./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:37:58,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:37:58,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:37:58,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:37:58,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:37:58,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:37:58,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:37:58,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:37:58,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:37:58,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:37:58,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:37:58,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:37:58,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:37:58,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:37:58,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:37:58,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:37:58,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:37:58,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:37:58,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:37:58,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:37:58,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:37:58,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:37:58,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:37:58,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:37:58,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:37:58,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:37:58,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:37:58,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:37:58,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:37:58,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:37:58,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:37:58,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:37:58,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:37:58,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:37:58,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:37:58,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:37:58,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:37:58,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:37:58,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:37:58,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:37:58,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:37:58,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:37:58,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:37:58,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:37:58,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:37:58,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:37:58,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:37:58,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:37:58,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:37:58,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:37:58,721 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:37:58,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:37:58,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:37:58,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:37:58,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:37:58,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:37:58,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:37:58,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:37:58,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:37:58,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:37:58,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:37:58,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:37:58,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:37:58,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:37:58,724 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_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2021-12-07 00:37:58,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:37:58,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:37:58,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:37:58,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:37:58,919 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:37:58,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-12-07 00:37:58,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/data/31acc1161/3d84bc2e3b6a4ab2b0f17be8a1d13261/FLAG089c0667a [2021-12-07 00:37:59,334 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:37:59,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-12-07 00:37:59,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/data/31acc1161/3d84bc2e3b6a4ab2b0f17be8a1d13261/FLAG089c0667a [2021-12-07 00:37:59,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/data/31acc1161/3d84bc2e3b6a4ab2b0f17be8a1d13261 [2021-12-07 00:37:59,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:37:59,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:37:59,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:37:59,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:37:59,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:37:59,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cba56ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59, skipping insertion in model container [2021-12-07 00:37:59,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:37:59,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:37:59,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2021-12-07 00:37:59,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:37:59,497 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:37:59,506 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2021-12-07 00:37:59,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:37:59,523 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:37:59,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59 WrapperNode [2021-12-07 00:37:59,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:37:59,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:37:59,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:37:59,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:37:59,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,557 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-07 00:37:59,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:37:59,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:37:59,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:37:59,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:37:59,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:37:59,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:37:59,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:37:59,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:37:59,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (1/1) ... [2021-12-07 00:37:59,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:37:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:59,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:37:59,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:37:59,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:37:59,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:37:59,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:37:59,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:37:59,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:37:59,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:37:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:37:59,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:37:59,695 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:37:59,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:37:59,828 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:37:59,833 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:37:59,833 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:37:59,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:37:59 BoogieIcfgContainer [2021-12-07 00:37:59,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:37:59,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:37:59,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:37:59,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:37:59,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:37:59" (1/3) ... [2021-12-07 00:37:59,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226b57f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:37:59, skipping insertion in model container [2021-12-07 00:37:59,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:37:59" (2/3) ... [2021-12-07 00:37:59,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226b57f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:37:59, skipping insertion in model container [2021-12-07 00:37:59,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:37:59" (3/3) ... [2021-12-07 00:37:59,841 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2021-12-07 00:37:59,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:37:59,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:37:59,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:37:59,884 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:37:59,884 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:37:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:37:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:37:59,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:59,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:37:59,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:37:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2021-12-07 00:37:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:37:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524782907] [2021-12-07 00:37:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:59,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:37:59,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:37:59,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947949932] [2021-12-07 00:37:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:59,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:59,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:59,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:37:59,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:38:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:38:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:38:00,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:00,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524782907] [2021-12-07 