09:54:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:50,279 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-28 09:54:50,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-28 09:54:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:54:50,280 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:50,280 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:50,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 09:54:50,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:54:50,487 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:50,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash -577897161, now seen corresponding path program 2 times [2021-10-28 09:54:50,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:50,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23922195] [2021-10-28 09:54:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:50,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:50,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:50,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588380708] [2021-10-28 09:54:50,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:54:50,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:50,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:50,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:50,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:54:50,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:54:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:54:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:54:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:51,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:51,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23922195] [2021-10-28 09:54:51,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:51,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588380708] [2021-10-28 09:54:51,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588380708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:51,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:54:51,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224315315] [2021-10-28 09:54:51,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:54:51,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:54:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:54:51,493 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:51,835 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-10-28 09:54:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:54:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-28 09:54:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:51,837 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:54:51,837 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:54:51,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:54:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:54:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-10-28 09:54:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-28 09:54:51,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2021-10-28 09:54:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:51,844 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-28 09:54:51,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-28 09:54:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:54:51,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:51,845 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:51,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:52,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:52,071 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash -576050119, now seen corresponding path program 2 times [2021-10-28 09:54:52,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:52,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411079653] [2021-10-28 09:54:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:52,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:52,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:52,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145022055] [2021-10-28 09:54:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:54:52,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:52,097 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:52,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:54:52,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:54:52,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:54:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:54:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:54:54,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:54,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411079653] [2021-10-28 09:54:54,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:54,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145022055] [2021-10-28 09:54:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145022055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:54,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:54,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:54:54,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091448526] [2021-10-28 09:54:54,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:54:54,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:54:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:54:54,578 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:54:54,969 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-10-28 09:54:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:54:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-28 09:54:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:54:54,971 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:54:54,971 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:54:54,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:54:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:54:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-10-28 09:54:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-28 09:54:54,978 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-10-28 09:54:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:54:54,978 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-28 09:54:54,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:54:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-28 09:54:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:54:54,979 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:54:54,979 