./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-2-u.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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:22:21,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:22:21,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:22:21,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:22:21,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:22:21,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:22:21,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:22:21,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:22:21,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:22:21,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:22:21,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:22:21,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:22:21,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:22:21,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:22:21,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:22:21,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:22:21,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:22:21,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:22:21,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:22:21,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:22:21,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:22:21,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:22:21,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:22:21,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:22:21,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:22:21,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:22:21,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:22:21,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:22:21,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:22:21,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:22:21,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:22:21,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:22:21,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:22:21,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:22:21,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:22:21,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:22:21,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:22:21,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:22:21,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:22:21,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:22:21,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:22:21,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:22:21,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:22:21,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:22:21,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:22:21,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:22:21,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:22:21,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:22:21,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:22:21,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:22:21,788 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:22:21,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:22:21,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:22:21,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:22:21,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:22:21,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:22:21,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:22:21,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:22:21,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:22:21,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:22:21,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:22:21,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:22:21,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:22:21,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:22:21,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:22:21,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:22:21,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:22:21,796 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:22:21,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:22:21,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:22:21,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:22:21,797 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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2021-12-06 19:22:22,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:22:22,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:22:22,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:22:22,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:22:22,039 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:22:22,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-multidimensional/max-2-u.c [2021-12-06 19:22:22,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/data/e9c1f871d/6b54d201214349fb8a6ddb8bebf1fda9/FLAGb4eaa806f [2021-12-06 19:22:22,457 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:22:22,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/sv-benchmarks/c/array-multidimensional/max-2-u.c [2021-12-06 19:22:22,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/data/e9c1f871d/6b54d201214349fb8a6ddb8bebf1fda9/FLAGb4eaa806f [2021-12-06 19:22:22,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/data/e9c1f871d/6b54d201214349fb8a6ddb8bebf1fda9 [2021-12-06 19:22:22,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:22:22,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:22:22,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:22:22,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:22:22,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:22:22,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49282ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22, skipping insertion in model container [2021-12-06 19:22:22,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:22:22,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:22:22,604 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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2021-12-06 19:22:22,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:22:22,622 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:22:22,630 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_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2021-12-06 19:22:22,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:22:22,645 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:22:22,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22 WrapperNode [2021-12-06 19:22:22,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:22:22,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:22:22,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:22:22,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:22:22,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,678 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-06 19:22:22,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:22:22,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:22:22,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:22:22,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:22:22,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:22:22,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:22:22,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:22:22,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:22:22,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (1/1) ... [2021-12-06 19:22:22,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:22:22,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:22,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:22:22,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:22:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:22:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:22:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:22:22,828 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:22:22,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:22:22,934 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:22:22,951 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:22:22,951 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 19:22:22,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:22:22 BoogieIcfgContainer [2021-12-06 19:22:22,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:22:22,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:22:22,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:22:22,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:22:22,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:22:22" (1/3) ... [2021-12-06 19:22:22,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708892e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:22:22, skipping insertion in model container [2021-12-06 19:22:22,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:22" (2/3) ... [2021-12-06 19:22:22,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708892e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:22:22, skipping insertion in model container [2021-12-06 19:22:22,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:22:22" (3/3) ... [2021-12-06 19:22:22,968 INFO L111 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2021-12-06 19:22:22,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:22:22,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:22:23,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:22:23,019 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 19:22:23,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:22:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:22:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:22:23,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:23,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:23,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2021-12-06 19:22:23,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:23,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349784431] [2021-12-06 19:22:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:23,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:23,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:23,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628570252] [2021-12-06 19:22:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:23,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:23,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:23,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:22:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:22:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:23,269 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 19:22:23,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:23,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349784431] [2021-12-06 19:22:23,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:23,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628570252] [2021-12-06 19:22:23,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628570252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:23,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:22:23,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:22:23,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511325203] [2021-12-06 19:22:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:22:23,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:22:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:22:23,301 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 19:22:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:23,338 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-12-06 19:22:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:22:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) Word has length 10 [2021-12-06 19:22:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:23,345 INFO L225 Difference]: With dead ends: 47 [2021-12-06 19:22:23,346 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 19:22:23,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 19:22:23,350 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:23,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 19:22:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-06 19:22:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 19:22:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-06 19:22:23,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2021-12-06 