00:38:00,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947949932] [2021-12-07 00:38:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947949932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:00,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:38:00,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118638301] [2021-12-07 00:38:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:38:00,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:38:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:38:00,117 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:38:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:00,132 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2021-12-07 00:38:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:38:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-07 00:38:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:00,140 INFO L225 Difference]: With dead ends: 61 [2021-12-07 00:38:00,140 INFO L226 Difference]: Without dead ends: 28 [2021-12-07 00:38:00,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:38:00,145 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:00,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-07 00:38:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-07 00:38:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:38:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-12-07 00:38:00,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2021-12-07 00:38:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-12-07 00:38:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:38:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-12-07 00:38:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:38:00,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:00,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:00,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:38:00,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-07 00:38:00,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2021-12-07 00:38:00,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851284624] [2021-12-07 00:38:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:00,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:00,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946417602] [2021-12-07 00:38:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:00,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:00,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:38:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:38:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:00,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:00,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851284624] [2021-12-07 00:38:00,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946417602] [2021-12-07 00:38:00,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946417602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:00,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:00,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:38:00,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929581717] [2021-12-07 00:38:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:00,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:38:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:38:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:38:00,503 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:38:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:00,519 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-07 00:38:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:38:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-07 00:38:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:00,521 INFO L225 Difference]: With dead ends: 37 [2021-12-07 00:38:00,521 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:38:00,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:38:00,522 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:00,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:38:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-07 00:38:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:38:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-12-07 00:38:00,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2021-12-07 00:38:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:00,530 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-12-07 00:38:00,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:38:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-12-07 00:38:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:38:00,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:00,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:00,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:38:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:00,733 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2021-12-07 00:38:00,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528895866] [2021-12-07 00:38:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:00,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:00,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:00,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379452361] [2021-12-07 00:38:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:00,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:00,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:00,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:00,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:38:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:38:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:00,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:00,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:00,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528895866] [2021-12-07 00:38:00,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379452361] [2021-12-07 00:38:00,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379452361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:00,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:00,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:38:00,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172966640] [2021-12-07 00:38:00,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:00,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:38:00,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:38:00,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:38:00,959 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:38:03,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:38:05,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:38:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:05,267 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-12-07 00:38:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:38:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-07 00:38:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:05,269 INFO L225 Difference]: With dead ends: 49 [2021-12-07 00:38:05,269 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 00:38:05,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:38:05,270 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:05,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 110 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-07 00:38:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 00:38:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-07 00:38:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:38:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-12-07 00:38:05,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2021-12-07 00:38:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:05,279 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-12-07 00:38:05,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:38:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-12-07 00:38:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:38:05,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:05,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:05,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:38:05,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:05,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2021-12-07 00:38:05,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:05,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641831625] [2021-12-07 00:38:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:05,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:05,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:05,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278925657] [2021-12-07 00:38:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:05,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:05,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:05,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:38:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:38:05,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:05,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:05,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641831625] [2021-12-07 00:38:05,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278925657] [2021-12-07 00:38:05,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278925657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:05,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:05,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-07 00:38:05,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104013274] [2021-12-07 00:38:05,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:05,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:38:05,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:38:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:38:05,775 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:38:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:05,859 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-12-07 