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:54:55,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:54:55,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:54:55,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:54:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:54:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash 322246368, now seen corresponding path program 3 times [2021-10-28 09:54:55,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:54:55,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302296705] [2021-10-28 09:54:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:54:55,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:54:55,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:54:55,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112281018] [2021-10-28 09:54:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:54:55,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:54:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:54:55,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:54:55,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:54:55,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:54:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:54:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:54:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:54:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:54:56,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:54:56,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302296705] [2021-10-28 09:54:56,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:54:56,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112281018] [2021-10-28 09:54:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112281018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:54:56,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:54:56,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:54:56,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91820394] [2021-10-28 09:54:56,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:54:56,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:54:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:54:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:54:56,935 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:55:14,222 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-28 09:55:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:55:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-10-28 09:55:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:55:14,224 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:55:14,224 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 09:55:14,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:55:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 09:55:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-28 09:55:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 09:55:14,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2021-10-28 09:55:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:55:14,232 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 09:55:14,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 09:55:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:55:14,233 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:55:14,233 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:55:14,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:55:14,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:55:14,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:55:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:55:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1350644320, now seen corresponding path program 3 times [2021-10-28 09:55:14,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:55:14,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719643458] [2021-10-28 09:55:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:55:14,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:55:14,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:55:14,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684956757] [2021-10-28 09:55:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:55:14,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:55:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:55:14,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:55:14,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:55:14,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:55:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:55:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 09:55:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:55:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:55:16,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:55:16,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719643458] [2021-10-28 09:55:16,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:55:16,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684956757] [2021-10-28 09:55:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684956757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:55:16,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:55:16,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:55:16,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803194068] [2021-10-28 09:55:16,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:55:16,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:55:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:55:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:55:16,238 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:55:18,607 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-10-28 09:55:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:55:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-10-28 09:55:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:55:18,608 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:55:18,608 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:55:18,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:55:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:55:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 09:55:18,613 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) [2021-10-28 09:55:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-28 09:55:18,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 26 [2021-10-28 09:55:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:55:18,614 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-28 09:55:18,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-28 