./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:27:22,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:27:22,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:27:22,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:27:22,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:27:22,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:27:22,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:27:22,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:27:22,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:27:22,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:27:22,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:27:22,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:27:22,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:27:22,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:27:22,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:27:22,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:27:22,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:27:22,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:27:22,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:27:22,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:27:22,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:27:22,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:27:22,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:27:22,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:27:22,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:27:22,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:27:22,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:27:22,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:27:22,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:27:22,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:27:22,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:27:22,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:27:22,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:27:22,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:27:22,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:27:22,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:27:22,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:27:22,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:27:22,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:27:22,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:27:22,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:27:22,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:27:22,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:27:22,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:27:22,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:27:22,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:27:22,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:27:22,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:27:22,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:27:22,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:27:22,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:27:22,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:27:22,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:27:22,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:27:22,845 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:27:22,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:27:22,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:27:22,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:27:22,846 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_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 [2021-12-06 17:27:23,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:27:23,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:27:23,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:27:23,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:27:23,040 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:27:23,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-12-06 17:27:23,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/data/a1e4fb9e7/87337329b564449891b498f912449ee0/FLAG33007b238 [2021-12-06 17:27:23,420 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:27:23,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-12-06 17:27:23,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/data/a1e4fb9e7/87337329b564449891b498f912449ee0/FLAG33007b238 [2021-12-06 17:27:23,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/data/a1e4fb9e7/87337329b564449891b498f912449ee0 [2021-12-06 17:27:23,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:27:23,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:27:23,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:23,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:27:23,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:27:23,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69eb092f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23, skipping insertion in model container [2021-12-06 17:27:23,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:27:23,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:27:23,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-12-06 17:27:23,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:23,577 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:27:23,586 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-12-06 17:27:23,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:23,598 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:27:23,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23 WrapperNode [2021-12-06 17:27:23,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:23,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:23,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:27:23,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:27:23,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,621 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2021-12-06 17:27:23,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:23,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:27:23,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:27:23,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:27:23,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:27:23,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:27:23,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:27:23,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:27:23,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (1/1) ... [2021-12-06 17:27:23,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:27:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:23,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:27:23,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:27:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:27:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:27:23,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:27:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:27:23,734 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:27:23,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:27:23,798 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:27:23,802 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:27:23,802 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:27:23,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:23 BoogieIcfgContainer [2021-12-06 17:27:23,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:27:23,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:27:23,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:27:23,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:27:23,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:27:23" (1/3) ... [2021-12-06 17:27:23,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3608d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:23, skipping insertion in model container [2021-12-06 17:27:23,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:23" (2/3) ... [2021-12-06 17:27:23,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3608d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:23, skipping insertion in model container [2021-12-06 17:27:23,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:23" (3/3) ... [2021-12-06 17:27:23,809 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2021-12-06 17:27:23,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:27:23,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:27:23,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:27:23,854 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:27:23,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:27:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 17:27:23,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:23,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:27:23,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:23,873 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-06 17:27:23,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145352072] [2021-12-06 17:27:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:23,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:23,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145352072] [2021-12-06 17:27:23,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145352072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:23,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:23,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:23,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189427604] [2021-12-06 17:27:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:23,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:27:23,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:27:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:27:23,998 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:24,011 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-06 17:27:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:27:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 17:27:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:24,020 INFO L225 Difference]: With dead ends: 20 [2021-12-06 17:27:24,020 INFO L226 Difference]: Without dead ends: 8 [2021-12-06 17:27:24,023 INFO L932 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 [2021-12-06 17:27:24,027 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:24,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-06 17:27:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-06 17:27:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-12-06 17:27:24,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-12-06 17:27:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:24,052 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-06 17:27:24,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-12-06 17:27:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 17:27:24,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:24,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:27:24,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:27:24,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-12-06 