00:38:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:38:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-12-07 00:38:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:05,860 INFO L225 Difference]: With dead ends: 53 [2021-12-07 00:38:05,861 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 00:38:05,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:38:05,862 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:05,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 161 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:38:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 00:38:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2021-12-07 00:38:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:38:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-07 00:38:05,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2021-12-07 00:38:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-07 00:38:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:38:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-07 00:38:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 00:38:05,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:05,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:05,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:38:06,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:06,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:06,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2021-12-07 00:38:06,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:06,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752254784] [2021-12-07 00:38:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:06,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:06,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:06,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990904577] [2021-12-07 00:38:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:06,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:06,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:06,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:38:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:38:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:06,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:06,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752254784] [2021-12-07 00:38:06,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990904577] [2021-12-07 00:38:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990904577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:06,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:06,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:38:06,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770524685] [2021-12-07 00:38:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:06,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:38:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:38:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:38:06,295 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:38:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:06,317 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-07 00:38:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:38:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-07 00:38:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:06,318 INFO L225 Difference]: With dead ends: 61 [2021-12-07 00:38:06,318 INFO L226 Difference]: Without dead ends: 40 [2021-12-07 00:38:06,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:38:06,319 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:06,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-07 00:38:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-07 00:38:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:38:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-12-07 00:38:06,327 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2021-12-07 00:38:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-12-07 00:38:06,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:38:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-12-07 00:38:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:38:06,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:06,329 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:06,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:38:06,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:06,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2021-12-07 00:38:06,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070587831] [2021-12-07 00:38:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:06,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:06,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:06,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530849445] [2021-12-07 00:38:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:06,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:06,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:06,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:38:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:06,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:38:06,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:06,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:38:06,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070587831] [2021-12-07 00:38:06,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530849445] [2021-12-07 00:38:06,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530849445] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:38:06,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:38:06,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-12-07 00:38:06,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721018354] [2021-12-07 00:38:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:06,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:38:06,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:38:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:38:06,749 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:38:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:06,776 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-12-07 00:38:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:38:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-12-07 00:38:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:06,778 INFO L225 Difference]: With dead ends: 70 [2021-12-07 00:38:06,778 INFO L226 Difference]: Without dead ends: 49 [2021-12-07 00:38:06,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:38:06,779 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:06,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-07 00:38:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-12-07 00:38:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:38:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-07 00:38:06,787 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2021-12-07 00:38:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:06,787 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-07 00:38:06,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:38:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-07 00:38:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:38:06,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:06,789 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:06,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:38:06,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:06,991 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2021-12-07 00:38:06,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:06,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531426351] [2021-12-07 00:38:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:06,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:07,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954108992] [2021-12-07 00:38:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:07,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:07,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:07,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:38:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:38:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:07,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:38:07,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531426351] [2021-12-07 00:38:07,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954108992] [2021-12-07 00:38:07,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954108992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:07,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:07,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-07 00:38:07,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538871094] [2021-12-07 00:38:07,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:07,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:38:07,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:38:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:38:07,178 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 00:38:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:07,267 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2021-12-07 00:38:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:38:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-12-07 00:38:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:07,269 INFO L225 Difference]: With dead ends: 125 [2021-12-07 00:38:07,269 INFO L226 Difference]: Without dead ends: 104 [2021-12-07 00:38:07,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:38:07,270 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:07,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:38:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-07 00:38:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2021-12-07 00:38:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:38:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2021-12-07 00:38:07,283 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2021-12-07 00:38:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:07,284 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2021-12-07 00:38:07,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 00:38:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2021-12-07 