09:55:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:55:18,615 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:55:18,615 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:55:18,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:55:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:55:18,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:55:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:55:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1348797278, now seen corresponding path program 3 times [2021-10-28 09:55:18,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:55:18,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023435621] [2021-10-28 09:55:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:55:18,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:55:18,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:55:18,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723408776] [2021-10-28 09:55:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:55:18,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:55:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:55:18,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:55:18,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:55:19,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:55:19,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:55:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:55:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:55:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:55:31,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:55:31,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023435621] [2021-10-28 09:55:31,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:55:31,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723408776] [2021-10-28 09:55:31,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723408776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:55:31,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:55:31,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 09:55:31,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089607115] [2021-10-28 09:55:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:55:31,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:55:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:55:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=137, Unknown=1, NotChecked=0, Total=182 [2021-10-28 09:55:31,730 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:55:41,803 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-28 09:55:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:55:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-10-28 09:55:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:55:41,804 INFO L225 Difference]: With dead ends: 38 [2021-10-28 09:55:41,805 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:55:41,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=151, Invalid=448, Unknown=1, NotChecked=0, Total=600 [2021-10-28 09:55:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:55:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-28 09:55:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-28 09:55:41,812 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2021-10-28 09:55:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:55:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-28 09:55:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:55:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-28 09:55:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:55:41,814 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:55:41,814 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:55:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:55:42,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:55:42,031 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:55:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:55:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 920192473, now seen corresponding path program 4 times [2021-10-28 09:55:42,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:55:42,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914450191] [2021-10-28 09:55:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:55:42,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:55:42,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:55:42,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238982128] [2021-10-28 09:55:42,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:55:42,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:55:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:55:42,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:55:42,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:55:42,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:55:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:55:42,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:55:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:56:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:56:39,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:56:39,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914450191] [2021-10-28 09:56:39,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:56:39,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238982128] [2021-10-28 09:56:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238982128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:56:39,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:56:39,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 09:56:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844714413] [2021-10-28 09:56:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:56:39,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:56:39,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:56:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:56:39,670 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:56:40,912 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-10-28 09:56:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:56:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 09:56:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:56:40,913 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:56:40,913 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:56:40,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:56:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:56:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-10-28 09:56:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-28 