./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX --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 ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:40:09,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:40:09,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:40:09,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:40:09,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:40:09,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:40:09,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:40:09,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:40:09,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:40:09,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:40:09,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:40:09,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:40:09,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:40:09,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:40:09,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:40:09,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:40:09,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:40:09,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:40:09,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:40:09,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:40:09,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:40:09,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:40:09,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:40:09,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:40:09,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:40:09,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:40:09,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:40:09,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:40:09,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:40:09,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:40:09,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:40:09,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:40:09,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:40:09,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:40:09,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:40:09,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:40:09,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:40:09,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:40:09,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:40:09,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:40:09,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:40:09,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:40:09,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:40:09,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:40:09,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:40:09,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:40:09,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:40:09,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:40:09,665 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:40:09,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:40:09,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:40:09,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:40:09,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:40:09,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:40:09,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:40:09,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:40:09,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:40:09,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:40:09,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:40:09,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:40:09,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:40:09,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:40:09,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:40:09,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:40:09,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:40:09,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:40:09,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:40:09,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:40:09,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:40:09,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:40:09,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:40:09,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:40:09,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:40:09,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:40:09,673 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_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 [2021-11-09 10:40:09,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:40:09,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:40:09,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:40:09,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:40:09,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:40:09,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2021-11-09 10:40:10,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/data/c94e391bf/1d25c96bca14427fb6d1ba4546656aab/FLAG23bfa3f3c [2021-11-09 10:40:10,689 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:40:10,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2021-11-09 10:40:10,698 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/data/c94e391bf/1d25c96bca14427fb6d1ba4546656aab/FLAG23bfa3f3c [2021-11-09 10:40:11,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/data/c94e391bf/1d25c96bca14427fb6d1ba4546656aab [2021-11-09 10:40:11,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:40:11,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:40:11,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:40:11,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:40:11,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:40:11,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7f5f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11, skipping insertion in model container [2021-11-09 10:40:11,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:40:11,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:40:11,318 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2021-11-09 10:40:11,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:40:11,366 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:40:11,389 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2021-11-09 10:40:11,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:40:11,435 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:40:11,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11 WrapperNode [2021-11-09 10:40:11,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:40:11,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:40:11,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:40:11,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:40:11,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:40:11,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:40:11,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:40:11,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:40:11,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:40:11,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:40:11,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:40:11,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:40:11,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (1/1) ... [2021-11-09 10:40:11,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:40:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:11,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:40:11,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:40:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:40:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:40:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:40:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:40:11,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:40:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:40:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:40:11,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:40:11,951 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 10:40:11,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:40:11 BoogieIcfgContainer [2021-11-09 10:40:11,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:40:11,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:40:11,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:40:11,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:40:11,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:40:11" (1/3) ... [2021-11-09 10:40:11,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d1519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:40:11, skipping insertion in model container [2021-11-09 10:40:11,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:11" (2/3) ... [2021-11-09 10:40:11,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d1519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:40:11, skipping insertion in model container [2021-11-09 10:40:11,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:40:11" (3/3) ... [2021-11-09 10:40:11,964 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2021-11-09 10:40:11,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:40:11,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:40:12,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:40:12,072 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 [2021-11-09 10:40:12,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:40:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:40:12,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:12,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:12,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2021-11-09 10:40:12,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:12,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070000535] [2021-11-09 10:40:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:12,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:12,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070000535] [2021-11-09 10:40:12,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070000535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:12,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:12,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:40:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212705858] [2021-11-09 10:40:12,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:40:12,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:40:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:40:12,425 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-11-09 10:40:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:12,564 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-11-09 10:40:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:40:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 10:40:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:12,573 INFO L225 Difference]: With dead ends: 51 [2021-11-09 10:40:12,574 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 10:40:12,576 INFO L786 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 [2021-11-09 10:40:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 10:40:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 10:40:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2021-11-09 10:40:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-09 10:40:12,610 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-11-09 10:40:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:12,611 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-09 10:40:12,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-11-09 10:40:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-09 10:40:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:40:12,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:12,613 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:12,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:40:12,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2021-11-09 10:40:12,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:12,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708765579] [2021-11-09 10:40:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:12,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:40:12,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:12,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708765579] [2021-11-09 10:40:12,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708765579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:12,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144719628] [2021-11-09 10:40:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:12,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:12,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:12,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:12,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:40:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:40:12,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144719628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:12,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:12,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:40:12,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440214762] [2021-11-09 10:40:12,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:40:12,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:12,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:40:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:12,896 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:40:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:12,977 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-09 10:40:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 23 [2021-11-09 10:40:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:12,979 INFO L225 Difference]: With dead ends: 54 [2021-11-09 10:40:12,979 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 