00:38:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:38:07,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:07,285 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:07,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:38:07,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:07,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2021-12-07 00:38:07,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821996958] [2021-12-07 00:38:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:07,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:07,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146258975] [2021-12-07 00:38:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:07,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:07,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:07,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:07,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:38:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:38:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:38:07,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:07,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821996958] [2021-12-07 00:38:07,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146258975] [2021-12-07 00:38:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146258975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:07,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:38:07,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096430255] [2021-12-07 00:38:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:38:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:38:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:38:07,611 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 00:38:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:07,643 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2021-12-07 00:38:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:38:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2021-12-07 00:38:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:07,646 INFO L225 Difference]: With dead ends: 154 [2021-12-07 00:38:07,646 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 00:38:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:38:07,647 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:07,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 00:38:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-12-07 00:38:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:38:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2021-12-07 00:38:07,672 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2021-12-07 00:38:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2021-12-07 00:38:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 00:38:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2021-12-07 00:38:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 00:38:07,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:07,675 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:07,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:38:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:38:07,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2021-12-07 00:38:07,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961923461] [2021-12-07 00:38:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:07,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:07,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:07,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345115478] [2021-12-07 00:38:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:07,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:07,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:07,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:07,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:38:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:38:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:08,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:38:08,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961923461] [2021-12-07 00:38:08,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345115478] [2021-12-07 00:38:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345115478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:08,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:08,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-12-07 00:38:08,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456660026] [2021-12-07 00:38:08,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:08,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:38:08,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:38:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:38:08,084 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-07 00:38:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:08,209 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2021-12-07 00:38:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:38:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2021-12-07 00:38:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:08,211 INFO L225 Difference]: With dead ends: 215 [2021-12-07 00:38:08,211 INFO L226 Difference]: Without dead ends: 168 [2021-12-07 00:38:08,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:38:08,213 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:08,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 199 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:38:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-07 00:38:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2021-12-07 00:38:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 00:38:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2021-12-07 00:38:08,235 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2021-12-07 00:38:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:08,236 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2021-12-07 00:38:08,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-07 00:38:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2021-12-07 00:38:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:38:08,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:08,238 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:08,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:38:08,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:38:08,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2021-12-07 00:38:08,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:08,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680658114] [2021-12-07 00:38:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:08,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:08,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026044657] [2021-12-07 00:38:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:08,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:08,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:08,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:08,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:38:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:08,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:38:08,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:08,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:38:08,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:08,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680658114] [2021-12-07 00:38:08,718 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026044657] [2021-12-07 00:38:08,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026044657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:08,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:08,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-07 00:38:08,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623487566] [2021-12-07 00:38:08,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:08,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:38:08,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:38:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:38:08,719 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 00:38:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:08,916 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2021-12-07 00:38:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:38:08,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2021-12-07 00:38:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:08,919 INFO L225 Difference]: With dead ends: 207 [2021-12-07 00:38:08,919 INFO L226 Difference]: Without dead ends: 202 [2021-12-07 00:38:08,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:38:08,920 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:08,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 276 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:38:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-07 00:38:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2021-12-07 00:38:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-07 00:38:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2021-12-07 00:38:08,946 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2021-12-07 00:38:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:08,947 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2021-12-07 00:38:08,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 00:38:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2021-12-07 00:38:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 00:38:08,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:08,951 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:08,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:38:09,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:38:09,153 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2021-12-07 00:38:09,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34089337] [2021-12-07 00:38:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:09,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:09,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:09,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624119586] [2021-12-07 00:38:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:09,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:09,183 