09:56:40,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2021-10-28 09:56:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:56:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-28 09:56:40,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-28 09:56:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 09:56:40,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:56:40,924 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:56:40,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:56:41,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:56:41,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:56:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:56:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1070802690, now seen corresponding path program 5 times [2021-10-28 09:56:41,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:56:41,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030114938] [2021-10-28 09:56:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:56:41,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:56:41,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:56:41,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213568794] [2021-10-28 09:56:41,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:56:41,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:56:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:56:41,161 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:56:41,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:56:41,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:56:41,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:56:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:56:41,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:56:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:56:42,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:56:42,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030114938] [2021-10-28 09:56:42,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:56:42,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213568794] [2021-10-28 09:56:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213568794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:56:42,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:56:42,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-28 09:56:42,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258525970] [2021-10-28 09:56:42,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:56:42,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:56:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:56:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:56:42,088 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:56:42,602 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-28 09:56:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:56:42,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-28 09:56:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:56:42,611 INFO L225 Difference]: With dead ends: 39 [2021-10-28 09:56:42,611 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:56:42,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:56:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:56:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:56:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:56:42,613 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-10-28 09:56:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:56:42,614 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:56:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:56:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:56:42,614 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:56:42,617 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:56:42,617 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:56:42,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:56:42,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:56:42,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:56:42,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:56:43,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:56:43,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:56:43,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:56:55,434 WARN L207 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 183 DAG size of output: 48 [2021-10-28 09:58:51,098 WARN L207 SmtUtils]: Spent 1.93 m on a formula simplification. DAG size of input: 238 DAG size of output: 172 [2021-10-28 09:58:51,104 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-28 09:58:51,104 INFO L860 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2021-10-28 09:58:51,104 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:58:51,104 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:58:51,105 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:58:51,105 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-28 09:58:51,105 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:58:51,105 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-10-28 09:58:51,106 INFO L853 garLoopResultBuilder]: At program point L13-2(lines 36 37) the Hoare annotation is: (let ((.cse6 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0))) (let ((.cse2 (<= ULTIMATE.start_main_~b~0 20)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= .cse6 (+ ULTIMATE.start_main_~z~0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)))) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse4 (<= 1 ULTIMATE.start_main_~b~0)) (.cse5 (or (= .cse6 ULTIMATE.start_main_~z~0) (and (not (= ULTIMATE.start_main_~y~0 0)) (= (mod (+ .cse6 (* ULTIMATE.start_main_~z~0 (- 1))) ULTIMATE.start_main_~y~0) 0))))) (or (and (= ULTIMATE.start_main_~z~0 0) .cse0 .cse1 (< ULTIMATE.start_main_~y~0 2) .cse2 .cse3 .cse4 (< 0 ULTIMATE.start_main_~y~0) .cse5) (and (< 0 (+ ULTIMATE.start_main_~y~0 1)) .cse0 .cse1 .cse2 .cse3 (= (mod ULTIMATE.start_main_~x~0 (- 2)) 0) .cse4 .cse5) (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse3 .cse4 (<= ULTIMATE.start_main_~y~0 20) .cse5 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0))))) [2021-10-28 09:58:51,106 INFO L857 garLoopResultBuilder]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2021-10-28 09:58:51,106 INFO L857 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-10-28 09:58:51,106 INFO L857 garLoopResultBuilder]: For program point L9-1(lines 9 11) no Hoare annotation was computed. [2021-10-28 09:58:51,106 INFO L860 garLoopResultBuilder]: At program point L13-5(lines 12 18) the Hoare annotation is: true [2021-10-28 