19:22:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:23,374 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-06 19:22:23,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 19:22:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-12-06 19:22:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:22:23,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:23,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:23,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:22:23,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 19:22:23,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2021-12-06 19:22:23,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348703173] [2021-12-06 19:22:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:23,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:23,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:23,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617945622] [2021-12-06 19:22:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:23,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:23,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:23,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:22:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:22:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:22:23,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:23,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348703173] [2021-12-06 19:22:23,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:23,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617945622] [2021-12-06 19:22:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617945622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:23,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:22:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:22:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257403851] [2021-12-06 19:22:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:22:23,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:22:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:22:23,741 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 19:22:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:23,776 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-12-06 19:22:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:22:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 13 [2021-12-06 19:22:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:23,778 INFO L225 Difference]: With dead ends: 49 [2021-12-06 19:22:23,778 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 19:22:23,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:22:23,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:23,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 19:22:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-12-06 19:22:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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 19:22:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-06 19:22:23,784 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-12-06 19:22:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:23,785 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-06 19:22:23,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 19:22:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-06 19:22:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 19:22:23,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:23,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:23,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:22:23,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:23,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2021-12-06 19:22:23,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:23,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994606141] [2021-12-06 19:22:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:23,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:24,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542839801] [2021-12-06 19:22:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:24,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:24,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:24,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:22:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:22:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:22:24,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:22:24,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994606141] [2021-12-06 19:22:24,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542839801] [2021-12-06 19:22:24,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542839801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:24,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:22:24,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:22:24,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024125927] [2021-12-06 19:22:24,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:24,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:22:24,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:22:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:22:24,144 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 19:22:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:24,221 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2021-12-06 19:22:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:22:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 19:22:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:24,222 INFO L225 Difference]: With dead ends: 73 [2021-12-06 19:22:24,222 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 19:22:24,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:22:24,223 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:24,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:22:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 19:22:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-12-06 19:22:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 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 19:22:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-12-06 19:22:24,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2021-12-06 19:22:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:24,230 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-12-06 19:22:24,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 19:22:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-12-06 19:22:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 19:22:24,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:24,231 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:24,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:22:24,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:24,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1437205722, now seen corresponding path program 2 times [2021-12-06 19:22:24,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838294600] [2021-12-06 19:22:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:24,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:24,465 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:24,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534616534] [2021-12-06 19:22:24,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:22:24,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:24,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:24,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:24,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:22:24,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:22:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:22:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 19:22:24,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:24,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838294600] [2021-12-06 19:22:24,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534616534] [2021-12-06 19:22:24,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534616534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:24,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:22:24,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:22:24,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495252161] [2021-12-06 19:22:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:24,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:22:24,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:22:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:22:24,652 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 19:22:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:24,683 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2021-12-06 19:22:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:22:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 17 [2021-12-06 19:22:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:24,685 INFO L225 Difference]: With dead ends: 100 [2021-12-06 19:22:24,685 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 19:22:24,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:22:24,686 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:24,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 19:22:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2021-12-06 19:22:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 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 19:22:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-12-06 19:22:24,694 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2021-12-06 19:22:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:24,694 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-12-06 19:22:24,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 19:22:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-12-06 19:22:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 19:22:24,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:24,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:24,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:22:24,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:24,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 1 times [2021-12-06 19:22:24,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551626626] [2021-12-06 19:22:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:24,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:24,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:24,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916448333] [2021-12-06 19:22:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:24,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:24,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:24,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:22:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:24,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:22:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 19:22:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 19:22:25,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551626626] [2021-12-06 19:22:25,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916448333] [2021-12-06 19:22:25,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916448333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:25,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:22:25,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 19:22:25,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803965719] [2021-12-06 19:22:25,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:22:25,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:22:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:22:25,113 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:22:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:25,276 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2021-12-06 19:22:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:22:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 19:22:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:25,278 INFO L225 Difference]: With dead ends: 148 [2021-12-06 19:22:25,278 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 19:22:25,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:22:25,280 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 370 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:25,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 55 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:22:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 19:22:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-12-06 19:22:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 