17:27:24,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57203285] [2021-12-06 17:27:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:24,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57203285] [2021-12-06 17:27:24,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57203285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:24,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:24,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:24,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211686229] [2021-12-06 17:27:24,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:24,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:24,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:24,120 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:24,132 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-12-06 17:27:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 17:27:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:24,134 INFO L225 Difference]: With dead ends: 14 [2021-12-06 17:27:24,134 INFO L226 Difference]: Without dead ends: 10 [2021-12-06 17:27:24,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:24,136 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:24,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-06 17:27:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-12-06 17:27:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-06 17:27:24,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-06 17:27:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-06 17:27:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-06 17:27:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:27:24,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:24,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:24,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:27:24,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-12-06 17:27:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344269345] [2021-12-06 17:27:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:24,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344269345] [2021-12-06 17:27:24,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344269345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512454633] [2021-12-06 17:27:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:24,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:24,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:24,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:27:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:27:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512454633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:24,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:24,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 17:27:24,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511935418] [2021-12-06 17:27:24,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:24,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:27:24,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:27:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:27:24,305 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:24,359 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-12-06 17:27:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:27:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 8 [2021-12-06 17:27:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:24,361 INFO L225 Difference]: With dead ends: 21 [2021-12-06 17:27:24,361 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 17:27:24,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:27:24,362 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:24,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 17:27:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-12-06 17:27:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-12-06 17:27:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-12-06 17:27:24,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2021-12-06 17:27:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:24,366 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-12-06 17:27:24,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-12-06 17:27:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:27:24,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:24,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:24,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:24,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 2 times [2021-12-06 17:27:24,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782265442] [2021-12-06 17:27:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:24,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782265442] [2021-12-06 17:27:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782265442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040078462] [2021-12-06 17:27:24,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:27:24,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:24,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:24,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:27:24,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:27:24,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:27:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:24,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040078462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:24,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:24,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 17:27:24,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689768000] [2021-12-06 17:27:24,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:24,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:27:24,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:27:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:27:24,969 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-12-06 17:27:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:25,275 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-12-06 17:27:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:27:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 14 [2021-12-06 17:27:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:25,276 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:27:25,276 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 17:27:25,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:27:25,278 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:25,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:27:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 17:27:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-12-06 17:27:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2021-12-06 17:27:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-12-06 17:27:25,283 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2021-12-06 17:27:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:25,283 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-12-06 17:27:25,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-12-06 17:27:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-12-06 17:27:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:27:25,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:25,284 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:25,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:27:25,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:25,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1371031502, now seen corresponding path program 1 times [2021-12-06 17:27:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:25,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874639446] [2021-12-06 17:27:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:25,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:27:25,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874639446] [2021-12-06 17:27:25,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874639446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:25,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:25,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:25,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413224055] [2021-12-06 17:27:25,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:25,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:25,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:25,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:25,520 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:25,529 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2021-12-06 17:27:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 20 [2021-12-06 17:27:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:25,530 INFO L225 Difference]: With dead ends: 59 [2021-12-06 17:27:25,531 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 17:27:25,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:25,532 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:25,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 17:27:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-12-06 17:27:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-06 17:27:25,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2021-12-06 17:27:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:25,538 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-06 17:27:25,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-06 17:27:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:27:25,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:25,539 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:27:25,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 1 times [2021-12-06 17:27:25,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569810113] [2021-12-06 17:27:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:25,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569810113] [2021-12-06 17:27:25,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569810113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077379447] [2021-12-06 17:27:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:25,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:25,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:25,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:27:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:27:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:25,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077379447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:25,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:25,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 17:27:25,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575381576] [2021-12-06 17:27:25,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:25,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:27:25,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:27:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:27:25,862 