09:58:51,107 INFO L857 garLoopResultBuilder]: For program point L9-2(lines 9 11) no Hoare annotation was computed. [2021-10-28 09:58:51,107 INFO L853 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse9 (div ULTIMATE.start_main_~b~0 2))) (let ((.cse38 (div .cse9 2)) (.cse6 (mod ULTIMATE.start_main_~b~0 2)) (.cse12 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse17 (div (* ULTIMATE.start_main_~x~0 (- 1)) (- 2)))) (let ((.cse16 (* ULTIMATE.start_main_~z~0 (- 1))) (.cse24 (* (- 1) ULTIMATE.start_main_~z~0)) (.cse25 (= .cse12 (+ ULTIMATE.start_main_~z~0 (* 2 (* .cse17 ULTIMATE.start_main_~y~0))))) (.cse13 (= (mod ULTIMATE.start_main_~x~0 (- 2)) 0)) (.cse11 (= ULTIMATE.start_main_~x~0 (* 4 ULTIMATE.start_main_~a~0))) (.cse10 (<= 1 ULTIMATE.start_main_~b~0)) (.cse7 (= ULTIMATE.start_main_~z~0 0)) (.cse8 (not (= .cse6 1))) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse5 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse37 (not (= (mod .cse9 2) 1))) (.cse0 (<= ULTIMATE.start_main_~b~0 20)) (.cse30 (div .cse38 2)) (.cse36 (< 0 ULTIMATE.start_main_~y~0))) (or (and (<= 0 ULTIMATE.start_main_~b~0) .cse0 (let ((.cse4 (div (+ (- 1) ULTIMATE.start_main_~b~0) 2))) (let ((.cse3 (* 2 ULTIMATE.start_main_~a~0)) (.cse1 (mod .cse4 2))) (or (and (<= 1 .cse1) .cse2 (= (+ ULTIMATE.start_main_~x~0 .cse3) (* 2 ULTIMATE.start_main_~z~0)) (= ULTIMATE.start_main_~z~0 (* 3 ULTIMATE.start_main_~a~0)) (= ULTIMATE.start_main_~y~0 (div (+ (- 1) .cse4) 2)) .cse5 (<= 1 .cse6)) (and .cse7 .cse8 .cse2 (= ULTIMATE.start_main_~x~0 .cse3) .cse5 (= ULTIMATE.start_main_~y~0 .cse9) .cse10) (and .cse2 .cse5 .cse11 (= ULTIMATE.start_main_~y~0 (div .cse4 2)) (not (= .cse1 1)) (= .cse12 (+ (* 2 (* ULTIMATE.start_main_~a~0 .cse4)) ULTIMATE.start_main_~z~0))))))) (and .cse2 .cse5 .cse0 .cse13 .cse10 (let ((.cse14 (= .cse17 0))) (or (let ((.cse15 (* (- 2) .cse17 ULTIMATE.start_main_~y~0))) (let ((.cse18 (div (+ .cse12 .cse15 .cse24) .cse17))) (and (not .cse14) (= (mod (+ .cse12 .cse15 .cse16) .cse17) 0) (<= 0 .cse18) (< .cse18 2) (exists ((aux_div_v_ULTIMATE.start_main_~y~0_34_43 Int)) (let ((.cse21 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse22 (div (* ULTIMATE.start_main_~x~0 (- 1)) (- 2)))) (let ((.cse23 (div (+ .cse21 (* (- 2) .cse22 ULTIMATE.start_main_~y~0) (* (- 1) ULTIMATE.start_main_~z~0)) .cse22))) (let ((.cse20 (* 2 aux_div_v_ULTIMATE.start_main_~y~0_34_43)) (.cse19 (+ .cse23 (* 2 ULTIMATE.start_main_~y~0)))) (and (< .cse19 (+ .cse20 1)) (= .cse21 (+ (* 2 (* .cse22 ULTIMATE.start_main_~y~0)) .cse22 (* .cse23 .cse22))) (<= .cse20 .cse19))))))))) (and .cse25 .cse14))) (exists ((aux_div_v_ULTIMATE.start_main_~y~0_29_43 Int) (aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 Int)) (let ((.cse28 (* 2 ULTIMATE.start_main_~y~0))) (let ((.cse27 (+ aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 .cse28)) (.cse26 (* 2 aux_div_v_ULTIMATE.start_main_~y~0_29_43))) (and (<= .cse26 .cse27) (< aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 2) (< .cse27 (+ .cse26 1)) (<= 0 (+ aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 .cse28 1)) (<= 0 aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105)))))) (and .cse2 (= .cse12 (+ ULTIMATE.start_main_~z~0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse10 (<= ULTIMATE.start_main_~y~0 20) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (let ((.cse35 (div ULTIMATE.start_main_~x~0 2))) (let ((.cse34 (* (- 2) ULTIMATE.start_main_~y~0 .cse35))) (let ((.cse29 (div (+ .cse12 .cse34 .cse24) .cse35))) (and (= (* 8 ULTIMATE.start_main_~a~0) ULTIMATE.start_main_~x~0) (< (div (* .cse9 (- 1)) (- 2)) (+ (* 2 ULTIMATE.start_main_~y~0) 1 .cse29)) .cse8 .cse2 (= ULTIMATE.start_main_~y~0 .cse30) .cse5 (exists ((aux_div_v_ULTIMATE.start_main_~y~0_37_37 Int)) (let ((.cse32 (* 2 aux_div_v_ULTIMATE.start_main_~y~0_37_37)) (.cse31 (+ (* 2 ULTIMATE.start_main_~y~0) (let ((.cse33 (div ULTIMATE.start_main_~x~0 2))) (div (+ (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0) (* (- 2) ULTIMATE.start_main_~y~0 .cse33) (* (- 1) ULTIMATE.start_main_~z~0)) .cse33))))) (and (< .cse31 (+ 2 .cse32)) (<= .cse32 .cse31) (not (= (+ .cse32 1) .cse31))))) (= (mod (+ .cse12 .cse16 .cse34) .cse35) 0) (not (= .cse35 0)) (< .cse29 2) .cse36 (< ULTIMATE.start_main_~y~0 3))))) (and (< 0 (+ ULTIMATE.start_main_~y~0 1)) .cse2 (= (mod (div (- ULTIMATE.start_main_~x~0) (- 2)) (- 2)) 0) .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse25 .cse13 .cse10) (and .cse7 .cse8 .cse2 .cse5 .cse37 .cse0 (= ULTIMATE.start_main_~y~0 .cse38) .cse11 .cse10) (and .cse7 .cse8 .cse2 .cse5 .cse37 (= ULTIMATE.start_main_~x~0 (* 16 ULTIMATE.start_main_~a~0)) .cse0 (= (div .cse30 2) ULTIMATE.start_main_~y~0) (not (= (mod .cse38 2) 1)) .cse36))))) [2021-10-28 09:58:51,108 INFO L857 garLoopResultBuilder]: For program point L34-3(lines 34 45) no Hoare annotation was computed. [2021-10-28 09:58:51,108 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-10-28 09:58:51,108 INFO L857 garLoopResultBuilder]: For program point L14-1(lines 14 15) no Hoare annotation was computed. [2021-10-28 09:58:51,108 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-10-28 09:58:51,108 INFO L857 garLoopResultBuilder]: For program point L10-2(line 10) no Hoare annotation was computed. [2021-10-28 09:58:51,109 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-10-28 09:58:51,109 INFO L857 garLoopResultBuilder]: For program point L10-4(line 10) no Hoare annotation was computed. [2021-10-28 09:58:51,109 INFO L857 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2021-10-28 09:58:51,113 INFO L731 BasicCegarLoop]: Path program histogram: [5, 3, 3, 1, 1, 1, 1] [2021-10-28 09:58:51,115 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:58:51,140 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,141 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,141 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,142 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,142 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,142 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,143 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,143 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,143 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,144 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,144 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,144 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,152 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,154 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,154 