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 19:22:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2021-12-06 19:22:25,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2021-12-06 19:22:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:25,295 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2021-12-06 19:22:25,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:22:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2021-12-06 19:22:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 19:22:25,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:25,297 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:25,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:22:25,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:25,498 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 2 times [2021-12-06 19:22:25,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:25,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082550025] [2021-12-06 19:22:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:25,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:25,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552313927] [2021-12-06 19:22:25,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:22:25,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:25,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:25,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:22:25,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:22:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:22:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-06 19:22:25,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-06 19:22:25,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082550025] [2021-12-06 19:22:25,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552313927] [2021-12-06 19:22:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552313927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:25,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:22:25,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 19:22:25,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767147282] [2021-12-06 19:22:25,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:25,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:22:25,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:22:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:22:25,963 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 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 19:22:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:26,309 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2021-12-06 19:22:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:22:26,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 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 56 [2021-12-06 19:22:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:26,311 INFO L225 Difference]: With dead ends: 298 [2021-12-06 19:22:26,311 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 19:22:26,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:22:26,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 637 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:26,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 123 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:22:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 19:22:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2021-12-06 19:22:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 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 19:22:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2021-12-06 19:22:26,328 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 56 [2021-12-06 19:22:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:26,328 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2021-12-06 19:22:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 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 19:22:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2021-12-06 19:22:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 19:22:26,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:26,330 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:26,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:22:26,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 19:22:26,531 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash 270851446, now seen corresponding path program 3 times [2021-12-06 19:22:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:26,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51616988] [2021-12-06 19:22:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:26,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:26,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:26,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180594454] [2021-12-06 19:22:26,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:22:26,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:26,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:26,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:26,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:22:26,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 19:22:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:22:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-12-06 19:22:26,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-12-06 19:22:27,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51616988] [2021-12-06 19:22:27,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180594454] [2021-12-06 19:22:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180594454] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:27,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:22:27,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:22:27,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096946066] [2021-12-06 19:22:27,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:27,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:22:27,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:22:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:22:27,016 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 19:22:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:27,117 INFO L93 Difference]: Finished difference Result 766 states and 981 transitions. [2021-12-06 19:22:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:22:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 104 [2021-12-06 19:22:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:27,121 INFO L225 Difference]: With dead ends: 766 [2021-12-06 19:22:27,121 INFO L226 Difference]: Without dead ends: 694 [2021-12-06 19:22:27,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:22:27,123 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:27,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 33 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:22:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-06 19:22:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 378. [2021-12-06 19:22:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.312997347480106) internal successors, (495), 377 states have internal predecessors, (495), 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 19:22:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 495 transitions. [2021-12-06 19:22:27,149 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 495 transitions. Word has length 104 [2021-12-06 19:22:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:27,149 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 495 transitions. [2021-12-06 19:22:27,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 19:22:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 495 transitions. [2021-12-06 19:22:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-06 19:22:27,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:27,154 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:27,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:22:27,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 19:22:27,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1665112998, now seen corresponding path program 4 times [2021-12-06 19:22:27,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:27,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305463460] [2021-12-06 19:22:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:27,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:27,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:27,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005776743] [2021-12-06 19:22:27,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:22:27,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:27,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:27,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:22:27,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:22:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 19:22:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2021-12-06 19:22:28,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2021-12-06 19:22:29,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305463460] [2021-12-06 19:22:29,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:22:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005776743] [2021-12-06 19:22:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005776743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:29,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:22:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-12-06 19:22:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555374634] [2021-12-06 19:22:29,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:29,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 19:22:29,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 19:22:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 19:22:29,200 INFO L87 Difference]: Start difference. First operand 378 states and 495 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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 19:22:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:31,790 INFO L93 Difference]: Finished difference Result 1965 states and 2419 transitions. [2021-12-06 19:22:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 19:22:31,790 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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 311 [2021-12-06 19:22:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:31,799 INFO L225 Difference]: With dead ends: 1965 [2021-12-06 19:22:31,799 INFO L226 Difference]: Without dead ends: 1893 [2021-12-06 19:22:31,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2021-12-06 19:22:31,806 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 842 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:31,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 992 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 19:22:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-12-06 19:22:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 792. [2021-12-06 19:22:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 791 states have internal predecessors, (1047), 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 19:22:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1047 transitions. [2021-12-06 19:22:31,845 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1047 transitions. Word has length 311 [2021-12-06 19:22:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1047 transitions. [2021-12-06 19:22:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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 19:22:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1047 transitions. [2021-12-06 19:22:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2021-12-06 19:22:31,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:31,864 INFO L514 BasicCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:31,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:22:32,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:32,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1543634522, now seen corresponding path program 5 times [2021-12-06 19:22:32,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768960438] [2021-12-06 19:22:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:32,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:32,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:22:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870849263] [2021-12-06 19:22:32,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:22:32,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:32,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:32,165 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:32,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:37:04,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 184 check-sat command(s) [2021-12-06 19:37:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:37:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 34471 proven. 