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:09,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:38:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:38:09,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-07 00:38:09,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-07 00:38:09,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34089337] [2021-12-07 00:38:09,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624119586] [2021-12-07 00:38:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624119586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:09,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:09,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 00:38:09,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774842688] [2021-12-07 00:38:09,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:09,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:38:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:38:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:38:09,508 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 00:38:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:09,553 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2021-12-07 00:38:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:38:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2021-12-07 00:38:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:09,556 INFO L225 Difference]: With dead ends: 498 [2021-12-07 00:38:09,556 INFO L226 Difference]: Without dead ends: 355 [2021-12-07 00:38:09,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:38:09,558 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:09,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-07 00:38:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2021-12-07 00:38:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-07 00:38:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2021-12-07 00:38:09,587 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2021-12-07 00:38:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:09,588 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2021-12-07 00:38:09,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 00:38:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2021-12-07 00:38:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 00:38:09,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:09,590 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:09,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:38:09,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:38:09,790 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2021-12-07 00:38:09,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120066495] [2021-12-07 00:38:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:09,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:09,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541916128] [2021-12-07 00:38:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:38:09,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:09,798 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:09,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:38:09,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:38:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:38:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:38:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:38:09,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-07 00:38:10,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:10,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120066495] [2021-12-07 00:38:10,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:10,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541916128] [2021-12-07 00:38:10,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541916128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:10,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:10,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-07 00:38:10,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270770729] [2021-12-07 00:38:10,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:10,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:38:10,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:38:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:38:10,086 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-07 00:38:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:10,510 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2021-12-07 00:38:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:38:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2021-12-07 00:38:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:10,517 INFO L225 Difference]: With dead ends: 981 [2021-12-07 00:38:10,517 INFO L226 Difference]: Without dead ends: 838 [2021-12-07 00:38:10,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:38:10,520 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:10,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 424 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:38:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-07 00:38:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2021-12-07 00:38:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-07 00:38:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2021-12-07 00:38:10,594 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2021-12-07 00:38:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:10,595 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2021-12-07 00:38:10,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-07 00:38:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2021-12-07 00:38:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 00:38:10,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:10,598 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:10,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:38:10,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:10,799 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2021-12-07 00:38:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884213485] [2021-12-07 00:38:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:10,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:10,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:10,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957907687] [2021-12-07 00:38:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:10,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:10,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:10,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:10,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:38:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 00:38:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:11,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-07 00:38:11,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884213485] [2021-12-07 00:38:11,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957907687] [2021-12-07 00:38:11,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957907687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:11,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:11,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-12-07 00:38:11,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461006082] [2021-12-07 00:38:11,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:11,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:38:11,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:38:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:38:11,249 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-07 00:38:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:11,729 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2021-12-07 00:38:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 00:38:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2021-12-07 00:38:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:11,734 INFO L225 Difference]: With dead ends: 1281 [2021-12-07 00:38:11,734 INFO L226 Difference]: Without dead ends: 791 [2021-12-07 00:38:11,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:38:11,736 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:11,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 442 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:38:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-12-07 00:38:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2021-12-07 00:38:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2021-12-07 00:38:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2021-12-07 00:38:11,786 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2021-12-07 00:38:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:11,786 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2021-12-07 00:38:11,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-07 00:38:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2021-12-07 00:38:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-07 00:38:11,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:11,788 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:11,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:38:11,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:38:11,989 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2021-12-07 00:38:11,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751099918] [2021-12-07 00:38:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:11,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:11,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:11,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368036220] [2021-12-07 00:38:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:11,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:11,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:11,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:38:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:38:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:38:12,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:38:12,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751099918] [2021-12-07 00:38:12,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368036220] [2021-12-07 