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,154 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,154 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,155 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,155 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,155 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,156 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:58:51 BoogieIcfgContainer [2021-10-28 09:58:51,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:58:51,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:58:51,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:58:51,165 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:58:51,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:54:13" (3/4) ... [2021-10-28 09:58:51,169 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:58:51,183 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-28 09:58:51,183 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:58:51,184 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:58:51,184 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:58:51,215 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((0 <= b && b <= 20) && ((((((((1 <= (-1 + b) / 2 % 2 && cond == 1) && x + 2 * a == 2 * z) && z == 3 * a) && y == (-1 + (-1 + b) / 2) / 2) && 1 <= cond) && 1 <= b % 2) || ((((((z == 0 && !(b % 2 == 1)) && cond == 1) && x == 2 * a) && 1 <= cond) && y == b / 2) && 1 <= b)) || (((((cond == 1 && 1 <= cond) && x == 4 * a) && y == (-1 + b) / 2 / 2) && !((-1 + b) / 2 % 2 == 1)) && a * b == 2 * (a * ((-1 + b) / 2)) + z))) || ((((((cond == 1 && 1 <= cond) && b <= 20) && x % -2 == 0) && 1 <= b) && (((((!(x * -1 / -2 == 0) && (a * b + -2 * (x * -1 / -2) * y + z * -1) % (x * -1 / -2) == 0) && 0 <= (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2)) && (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) < 2) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_34_43 : int :: ((a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) + 2 * y < 2 * aux_div_v_ULTIMATE.start_main_~y~0_34_43 + 1 && a * b == 2 * (x * -1 / -2 * y) + x * -1 / -2 + (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) * (x * -1 / -2)) && 2 * aux_div_v_ULTIMATE.start_main_~y~0_34_43 <= (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) + 2 * y)) || (a * b == z + 2 * (x * -1 / -2 * y) && x * -1 / -2 == 0))) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_29_43 : int, aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 : int :: (((2 * aux_div_v_ULTIMATE.start_main_~y~0_29_43 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y && aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 < 2) && aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y < 2 * aux_div_v_ULTIMATE.start_main_~y~0_29_43 + 1) && 0 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y + 1) && 0 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105))) || (((((cond == 1 && a * b == z + x * y) && a == x) && 1 <= b) && y <= 20) && b == y)) || (((((((((((8 * a == x && b / 2 * -1 / -2 < 2 * y + 1 + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)) && !(b % 2 == 1)) && cond == 1) && y == b / 2 / 2 / 2) && 1 <= cond) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_37_37 : int :: (2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2) < 2 + 2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 && 2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 <= 2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)) && !(2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 + 1 == 2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)))) && (a * b + z * -1 + -2 * y * (x / 2)) % (x / 2) == 0) && !(x / 2 == 0)) && (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2) < 2) && 0 < y) && y < 3)) || (((((((0 < y + 1 && cond == 1) && -x / -2 % -2 == 0) && b <= 20) && 1 == cond) && a * b == z + 2 * (x * -1 / -2 * y)) && x % -2 == 0) && 1 <= b)) || ((((((((z == 0 && !(b % 2 == 1)) && cond == 1) && 1 <= cond) && !(b / 2 % 2 == 1)) && b <= 20) && y == b / 2 / 2) && x == 4 * a) && 1 <= b)) || (((((((((z == 0 && !(b % 2 == 1)) && cond == 1) && 1 <= cond) && !(b / 2 % 2 == 1)) && x == 16 * a) && b <= 20) && b / 2 / 2 / 2 / 2 == y) && !(b / 2 / 2 % 2 == 1)) && 0 < y) [2021-10-28 09:58:51,228 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:58:51,228 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:58:51,230 INFO L168 Benchmark]: Toolchain (without parser) took 278831.66 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 98.2 MB in the beginning and 75.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 49.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,230 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:58:51,231 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.61 ms. Allocated memory is still 130.0 MB. Free memory was 97.8 MB in the beginning and 104.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 130.0 MB. Free memory was 104.9 MB in the beginning and 103.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,232 INFO L168 Benchmark]: Boogie Preprocessor took 21.99 ms. Allocated memory is still 130.0 MB. Free memory was 103.3 MB in the beginning and 102.5 MB in the end (delta: 809.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:58:51,232 INFO L168 Benchmark]: RCFGBuilder took 379.95 ms. Allocated memory is still 130.0 MB. Free memory was 102.5 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,233 INFO L168 Benchmark]: TraceAbstraction took 277996.92 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.6 MB in the beginning and 78.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 83.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,233 INFO L168 Benchmark]: Witness Printer took 63.88 ms. Allocated memory is still 157.3 MB. Free memory was 78.7 MB in the beginning and 75.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:58:51,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.61 ms. Allocated memory is still 130.0 MB. Free memory was 97.8 MB in the beginning and 104.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 130.0 MB. Free memory was 104.9 MB in the beginning and 103.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.99 ms. Allocated memory is still 130.0 MB. Free memory was 103.3 MB in the beginning and 102.5 MB in the end (delta: 809.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 379.95 ms. Allocated memory is still 130.0 MB. Free memory was 102.5 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 277996.92 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.6 MB in the beginning and 78.