715 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2021-12-06 19:37:06,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 31477 proven. 3709 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2021-12-06 19:37:07,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768960438] [2021-12-06 19:37:07,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870849263] [2021-12-06 19:37:07,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870849263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:07,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:07,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 19:37:07,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864474832] [2021-12-06 19:37:07,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:37:07,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:37:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:37:07,206 INFO L87 Difference]: Start difference. First operand 792 states and 1047 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 19:37:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:08,658 INFO L93 Difference]: Finished difference Result 2488 states and 3505 transitions. [2021-12-06 19:37:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 19:37:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 725 [2021-12-06 19:37:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:08,665 INFO L225 Difference]: With dead ends: 2488 [2021-12-06 19:37:08,665 INFO L226 Difference]: Without dead ends: 1699 [2021-12-06 19:37:08,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 19:37:08,669 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1117 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:08,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 210 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:37:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-12-06 19:37:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1608. [2021-12-06 19:37:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 1.3235843186060983) internal successors, (2127), 1607 states have internal predecessors, (2127), 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 19:37:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2127 transitions. [2021-12-06 19:37:08,733 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2127 transitions. Word has length 725 [2021-12-06 19:37:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:08,733 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 2127 transitions. [2021-12-06 19:37:08,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 19:37:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2127 transitions. [2021-12-06 19:37:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2021-12-06 19:37:08,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:08,745 INFO L514 BasicCegarLoop]: trace histogram [460, 460, 460, 46, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:08,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:37:08,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:37:08,945 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash 467146662, now seen corresponding path program 6 times [2021-12-06 19:37:08,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178344331] [2021-12-06 19:37:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:08,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:09,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756665230] [2021-12-06 19:37:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:37:09,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:09,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:09,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:37:09,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 19:37:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:37:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2021-12-06 19:37:10,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2021-12-06 19:37:11,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178344331] [2021-12-06 19:37:11,173 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756665230] [2021-12-06 19:37:11,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756665230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:11,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:11,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 19:37:11,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864482215] [2021-12-06 19:37:11,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:11,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:37:11,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:37:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:11,176 INFO L87 Difference]: Start difference. First operand 1608 states and 2127 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 19:37:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:11,285 INFO L93 Difference]: Finished difference Result 3311 states and 4353 transitions. [2021-12-06 19:37:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:37:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 1469 [2021-12-06 19:37:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:11,292 INFO L225 Difference]: With dead ends: 3311 [2021-12-06 19:37:11,292 INFO L226 Difference]: Without dead ends: 1755 [2021-12-06 19:37:11,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2932 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:11,294 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:11,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-12-06 19:37:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1755. [2021-12-06 19:37:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1754 states have internal predecessors, (2277), 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 19:37:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2277 transitions. [2021-12-06 19:37:11,372 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2277 transitions. Word has length 1469 [2021-12-06 19:37:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 2277 transitions. [2021-12-06 19:37:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 19:37:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2277 transitions. [2021-12-06 19:37:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2021-12-06 19:37:11,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:11,391 INFO L514 BasicCegarLoop]: trace histogram [460, 460, 460, 184, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:11,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:37:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:11,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -317084805, now seen corresponding path program 7 times [2021-12-06 19:37:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222570885] [2021-12-06 19:37:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:11,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:11,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:11,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702217496] [2021-12-06 19:37:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:37:11,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:11,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:11,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:11,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:37:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 5490 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 19:37:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2021-12-06 19:37:13,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2021-12-06 19:37:17,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222570885] [2021-12-06 19:37:17,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702217496] [2021-12-06 19:37:17,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702217496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:17,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-12-06 19:37:17,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978835652] [2021-12-06 19:37:17,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:17,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 19:37:17,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:17,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 19:37:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 19:37:17,732 INFO L87 Difference]: Start difference. First operand 1755 states and 2277 transitions. Second operand has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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 19:37:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:26,704 INFO L93 Difference]: Finished difference Result 5423 states and 7621 transitions. [2021-12-06 19:37:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 19:37:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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 1616 [2021-12-06 19:37:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:26,717 INFO L225 Difference]: With dead ends: 5423 [2021-12-06 19:37:26,717 INFO L226 Difference]: Without dead ends: 3718 [2021-12-06 19:37:26,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3277 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 19:37:26,725 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2573 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2573 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:26,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2573 Valid, 427 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 19:37:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-12-06 19:37:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3531. [2021-12-06 19:37:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 1.2977337110481586) internal successors, (4581), 3530 states have internal predecessors, (4581), 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 19:37:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4581 transitions. [2021-12-06 19:37:26,906 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4581 transitions. Word has length 1616 [2021-12-06 19:37:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 4581 transitions. [2021-12-06 19:37:26,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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 19:37:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4581 transitions. [2021-12-06 19:37:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3249 [2021-12-06 19:37:26,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:26,973 INFO L514 BasicCegarLoop]: trace histogram [940, 940, 940, 376, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:27,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:37:27,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:27,174 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:27,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1104229509, now seen corresponding path program 8 times [2021-12-06 19:37:27,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:27,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272748886] [2021-12-06 19:37:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:27,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:27,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:27,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174201641] [2021-12-06 19:37:27,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:27,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:27,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:27,312 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:27,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80062e7d-0a14-4310-9d1a-08d6a9bc7f69/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:37:28,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:28,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 11058 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 19:37:28,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2021-12-06 19:37:32,714 INFO L328 TraceCheckSpWp]: Computing backward predicates...