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:26,857 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-12-06 17:27:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:27:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:27:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:26,859 INFO L225 Difference]: With dead ends: 119 [2021-12-06 17:27:26,859 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 17:27:26,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:27:26,860 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:26,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:27:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 17:27:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 58. [2021-12-06 17:27:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-06 17:27:26,869 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 20 [2021-12-06 17:27:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:26,869 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-06 17:27:26,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-06 17:27:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:27:26,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:26,871 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:26,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:27:27,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:27:27,072 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1066218333, now seen corresponding path program 3 times [2021-12-06 17:27:27,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:27,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109944963] [2021-12-06 17:27:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:27,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:27,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109944963] [2021-12-06 17:27:27,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109944963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136089634] [2021-12-06 17:27:27,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:27:27,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:27,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:27,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:27:27,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 17:27:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:27,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:27:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:27,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:27,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136089634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:27,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:27,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 17:27:27,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488565722] [2021-12-06 17:27:27,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:27:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:27:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:27:27,619 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:31,204 INFO L93 Difference]: Finished difference Result 201 states and 247 transitions. [2021-12-06 17:27:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 17:27:31,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 17:27:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:31,206 INFO L225 Difference]: With dead ends: 201 [2021-12-06 17:27:31,206 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 17:27:31,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:27:31,207 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:31,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:27:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 17:27:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 82. [2021-12-06 17:27:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 81 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-12-06 17:27:31,218 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 26 [2021-12-06 17:27:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:31,218 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-12-06 17:27:31,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-12-06 17:27:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:27:31,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:31,220 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:31,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:27:31,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:31,422 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash -477339582, now seen corresponding path program 2 times [2021-12-06 17:27:31,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313447397] [2021-12-06 17:27:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:31,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-06 17:27:31,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313447397] [2021-12-06 17:27:31,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313447397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:31,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:31,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109242003] [2021-12-06 17:27:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:31,477 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:31,486 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-12-06 17:27:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 [2021-12-06 17:27:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:31,487 INFO L225 Difference]: With dead ends: 117 [2021-12-06 17:27:31,487 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 17:27:31,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:31,488 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:31,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 17:27:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-12-06 17:27:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-06 17:27:31,497 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 36 [2021-12-06 17:27:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:31,497 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-06 17:27:31,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-06 17:27:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:27:31,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:31,498 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:31,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:27:31,498 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:31,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 2 times [2021-12-06 17:27:31,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000150614] [2021-12-06 17:27:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:31,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:31,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000150614] [2021-12-06 17:27:31,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000150614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921750218] [2021-12-06 17:27:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:27:31,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:31,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:31,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:27:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:27:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:27:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:31,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:32,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921750218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:32,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:32,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-06 17:27:32,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133401008] [2021-12-06 17:27:32,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:32,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:27:32,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:27:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=938, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:27:32,240 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:51,613 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2021-12-06 17:27:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:27:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 17:27:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:51,615 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:27:51,615 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 17:27:51,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=986, Invalid=1770, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 17:27:51,616 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:51,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 66 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:27:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 17:27:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-06 17:27:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-12-06 17:27:51,626 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 38 [2021-12-06 17:27:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:51,626 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-12-06 17:27:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-12-06 17:27:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 17:27:51,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:51,628 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:51,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:27:51,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:51,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1301187105, now seen corresponding path program 4 times [2021-12-06 17:27:51,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:51,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454897258] [2021-12-06 17:27:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:51,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:52,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:52,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454897258] [2021-12-06 17:27:52,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454897258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:52,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273543363] [2021-12-06 17:27:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:27:52,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:52,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:52,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:27:52,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:27:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:27:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:52,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:53,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273543363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:53,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:53,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-06 