10:40:12,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 10:40:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-09 10:40:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-09 10:40:12,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2021-11-09 10:40:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:12,989 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-09 10:40:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:40:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-09 10:40:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:40:12,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:12,991 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:13,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:13,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:13,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2021-11-09 10:40:13,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:13,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904235811] [2021-11-09 10:40:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:13,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:40:13,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:13,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904235811] [2021-11-09 10:40:13,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904235811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:13,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114838532] [2021-11-09 10:40:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:13,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:13,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:13,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:40:13,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:40:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:40:13,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114838532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:13,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:13,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 10:40:13,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518086065] [2021-11-09 10:40:13,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:40:13,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:40:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:40:13,500 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:13,651 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-11-09 10:40:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:40:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 10:40:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:13,654 INFO L225 Difference]: With dead ends: 65 [2021-11-09 10:40:13,654 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 10:40:13,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:40:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 10:40:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-09 10:40:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 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) [2021-11-09 10:40:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-09 10:40:13,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2021-11-09 10:40:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:13,679 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-09 10:40:13,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-09 10:40:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:40:13,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:13,682 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:13,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:13,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:13,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2021-11-09 10:40:13,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:13,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682251560] [2021-11-09 10:40:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:13,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 10:40:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:14,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682251560] [2021-11-09 10:40:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682251560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:14,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943129243] [2021-11-09 10:40:14,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:14,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:14,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:14,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:14,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:40:14,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:40:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:40:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 10:40:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943129243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:14,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 10:40:14,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910119997] [2021-11-09 10:40:14,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:40:14,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:40:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:40:14,323 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-11-09 10:40:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:14,427 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-11-09 10:40:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:40:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 35 [2021-11-09 10:40:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:14,429 INFO L225 Difference]: With dead ends: 76 [2021-11-09 10:40:14,430 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 10:40:14,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:40:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 10:40:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-09 10:40:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-09 10:40:14,451 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2021-11-09 10:40:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:14,452 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-09 10:40:14,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-11-09 10:40:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-09 10:40:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 10:40:14,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:14,454 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:14,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:14,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:14,681 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2021-11-09 10:40:14,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:14,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767826728] [2021-11-09 10:40:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:14,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:40:14,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:14,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767826728] [2021-11-09 10:40:14,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767826728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:14,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261314561] [2021-11-09 10:40:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:14,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:40:15,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:15,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:40:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:40:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261314561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:15,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:15,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 10:40:15,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134188940] [2021-11-09 10:40:15,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:15,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:15,159 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:15,267 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-11-09 10:40:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:40:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 10:40:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:15,271 INFO L225 Difference]: With dead ends: 87 [2021-11-09 10:40:15,272 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 10:40:15,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 10:40:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-09 10:40:15,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) [2021-11-09 10:40:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-09 10:40:15,294 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2021-11-09 10:40:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:15,294 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-09 10:40:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-09 10:40:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:40:15,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:15,301 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:15,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:15,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:15,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2021-11-09 10:40:15,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:15,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994573403] [2021-11-09 10:40:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:15,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 10:40:15,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994573403] [2021-11-09 10:40:15,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994573403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434934517] [2021-11-09 10:40:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:15,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:15,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:15,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:40:21,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:40:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:40:21,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 10:40:22,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434934517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:22,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:22,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 10:40:22,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881029637] [2021-11-09 10:40:22,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:40:22,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:40:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:40:22,095 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-09 10:40:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:22,204 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-11-09 10:40:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:40:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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 47 [2021-11-09 10:40:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:22,209 INFO L225 Difference]: With dead ends: 98 [2021-11-09 10:40:22,209 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 10:40:22,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:40:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 10:40:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-09 10:40:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-11-09 10:40:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-09 10:40:22,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2021-11-09 10:40:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:22,224 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-09 10:40:22,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-09 10:40:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-09 10:40:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:40:22,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:22,233 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:22,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:22,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:22,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2021-11-09 10:40:22,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:22,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844206068] [2021-11-09 10:40:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:22,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-09 10:40:22,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:22,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844206068] [2021-11-09 10:40:22,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844206068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:22,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324815792] [2021-11-09 10:40:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:40:22,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:22,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:22,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:40:23,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 10:40:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:40:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-09 10:40:24,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324815792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:24,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:24,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 10:40:24,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068731107] [2021-11-09 10:40:24,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:40:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:40:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:40:24,069 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 10:40:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:24,213 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-11-09 10:40:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:40:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 