00:38:12,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368036220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:12,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:12,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-12-07 00:38:12,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728324887] [2021-12-07 00:38:12,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:12,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:38:12,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:38:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:38:12,342 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-07 00:38:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:12,847 INFO L93 Difference]: Finished difference Result 753 states and 1015 transitions. [2021-12-07 00:38:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-07 00:38:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 99 [2021-12-07 00:38:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:12,853 INFO L225 Difference]: With dead ends: 753 [2021-12-07 00:38:12,853 INFO L226 Difference]: Without dead ends: 748 [2021-12-07 00:38:12,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 00:38:12,855 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 537 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:12,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 400 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:38:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-07 00:38:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 742. [2021-12-07 00:38:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 558 states have (on average 1.1863799283154122) internal successors, (662), 560 states have internal predecessors, (662), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 159 states have call predecessors, (161), 161 states have call successors, (161) [2021-12-07 00:38:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 985 transitions. [2021-12-07 00:38:12,924 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 985 transitions. Word has length 99 [2021-12-07 00:38:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:12,925 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 985 transitions. [2021-12-07 00:38:12,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-07 00:38:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 985 transitions. [2021-12-07 00:38:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-07 00:38:12,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:12,928 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:12,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:38:13,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:13,129 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 682851631, now seen corresponding path program 3 times [2021-12-07 00:38:13,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:13,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129123593] [2021-12-07 00:38:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:13,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:13,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659841251] [2021-12-07 00:38:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:38:13,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:13,142 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:38:13,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:38:13,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:38:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:38:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2021-12-07 00:38:13,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129123593] [2021-12-07 00:38:13,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659841251] [2021-12-07 00:38:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659841251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:13,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:38:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892466715] [2021-12-07 00:38:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:38:13,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:38:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:38:13,397 INFO L87 Difference]: Start difference. First operand 742 states and 985 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:38:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:13,456 INFO L93 Difference]: Finished difference Result 966 states and 1305 transitions. [2021-12-07 00:38:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:38:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 169 [2021-12-07 00:38:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:13,461 INFO L225 Difference]: With dead ends: 966 [2021-12-07 00:38:13,461 INFO L226 Difference]: Without dead ends: 815 [2021-12-07 00:38:13,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:38:13,462 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:13,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-12-07 00:38:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 756. [2021-12-07 00:38:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 569 states have (on average 1.1722319859402461) internal successors, (667), 571 states have internal predecessors, (667), 164 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (163), 161 states have call predecessors, (163), 163 states have call successors, (163) [2021-12-07 00:38:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 994 transitions. [2021-12-07 00:38:13,515 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 994 transitions. Word has length 169 [2021-12-07 00:38:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:13,515 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 994 transitions. [2021-12-07 00:38:13,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:38:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 994 transitions. [2021-12-07 00:38:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-07 00:38:13,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:13,519 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:13,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:38:13,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:38:13,719 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1715827176, now seen corresponding path program 4 times [2021-12-07 00:38:13,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105518959] [2021-12-07 00:38:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:13,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:13,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:13,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664435879] [2021-12-07 00:38:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:38:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:13,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:13,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:38:13,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:38:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:38:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:38:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-07 00:38:13,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:38:13,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:13,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105518959] [2021-12-07 00:38:13,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:13,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664435879] [2021-12-07 00:38:13,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664435879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:38:13,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:38:13,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:38:13,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129797738] [2021-12-07 00:38:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:38:13,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:38:13,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:38:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:38:13,886 INFO L87 Difference]: Start difference. First operand 756 states and 994 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 00:38:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:13,934 INFO L93 Difference]: Finished difference Result 1268 states and 1670 transitions. [2021-12-07 00:38:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:38:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 175 [2021-12-07 00:38:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:13,938 INFO L225 Difference]: With dead ends: 1268 [2021-12-07 00:38:13,939 INFO L226 Difference]: Without dead ends: 790 [2021-12-07 00:38:13,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:38:13,940 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:13,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:38:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-12-07 00:38:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 723. [2021-12-07 00:38:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 545 states have (on average 1.161467889908257) internal successors, (633), 548 states have internal predecessors, (633), 155 states have call successors, (155), 23 states have call predecessors, (155), 22 states have return successors, (154), 151 states have call predecessors, (154), 154 states have call successors, (154) [2021-12-07 00:38:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 942 transitions. [2021-12-07 00:38:13,983 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 942 transitions. Word has length 175 [2021-12-07 00:38:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 942 transitions. [2021-12-07 00:38:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 00:38:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 942 transitions. [2021-12-07 00:38:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-07 00:38:13,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:13,987 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:14,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-07 00:38:14,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:38:14,188 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:14,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1774864442, now seen corresponding path program 5 times [2021-12-07 