17:27:53,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602555389] [2021-12-06 17:27:53,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:53,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:27:53,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:27:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 17:27:53,008 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:22,971 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2021-12-06 17:29:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:29:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-06 17:29:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:22,973 INFO L225 Difference]: With dead ends: 170 [2021-12-06 17:29:22,973 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 17:29:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 89.5s TimeCoverageRelationStatistics Valid=1747, Invalid=3222, Unknown=1, NotChecked=0, Total=4970 [2021-12-06 17:29:22,975 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:22,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 75 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:29:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 17:29:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-06 17:29:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2021-12-06 17:29:22,986 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 50 [2021-12-06 17:29:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:22,986 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2021-12-06 17:29:22,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2021-12-06 17:29:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 17:29:22,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:22,988 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:23,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:29:23,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:29:23,190 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 3 times [2021-12-06 17:29:23,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134188410] [2021-12-06 17:29:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:23,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:23,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134188410] [2021-12-06 17:29:23,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134188410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867900614] [2021-12-06 17:29:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:29:23,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:23,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:23,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:23,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:29:24,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-12-06 17:29:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:29:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 17:29:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 17:29:25,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867900614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:29:25,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:29:25,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 6] total 42 [2021-12-06 17:29:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027777610] [2021-12-06 17:29:25,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:29:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:29:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:29:25,210 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:26,482 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2021-12-06 17:29:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 17:29:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 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 74 [2021-12-06 17:29:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:26,483 INFO L225 Difference]: With dead ends: 181 [2021-12-06 17:29:26,483 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 17:29:26,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:29:26,485 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:26,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:29:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 17:29:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2021-12-06 17:29:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-06 17:29:26,496 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 74 [2021-12-06 17:29:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:26,496 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-06 17:29:26,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-06 17:29:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:29:26,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:26,497 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:26,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:29:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:26,699 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 4 times [2021-12-06 17:29:26,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:26,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990757483] [2021-12-06 17:29:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:26,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:27,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990757483] [2021-12-06 17:29:27,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990757483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680109726] [2021-12-06 17:29:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:29:27,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:27,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:27,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:29:27,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:29:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:29:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:29:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:27,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:29,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680109726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:29:29,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:29:29,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2021-12-06 17:29:29,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616163755] [2021-12-06 17:29:29,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:29,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 17:29:29,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:29,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 17:29:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=4035, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 17:29:29,255 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:42,816 INFO L93 Difference]: Finished difference Result 248 states and 268 transitions. [2021-12-06 17:37:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 17:37:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 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 76 [2021-12-06 17:37:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:42,818 INFO L225 Difference]: With dead ends: 248 [2021-12-06 17:37:42,818 INFO L226 Difference]: Without dead ends: 244 [2021-12-06 17:37:42,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 493.2s TimeCoverageRelationStatistics Valid=4128, Invalid=7849, Unknown=13, NotChecked=0, Total=11990 [2021-12-06 17:37:42,821 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:42,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 3459 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:37:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-06 17:37:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-12-06 17:37:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2021-12-06 17:37:42,834 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 76 [2021-12-06 17:37:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2021-12-06 17:37:42,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2021-12-06 17:37:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:37:42,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:42,836 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:42,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 17:37:43,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:37:43,038 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:37:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1635773527, now seen corresponding path program 5 times [2021-12-06 17:37:43,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:43,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168281593] [2021-12-06 17:37:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:43,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:43,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:43,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168281593] [2021-12-06 17:37:43,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168281593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:43,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600201105] [2021-12-06 17:37:43,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:37:43,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:43,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:43,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:38:38,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-06 17:38:38,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:38:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 17:38:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:39,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:41,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600201105] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:38:41,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:38:41,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-06 17:38:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025035124] [2021-12-06 17:38:41,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:41,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 17:38:41,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:38:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 17:38:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1505, Invalid=7807, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 17:38:41,656 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,785 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2021-12-06 17:41:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 17:41:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 17:41:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,787 INFO L225 Difference]: With dead ends: 256 [2021-12-06 17:41:35,787 INFO L226 Difference]: Without dead ends: 252 [2021-12-06 17:41:35,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 174.3s TimeCoverageRelationStatistics