10:40:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:24,216 INFO L225 Difference]: With dead ends: 109 [2021-11-09 10:40:24,216 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 10:40:24,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:40:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 10:40:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 10:40:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 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) [2021-11-09 10:40:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-09 10:40:24,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2021-11-09 10:40:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:24,240 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-09 10:40:24,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 10:40:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-09 10:40:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 10:40:24,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:24,242 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:24,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:24,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 10:40:24,462 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2021-11-09 10:40:24,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:24,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217751244] [2021-11-09 10:40:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:24,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-09 10:40:24,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:24,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217751244] [2021-11-09 10:40:24,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217751244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:24,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884582855] [2021-11-09 10:40:24,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:40:24,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:24,594 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:24,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:40:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:24,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:40:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-09 10:40:24,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884582855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:24,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:24,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 10:40:24,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726997369] [2021-11-09 10:40:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:40:24,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:40:24,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:40:24,975 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:25,109 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-11-09 10:40:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:40:25,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 10:40:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:25,111 INFO L225 Difference]: With dead ends: 120 [2021-11-09 10:40:25,111 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 10:40:25,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:40:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 10:40:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-09 10:40:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-11-09 10:40:25,120 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2021-11-09 10:40:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:25,120 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-11-09 10:40:25,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-11-09 10:40:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:40:25,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:25,122 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:25,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:25,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 10:40:25,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2021-11-09 10:40:25,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:25,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780296229] [2021-11-09 10:40:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:25,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-09 10:40:25,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:25,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780296229] [2021-11-09 10:40:25,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780296229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:25,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80989381] [2021-11-09 10:40:25,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:25,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:25,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:25,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:40:25,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:25,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:40:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-09 10:40:25,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80989381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:25,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:25,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:40:25,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063595786] [2021-11-09 10:40:25,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:40:25,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:40:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:40:25,930 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-09 10:40:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:26,067 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-11-09 10:40:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:40:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 65 [2021-11-09 10:40:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:26,069 INFO L225 Difference]: With dead ends: 131 [2021-11-09 10:40:26,069 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 10:40:26,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:40:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 10:40:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 10:40:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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) [2021-11-09 10:40:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-11-09 10:40:26,096 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2021-11-09 10:40:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:26,099 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-11-09 10:40:26,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-09 10:40:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-11-09 10:40:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:40:26,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:26,101 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:26,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:26,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:26,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2021-11-09 10:40:26,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:26,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856158333] [2021-11-09 10:40:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:26,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-09 10:40:26,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:26,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856158333] [2021-11-09 10:40:26,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856158333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:26,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389432082] [2021-11-09 10:40:26,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:26,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:26,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:26,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:40:32,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:40:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:40:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-09 10:40:32,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389432082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:32,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:32,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:40:32,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629303462] [2021-11-09 10:40:32,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:40:32,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:40:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:32,311 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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) [2021-11-09 10:40:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:32,473 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-11-09 10:40:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:32,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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 71 [2021-11-09 10:40:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:32,475 INFO L225 Difference]: With dead ends: 142 [2021-11-09 10:40:32,475 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 10:40:32,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 10:40:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-09 10:40:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-09 10:40:32,484 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2021-11-09 10:40:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-09 10:40:32,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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) [2021-11-09 10:40:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-09 10:40:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 10:40:32,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:32,486 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:32,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:32,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:40:32,701 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2021-11-09 10:40:32,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:32,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861157785] [2021-11-09 10:40:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:32,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-09 10:40:32,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:32,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861157785] [2021-11-09 10:40:32,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861157785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:32,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565593031] [2021-11-09 10:40:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:32,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:32,878 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:32,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:40:33,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:33,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:33,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:40:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-09 10:40:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565593031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:33,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:40:33,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972362736] [2021-11-09 10:40:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:40:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:40:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:40:33,383 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:33,581 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-11-09 10:40:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:40:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 10:40:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:33,584 INFO L225 Difference]: With dead ends: 153 [2021-11-09 10:40:33,584 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 10:40:33,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:40:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 10:40:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-09 10:40:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 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) [2021-11-09 10:40:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-09 10:40:33,598 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2021-11-09 10:40:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:33,599 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-09 10:40:33,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-09 10:40:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:40:33,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:33,608 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:33,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:33,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:40:33,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2021-11-09 10:40:33,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:33,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883411552] [2021-11-09 10:40:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:33,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 10:40:34,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:34,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883411552] [2021-11-09 10:40:34,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883411552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:34,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376116580] [2021-11-09 10:40:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:34,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:34,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:34,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede08d-9b31-4db9-bb92-7c965aaa8a6a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process