00:38:14,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:14,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124988059] [2021-12-07 00:38:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:14,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:14,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595205957] [2021-12-07 00:38:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:38:14,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:14,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:14,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:38:14,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-07 00:38:14,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:38:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:38:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2021-12-07 00:38:14,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2021-12-07 00:38:14,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:14,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124988059] [2021-12-07 00:38:14,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:14,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595205957] [2021-12-07 00:38:14,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595205957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:14,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:14,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 00:38:14,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578949800] [2021-12-07 00:38:14,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:38:14,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:38:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:38:14,834 INFO L87 Difference]: Start difference. First operand 723 states and 942 transitions. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-07 00:38:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:15,956 INFO L93 Difference]: Finished difference Result 2836 states and 3887 transitions. [2021-12-07 00:38:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:38:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 175 [2021-12-07 00:38:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:15,973 INFO L225 Difference]: With dead ends: 2836 [2021-12-07 00:38:15,973 INFO L226 Difference]: Without dead ends: 2567 [2021-12-07 00:38:15,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1820, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:38:15,976 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 291 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:15,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1459 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:38:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-12-07 00:38:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1816. [2021-12-07 00:38:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1371 states have (on average 1.1816192560175054) internal successors, (1620), 1379 states have internal predecessors, (1620), 422 states have call successors, (422), 23 states have call predecessors, (422), 22 states have return successors, (421), 413 states have call predecessors, (421), 421 states have call successors, (421) [2021-12-07 00:38:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2463 transitions. [2021-12-07 00:38:16,129 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2463 transitions. Word has length 175 [2021-12-07 00:38:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:16,129 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 2463 transitions. [2021-12-07 00:38:16,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-07 00:38:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2463 transitions. [2021-12-07 00:38:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-07 00:38:16,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:16,136 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:38:16,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:38:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:38:16,336 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:38:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1985926558, now seen corresponding path program 6 times [2021-12-07 00:38:16,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:38:16,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687139722] [2021-12-07 00:38:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:16,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:38:16,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:38:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137275307] [2021-12-07 00:38:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:38:16,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:38:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:38:16,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:38:16,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:38:18,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 00:38:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:38:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:38:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 320 proven. 86 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-12-07 00:38:21,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:00,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:39:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687139722] [2021-12-07 00:39:00,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:39:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137275307] [2021-12-07 00:39:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137275307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:00,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:39:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-07 00:39:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082654237] [2021-12-07 00:39:00,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:00,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:39:00,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:39:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:39:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=325, Unknown=18, NotChecked=0, Total=420 [2021-12-07 00:39:00,601 INFO L87 Difference]: Start difference. First operand 1816 states and 2463 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 11 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-07 00:39:12,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:39:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:19,369 INFO L93 Difference]: Finished difference Result 3801 states and 5370 transitions. [2021-12-07 00:39:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:39:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 11 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) Word has length 175 [2021-12-07 00:39:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:19,386 INFO L225 Difference]: With dead ends: 3801 [2021-12-07 00:39:19,386 INFO L226 Difference]: Without dead ends: 3480 [2021-12-07 00:39:19,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=104, Invalid=522, Unknown=24, NotChecked=0, Total=650 [2021-12-07 00:39:19,388 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 60 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:19,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 683 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 146 Unchecked, 4.3s Time] [2021-12-07 00:39:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-12-07 00:39:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 2892. [2021-12-07 00:39:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2187 states have (on average 1.2016460905349795) internal successors, (2628), 2201 states have internal predecessors, (2628), 682 states have call successors, (682), 23 states have call predecessors, (682), 22 states have return successors, (681), 667 states have call predecessors, (681), 681 states have call successors, (681) [2021-12-07 00:39:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3991 transitions. [2021-12-07 00:39:19,683 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3991 transitions. Word has length 175 [2021-12-07 00:39:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:19,684 INFO L470 AbstractCegarLoop]: Abstraction has 2892 states and 3991 transitions. [2021-12-07 00:39:19,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 11 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-07 00:39:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3991 transitions. [2021-12-07 00:39:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-07 00:39:19,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:19,693 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:19,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:39:19,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:39:19,894 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash -892632122, now seen corresponding path program 7 times [2021-12-07 00:39:19,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811265448] [2021-12-07 00:39:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:19,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:19,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:19,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195928347] [2021-12-07 00:39:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:39:19,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:19,919 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:19,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:39:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:39:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:39:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-12-07 00:39:20,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:39:20,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811265448] [2021-12-07 00:39:20,661 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:39:20,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195928347] [2021-12-07 00:39:20,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195928347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:39:20,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:20,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 23 [2021-12-07 