Valid=4922, Invalid=15100, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 17:41:35,792 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 1268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1268 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 159 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1268 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:41:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-06 17:41:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-12-06 17:41:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2021-12-06 17:41:35,803 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 98 [2021-12-06 17:41:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,803 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2021-12-06 17:41:35,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2021-12-06 17:41:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 17:41:35,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,804 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-12-06 17:41:35,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:41:36,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:36,006 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1185534101, now seen corresponding path program 6 times [2021-12-06 17:41:36,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455959279] [2021-12-06 17:41:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:36,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:41:36,072 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:41:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:41:36,118 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:41:36,118 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 17:41:36,119 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 17:41:36,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:41:36,122 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1] [2021-12-06 17:41:36,125 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 17:41:36,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 05:41:36 BoogieIcfgContainer [2021-12-06 17:41:36,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 17:41:36,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 17:41:36,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 17:41:36,168 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 17:41:36,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:23" (3/4) ... [2021-12-06 17:41:36,169 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 17:41:36,223 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 17:41:36,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 17:41:36,224 INFO L158 Benchmark]: Toolchain (without parser) took 852787.15ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 48.3MB in the beginning and 41.2MB in the end (delta: 7.1MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,224 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:41:36,225 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.35ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 48.1MB in the beginning and 83.7MB in the end (delta: -35.6MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,225 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.59ms. Allocated memory is still 107.0MB. Free memory was 83.7MB in the beginning and 82.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,225 INFO L158 Benchmark]: Boogie Preprocessor took 13.57ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 81.2MB in the end (delta: 991.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,225 INFO L158 Benchmark]: RCFGBuilder took 167.40ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 72.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,226 INFO L158 Benchmark]: TraceAbstraction took 852362.20ms. Allocated memory is still 107.0MB. Free memory was 72.0MB in the beginning and 47.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,226 INFO L158 Benchmark]: Witness Printer took 56.26ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 41.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 17:41:36,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 160.35ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 48.1MB in the beginning and 83.7MB in the end (delta: -35.6MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.59ms. Allocated memory is still 107.0MB. Free memory was 83.7MB in the beginning and 82.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.57ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 81.2MB in the end (delta: 991.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 167.40ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 72.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 852362.20ms. Allocated memory is still 107.0MB. Free memory was 72.0MB in the beginning and 47.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. * Witness Printer took 56.26ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 41.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=1] [L17] COND TRUE x < 99 VAL [x=2, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=1] [L17] COND TRUE x < 99 VAL [x=4, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=1] [L17] COND TRUE x < 99 VAL [x=6, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=1] [L17] COND TRUE x < 99 VAL [x=8, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=1] [L17] COND TRUE x < 99 VAL [x=10, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=1] [L17] COND TRUE x < 99 VAL [x=12, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=1] [L17] COND TRUE x < 99 VAL [x=14, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=1] [L17] COND TRUE x < 99 VAL [x=16, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=1] [L17] COND TRUE x < 99 VAL [x=18, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=1] [L17] COND TRUE x < 99 VAL [x=20, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=1] [L17] COND TRUE x < 99 VAL [x=22, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=1] [L17] COND TRUE x < 99 VAL [x=24, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=1] [L17] COND TRUE x < 99 VAL [x=26, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=1] [L17] COND TRUE x < 99 VAL [x=28, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=1] [L17] COND TRUE x < 99 VAL [x=30, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=1] [L17] COND TRUE x < 99 VAL [x=32, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=1] [L17] COND TRUE x < 99 VAL [x=34, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=1] [L17] COND TRUE x < 99 VAL [x=36, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=1] [L17] COND TRUE x < 99 VAL [x=38, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=1] [L17] COND TRUE x < 99 VAL [x=40, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=1] [L17] COND TRUE x < 99 VAL [x=42, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=1] [L17] COND TRUE x < 99 VAL [x=44, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=1] [L17] COND TRUE x < 99 VAL [x=46, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=1] [L17] COND TRUE x < 99 VAL [x=48, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=1] [L17] COND TRUE x < 99 VAL [x=50, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=1] [L17] COND TRUE x < 99 VAL [x=52, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=1] [L17] COND TRUE x < 99 VAL [x=54, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=1] [L17] COND TRUE x < 99 VAL [x=56, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=1] [L17] COND TRUE x < 99 VAL [x=58, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=1] [L17] COND TRUE x < 99 VAL [x=60, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=1] [L17] COND TRUE x < 99 VAL [x=62, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=1] [L17] COND TRUE x < 99 VAL [x=64, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=1] [L17] COND TRUE x < 99 VAL [x=66, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=1] [L17] COND TRUE x < 99 VAL [x=68, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=1] [L17] COND TRUE x < 99 VAL [x=70, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=1] [L17] COND TRUE x < 99 VAL [x=72, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=1] [L17] COND TRUE x < 99 VAL [x=74, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=1] [L17] COND TRUE x < 99 VAL [x=76, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=1] [L17] COND TRUE x < 99 VAL [x=78, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=1] [L17] COND TRUE x < 99 VAL [x=80, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=1] [L17] COND TRUE x < 99 VAL [x=82, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=1] [L17] COND TRUE x < 99 VAL [x=84, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=1] [L17] COND TRUE x < 99 VAL [x=86, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=1] [L17] COND TRUE x < 99 VAL [x=88, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=1] [L17] COND TRUE x < 99 VAL [x=90, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=1] [L17] COND TRUE x < 99 VAL [x=92, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=1] [L17] COND TRUE x < 99 VAL [x=94, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=1] [L17] COND TRUE x < 99 VAL [x=96, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=1] [L17] COND TRUE x < 99 VAL [x=98, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=1] [L17] COND FALSE !(x < 99) VAL [x=100, y=1] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 852.3s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 783.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 377 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 377 mSDsluCounter, 712 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 617 mSDsCounter, 2792 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14179 IncrementalHoareTripleChecker+Invalid, 16971 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2792 mSolverCounterUnsat, 95 mSDtfsCounter, 14179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 655 SyntacticMatches, 9 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4022 ImplicationChecksByTransitivity, 781.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=252occurred in iteration=13, InterpolantAutomatonStates: 387, 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, 13 MinimizatonAttempts, 201 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 56.6s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 982 NumberOfCodeBlocks, 982 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 1249 ConstructedInterpolants, 0 QuantifiedInterpolants, 7583 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1107 ConjunctsInSsa, 380 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 818/16483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 17:41:36,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4ac2d-4b42-48a0-8ef7-060a2133e7b8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE