./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/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_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/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_23bcac59-c368-412a-9c0d-18577f97895a/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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:46:47,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:46:47,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:46:47,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:46:47,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:46:47,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:46:47,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:46:47,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:46:47,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:46:47,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:46:47,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:46:47,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:46:47,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:46:47,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:46:47,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:46:47,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:46:47,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:46:47,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:46:47,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:46:47,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:46:47,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:46:47,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:46:47,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:46:47,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:46:47,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:46:47,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:46:47,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:46:47,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:46:47,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:46:47,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:46:47,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:46:47,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:46:47,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:46:47,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:46:47,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:46:47,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:46:47,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:46:47,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:46:47,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:46:47,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:46:47,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:46:47,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:46:47,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:46:47,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:46:47,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:46:47,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:46:47,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:46:47,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:46:47,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:46:47,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:46:47,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:46:47,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:46:47,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:46:47,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:46:47,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:46:47,801 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_23bcac59-c368-412a-9c0d-18577f97895a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2021-12-07 01:46:47,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:46:48,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:46:48,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:46:48,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:46:48,006 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:46:48,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-12-07 01:46:48,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/data/8bc383a99/2ec931a40f034cbfac84cefff6777b84/FLAG33fa05967 [2021-12-07 01:46:48,411 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:46:48,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-12-07 01:46:48,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/data/8bc383a99/2ec931a40f034cbfac84cefff6777b84/FLAG33fa05967 [2021-12-07 01:46:48,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/data/8bc383a99/2ec931a40f034cbfac84cefff6777b84 [2021-12-07 01:46:48,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:46:48,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:46:48,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:46:48,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:46:48,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:46:48,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d940ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48, skipping insertion in model container [2021-12-07 01:46:48,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:46:48,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:46:48,561 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_23bcac59-c368-412a-9c0d-18577f97895a/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2021-12-07 01:46:48,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:46:48,578 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:46:48,588 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_23bcac59-c368-412a-9c0d-18577f97895a/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2021-12-07 01:46:48,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:46:48,605 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:46:48,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48 WrapperNode [2021-12-07 01:46:48,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:46:48,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:46:48,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:46:48,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:46:48,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,632 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-12-07 01:46:48,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:46:48,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:46:48,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:46:48,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:46:48,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:46:48,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:46:48,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:46:48,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:46:48,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (1/1) ... [2021-12-07 01:46:48,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:46:48,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:48,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:46:48,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:46:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:46:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:46:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:46:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:46:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:46:48,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:46:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:46:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:46:48,773 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:46:48,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:46:48,855 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:46:48,859 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:46:48,859 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:46:48,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:46:48 BoogieIcfgContainer [2021-12-07 01:46:48,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:46:48,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:46:48,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:46:48,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:46:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:46:48" (1/3) ... [2021-12-07 01:46:48,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a796f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:46:48, skipping insertion in model container [2021-12-07 01:46:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:46:48" (2/3) ... [2021-12-07 01:46:48,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a796f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:46:48, skipping insertion in model container [2021-12-07 01:46:48,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:46:48" (3/3) ... [2021-12-07 01:46:48,867 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2021-12-07 01:46:48,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:46:48,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:46:48,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:46:48,911 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:46:48,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:46:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 01:46:48,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:48,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:48,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-12-07 01:46:48,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:48,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431154498] [2021-12-07 01:46:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:48,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:46:49,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431154498] [2021-12-07 01:46:49,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431154498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:49,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:46:49,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:46:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251258718] [2021-12-07 01:46:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:49,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:49,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:49,097 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:49,128 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-07 01:46:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 01:46:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:49,136 INFO L225 Difference]: With dead ends: 36 [2021-12-07 01:46:49,136 INFO L226 Difference]: Without dead ends: 18 [2021-12-07 01:46:49,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:49,141 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:49,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:46:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-07 01:46:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-07 01:46:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-12-07 01:46:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-07 01:46:49,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-12-07 01:46:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:49,167 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-07 01:46:49,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-07 01:46:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:46:49,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:49,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:49,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:46:49,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-12-07 01:46:49,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:49,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196507618] [2021-12-07 01:46:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:49,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:46:49,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:49,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196507618] [2021-12-07 01:46:49,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196507618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890574301] [2021-12-07 01:46:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:49,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:49,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:49,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:46:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:46:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:46:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:46:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:46:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890574301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:46:49,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:46:49,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 01:46:49,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099192075] [2021-12-07 01:46:49,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:46:49,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:46:49,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:46:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:46:49,342 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:49,384 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-12-07 01:46:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:46:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 01:46:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:49,386 INFO L225 Difference]: With dead ends: 39 [2021-12-07 01:46:49,386 INFO L226 Difference]: Without dead ends: 28 [2021-12-07 01:46:49,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:46:49,388 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:49,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:46:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-07 01:46:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-07 01:46:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2021-12-07 01:46:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-07 01:46:49,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-12-07 01:46:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:49,396 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-07 01:46:49,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-07 01:46:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:46:49,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:49,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:49,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:46:49,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:49,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 2 times [2021-12-07 01:46:49,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028545495] [2021-12-07 01:46:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:49,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:46:49,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028545495] [2021-12-07 01:46:49,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028545495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238859620] [2021-12-07 01:46:49,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:46:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:49,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:49,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:46:49,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:46:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:46:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:46:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:46:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:46:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:46:49,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238859620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:46:49,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:46:49,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-07 01:46:49,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997539481] [2021-12-07 01:46:49,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:46:49,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:46:49,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:46:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:46:49,973 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:50,029 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2021-12-07 01:46:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:46:50,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-07 01:46:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:50,030 INFO L225 Difference]: With dead ends: 69 [2021-12-07 01:46:50,030 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 01:46:50,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:46:50,032 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:50,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:46:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 01:46:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 01:46:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-12-07 01:46:50,038 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 25 [2021-12-07 01:46:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:50,038 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-12-07 01:46:50,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-12-07 01:46:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:46:50,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:50,040 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:50,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:46:50,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:50,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 3 times [2021-12-07 01:46:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:50,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460393835] [2021-12-07 01:46:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:50,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 01:46:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460393835] [2021-12-07 01:46:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460393835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944021702] [2021-12-07 01:46:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:46:50,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:50,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:50,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:46:50,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:46:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:46:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:46:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:50,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:46:50,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-12-07 01:46:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:46:50,900 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-07 01:46:50,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 23 [2021-12-07 01:46:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-07 01:46:50,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:46:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944021702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:50,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:46:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2021-12-07 01:46:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708553654] [2021-12-07 01:46:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:50,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:46:50,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:46:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:46:50,915 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:50,935 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-12-07 01:46:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:46:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-07 01:46:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:50,936 INFO L225 Difference]: With dead ends: 59 [2021-12-07 01:46:50,936 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 01:46:50,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:46:50,937 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:50,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 37 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-07 01:46:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 01:46:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-12-07 01:46:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 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) [2021-12-07 01:46:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-07 01:46:50,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-12-07 01:46:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:50,945 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-07 01:46:50,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-07 01:46:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:46:50,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:50,946 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:50,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:46:51,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:51,149 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1048670371, now seen corresponding path program 1 times [2021-12-07 01:46:51,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:51,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027826905] [2021-12-07 01:46:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:51,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-07 01:46:51,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:51,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027826905] [2021-12-07 01:46:51,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027826905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:51,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348609241] [2021-12-07 01:46:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:51,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:51,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:51,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:46:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:46:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-07 01:46:51,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:46:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-07 01:46:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348609241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:46:51,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:46:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-07 01:46:51,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207289106] [2021-12-07 01:46:51,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:46:51,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:46:51,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:46:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:46:51,646 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:51,788 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2021-12-07 01:46:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:46:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 53 [2021-12-07 01:46:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:51,790 INFO L225 Difference]: With dead ends: 133 [2021-12-07 01:46:51,790 INFO L226 Difference]: Without dead ends: 102 [2021-12-07 01:46:51,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:46:51,792 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:51,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 36 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:46:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-07 01:46:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-07 01:46:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-12-07 01:46:51,810 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 53 [2021-12-07 01:46:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-12-07 01:46:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-12-07 01:46:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:46:51,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:51,815 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:51,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:46:52,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:52,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash -109773453, now seen corresponding path program 2 times [2021-12-07 01:46:52,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:52,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996404580] [2021-12-07 01:46:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:52,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-07 01:46:52,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996404580] [2021-12-07 01:46:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996404580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429687462] [2021-12-07 01:46:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:46:52,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:52,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:52,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:52,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:46:52,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:46:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:46:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:46:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-07 01:46:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:46:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-07 01:46:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429687462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:46:53,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:46:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-07 01:46:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231732712] [2021-12-07 01:46:53,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:46:53,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:46:53,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:46:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:46:53,127 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:53,389 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2021-12-07 01:46:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-07 01:46:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 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 101 [2021-12-07 01:46:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:53,391 INFO L225 Difference]: With dead ends: 253 [2021-12-07 01:46:53,391 INFO L226 Difference]: Without dead ends: 198 [2021-12-07 01:46:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:46:53,393 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 223 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:53,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 36 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:46:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-07 01:46:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-12-07 01:46:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2021-12-07 01:46:53,409 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 101 [2021-12-07 01:46:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:53,409 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2021-12-07 01:46:53,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2021-12-07 01:46:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-07 01:46:53,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:53,412 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:53,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:46:53,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:53,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash -645892333, now seen corresponding path program 3 times [2021-12-07 01:46:53,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035604319] [2021-12-07 01:46:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:53,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2021-12-07 01:46:54,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:54,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035604319] [2021-12-07 01:46:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035604319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:54,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580958756] [2021-12-07 01:46:54,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:46:54,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:54,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:54,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:46:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:46:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:46:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:46:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:54,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:46:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-12-07 01:46:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:46:55,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 01:46:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:46:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:46:55,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2021-12-07 01:46:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 174 proven. 95 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2021-12-07 01:46:55,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:46:55,867 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:46:55,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 510 treesize of output 474 [2021-12-07 01:46:55,881 INFO L354 Elim1Store]: treesize reduction 39, result has 9.3 percent of original size [2021-12-07 01:46:55,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1820 treesize of output 1528 [2021-12-07 01:46:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2021-12-07 01:46:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580958756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:46:59,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:46:59,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 12, 11] total 67 [2021-12-07 01:46:59,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497074665] [2021-12-07 01:46:59,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:46:59,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 01:46:59,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 01:46:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1498, Invalid=2924, Unknown=0, NotChecked=0, Total=4422 [2021-12-07 01:46:59,748 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 67 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:47:04,469 INFO L93 Difference]: Finished difference Result 320 states and 329 transitions. [2021-12-07 01:47:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-07 01:47:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 67 states have internal predecessors, (145), 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 197 [2021-12-07 01:47:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:47:04,471 INFO L225 Difference]: With dead ends: 320 [2021-12-07 01:47:04,471 INFO L226 Difference]: Without dead ends: 217 [2021-12-07 01:47:04,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 423 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12508 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13255, Invalid=31477, Unknown=0, NotChecked=0, Total=44732 [2021-12-07 01:47:04,483 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:47:04,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 121 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 265 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-12-07 01:47:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-07 01:47:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 208. [2021-12-07 01:47:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0144927536231885) internal successors, (210), 207 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2021-12-07 01:47:04,497 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 197 [2021-12-07 01:47:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:04,498 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2021-12-07 01:47:04,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 67 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2021-12-07 01:47:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-07 01:47:04,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:04,501 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:04,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:47:04,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 01:47:04,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -97913533, now seen corresponding path program 4 times [2021-12-07 01:47:04,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:04,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780882111] [2021-12-07 01:47:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:04,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2021-12-07 01:47:05,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780882111] [2021-12-07 01:47:05,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780882111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:47:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368319582] [2021-12-07 01:47:05,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:47:05,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:47:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:47:05,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:47:05,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:47:05,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:47:05,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:47:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:47:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:47:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2021-12-07 01:47:05,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:47:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2021-12-07 01:47:07,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368319582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:47:07,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:47:07,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-07 01:47:07,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567082111] [2021-12-07 01:47:07,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:47:07,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-07 01:47:07,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:47:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-07 01:47:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 01:47:07,179 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:47:08,169 INFO L93 Difference]: Finished difference Result 513 states and 613 transitions. [2021-12-07 01:47:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-07 01:47:08,169 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 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 207 [2021-12-07 01:47:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:47:08,171 INFO L225 Difference]: With dead ends: 513 [2021-12-07 01:47:08,172 INFO L226 Difference]: Without dead ends: 402 [2021-12-07 01:47:08,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 01:47:08,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 680 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:47:08,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 28 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:47:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-07 01:47:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-12-07 01:47:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.0074812967581048) internal successors, (404), 401 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 404 transitions. [2021-12-07 01:47:08,202 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 404 transitions. Word has length 207 [2021-12-07 01:47:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:08,203 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 404 transitions. [2021-12-07 01:47:08,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 404 transitions. [2021-12-07 01:47:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-07 01:47:08,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:08,209 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:08,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 01:47:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:47:08,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1887797439, now seen corresponding path program 5 times [2021-12-07 01:47:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222511490] [2021-12-07 01:47:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:08,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18440 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 9224 trivial. 0 not checked. [2021-12-07 01:47:10,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222511490] [2021-12-07 01:47:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222511490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:47:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394284517] [2021-12-07 01:47:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:47:10,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:47:10,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:47:10,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:47:10,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bcac59-c368-412a-9c0d-18577f97895a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process