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 83.3 MB. Max. memory is 16.1 GB. * Witness Printer took 63.88 ms. Allocated memory is still 157.3 MB. Free memory was 78.7 MB in the beginning and 75.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 277.8s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 40.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 128.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 416 SDslu, 487 SDs, 0 SdLazy, 1498 SolverSat, 134 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 18.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 381 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 26.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=14, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 83 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 27 NumberOfFragments, 912 HoareAnnotationTreeSize, 4 FomulaSimplifications, 31834 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 13155 FormulaSimplificationTreeSizeReductionInter, 128.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 103.2s InterpolantComputationTime, 316 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 301 ConstructedInterpolants, 6 QuantifiedInterpolants, 3881 SizeOfPredicates, 110 NumberOfNonLiveVariables, 1249 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 95/204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((z == 0 && cond == 1) && a * b == z + x * y) && y < 2) && b <= 20) && 1 == cond) && 1 <= b) && 0 < y) && (a * b == z || (!(y == 0) && (a * b + z * -1) % y == 0))) || (((((((0 < y + 1 && cond == 1) && a * b == z + x * y) && b <= 20) && 1 == cond) && x % -2 == 0) && 1 <= b) && (a * b == z || (!(y == 0) && (a * b + z * -1) % y == 0)))) || (((((((cond == 1 && a * b == z + x * y) && a == x) && 1 == cond) && 1 <= b) && y <= 20) && (a * b == z || (!(y == 0) && (a * b + z * -1) % y == 0))) && b == y) - InvariantResult [Line: 34]: Loop Invariant [2021-10-28 09:58:51,250 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,251 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,251 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,251 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,251 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,253 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,253 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,253 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,256 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,257 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_34_43,QUANTIFIED] [2021-10-28 09:58:51,257 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,257 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,257 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,258 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,258 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_29_43,QUANTIFIED] [2021-10-28 09:58:51,258 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,258 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105,QUANTIFIED] [2021-10-28 09:58:51,259 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,259 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] [2021-10-28 09:58:51,259 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0_37_37,QUANTIFIED] Derived loop invariant: (((((((0 <= b && b <= 20) && ((((((((1 <= (-1 + b) / 2 % 2 && cond == 1) && x + 2 * a == 2 * z) && z == 3 * a) && y == (-1 + (-1 + b) / 2) / 2) && 1 <= cond) && 1 <= b % 2) || ((((((z == 0 && !(b % 2 == 1)) && cond == 1) && x == 2 * a) && 1 <= cond) && y == b / 2) && 1 <= b)) || (((((cond == 1 && 1 <= cond) && x == 4 * a) && y == (-1 + b) / 2 / 2) && !((-1 + b) / 2 % 2 == 1)) && a * b == 2 * (a * ((-1 + b) / 2)) + z))) || ((((((cond == 1 && 1 <= cond) && b <= 20) && x % -2 == 0) && 1 <= b) && (((((!(x * -1 / -2 == 0) && (a * b + -2 * (x * -1 / -2) * y + z * -1) % (x * -1 / -2) == 0) && 0 <= (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2)) && (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) < 2) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_34_43 : int :: ((a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) + 2 * y < 2 * aux_div_v_ULTIMATE.start_main_~y~0_34_43 + 1 && a * b == 2 * (x * -1 / -2 * y) + x * -1 / -2 + (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) * (x * -1 / -2)) && 2 * aux_div_v_ULTIMATE.start_main_~y~0_34_43 <= (a * b + -2 * (x * -1 / -2) * y + -1 * z) / (x * -1 / -2) + 2 * y)) || (a * b == z + 2 * (x * -1 / -2 * y) && x * -1 / -2 == 0))) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_29_43 : int, aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 : int :: (((2 * aux_div_v_ULTIMATE.start_main_~y~0_29_43 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y && aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 < 2) && aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y < 2 * aux_div_v_ULTIMATE.start_main_~y~0_29_43 + 1) && 0 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105 + 2 * y + 1) && 0 <= aux_mod_aux_mod_v_ULTIMATE.start_main_~y~0_29_43_105))) || (((((cond == 1 && a * b == z + x * y) && a == x) && 1 <= b) && y <= 20) && b == y)) || (((((((((((8 * a == x && b / 2 * -1 / -2 < 2 * y + 1 + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)) && !(b % 2 == 1)) && cond == 1) && y == b / 2 / 2 / 2) && 1 <= cond) && (\exists aux_div_v_ULTIMATE.start_main_~y~0_37_37 : int :: (2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2) < 2 + 2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 && 2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 <= 2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)) && !(2 * aux_div_v_ULTIMATE.start_main_~y~0_37_37 + 1 == 2 * y + (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2)))) && (a * b + z * -1 + -2 * y * (x / 2)) % (x / 2) == 0) && !(x / 2 == 0)) && (a * b + -2 * y * (x / 2) + -1 * z) / (x / 2) < 2) && 0 < y) && y < 3)) || (((((((0 < y + 1 && cond == 1) && -x / -2 % -2 == 0) && b <= 20) && 1 == cond) && a * b == z + 2 * (x * -1 / -2 * y)) && x % -2 == 0) && 1 <= b)) || ((((((((z == 0 && !(b % 2 == 1)) && cond == 1) && 1 <= cond) && !(b / 2 % 2 == 1)) && b <= 20) && y == b / 2 / 2) && x == 4 * a) && 1 <= b)) || (((((((((z == 0 && !(b % 2 == 1)) && cond == 1) && 1 <= cond) && !(b / 2 % 2 == 1)) && x == 16 * a) && b <= 20) && b / 2 / 2 / 2 / 2 == y) && !(b / 2 / 2 % 2 == 1)) && 0 < y) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 09:58:51,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cab283a-192d-4af4-8a54-6b612966ff67/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...