00:39:20,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264501406] [2021-12-07 00:39:20,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:20,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:39:20,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:39:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:39:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:39:20,663 INFO L87 Difference]: Start difference. First operand 2892 states and 3991 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2021-12-07 00:39:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:21,412 INFO L93 Difference]: Finished difference Result 3019 states and 4167 transitions. [2021-12-07 00:39:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:39:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) Word has length 175 [2021-12-07 00:39:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:21,425 INFO L225 Difference]: With dead ends: 3019 [2021-12-07 00:39:21,425 INFO L226 Difference]: Without dead ends: 2970 [2021-12-07 00:39:21,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:39:21,427 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 413 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:21,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 386 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:39:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-12-07 00:39:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2970. [2021-12-07 00:39:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2265 states have (on average 1.1947019867549669) internal successors, (2706), 2265 states have internal predecessors, (2706), 682 states have call successors, (682), 23 states have call predecessors, (682), 22 states have return successors, (681), 681 states have call predecessors, (681), 681 states have call successors, (681) [2021-12-07 00:39:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4069 transitions. [2021-12-07 00:39:21,721 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4069 transitions. Word has length 175 [2021-12-07 00:39:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:21,721 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 4069 transitions. [2021-12-07 00:39:21,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2021-12-07 00:39:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4069 transitions. [2021-12-07 00:39:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:39:21,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:21,729 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:21,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:39:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:21,930 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2005289494, now seen corresponding path program 2 times [2021-12-07 00:39:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543975961] [2021-12-07 00:39:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:21,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:21,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962951553] [2021-12-07 00:39:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:39:21,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:21,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:21,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:39:22,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:39:22,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:39:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:39:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 493 proven. 112 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-07 00:39:23,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-12-07 00:39:24,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:39:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543975961] [2021-12-07 00:39:24,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:39:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962951553] [2021-12-07 00:39:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962951553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:39:24,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-12-07 00:39:24,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552609609] [2021-12-07 00:39:24,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:24,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:39:24,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:39:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:39:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:39:24,310 INFO L87 Difference]: Start difference. First operand 2970 states and 4069 transitions. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 18 states have internal predecessors, (118), 14 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) [2021-12-07 00:39:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:28,238 INFO L93 Difference]: Finished difference Result 5715 states and 7983 transitions. [2021-12-07 00:39:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:39:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 18 states have internal predecessors, (118), 14 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) Word has length 179 [2021-12-07 00:39:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:28,257 INFO L225 Difference]: With dead ends: 5715 [2021-12-07 00:39:28,258 INFO L226 Difference]: Without dead ends: 4390 [2021-12-07 00:39:28,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 00:39:28,261 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 171 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:28,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1747 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 485 Invalid, 0 Unknown, 295 Unchecked, 2.8s Time] [2021-12-07 00:39:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-12-07 00:39:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 3406. [2021-12-07 00:39:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 2596 states have (on average 1.2033898305084745) internal successors, (3124), 2596 states have internal predecessors, (3124), 768 states have call successors, (768), 42 states have call predecessors, (768), 41 states have return successors, (767), 767 states have call predecessors, (767), 767 states have call successors, (767) [2021-12-07 00:39:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 4659 transitions. [2021-12-07 00:39:28,617 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 4659 transitions. Word has length 179 [2021-12-07 00:39:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:28,617 INFO L470 AbstractCegarLoop]: Abstraction has 3406 states and 4659 transitions. [2021-12-07 00:39:28,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 18 states have internal predecessors, (118), 14 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) [2021-12-07 00:39:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 4659 transitions. [2021-12-07 00:39:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:39:28,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:28,628 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:28,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 00:39:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:28,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash 956641480, now seen corresponding path program 3 times [2021-12-07 00:39:28,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:28,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099001667] [2021-12-07 00:39:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:28,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:28,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103583446] [2021-12-07 00:39:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:39:28,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:28,837 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:28,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:39:28,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:39:28,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:39:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:39:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2021-12-07 00:39:29,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:35,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:39:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099001667] [2021-12-07 00:39:35,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:39:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103583446] [2021-12-07 00:39:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103583446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:35,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:39:35,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-07 00:39:35,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751089429] [2021-12-07 00:39:35,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:39:35,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:39:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:39:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2021-12-07 00:39:35,317 INFO L87 Difference]: Start difference. First operand 3406 states and 4659 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:39:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:35,788 INFO L93 Difference]: Finished difference Result 3588 states and 4915 transitions. [2021-12-07 00:39:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:39:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 179 [2021-12-07 00:39:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:35,804 INFO L225 Difference]: With dead ends: 3588 [2021-12-07 00:39:35,805 INFO L226 Difference]: Without dead ends: 3524 [2021-12-07 00:39:35,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2021-12-07 00:39:35,806 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:35,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 263 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:39:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-12-07 00:39:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 3167. [2021-12-07 00:39:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 2402 states have (on average 1.1973355537052457) internal successors, (2876), 2435 states have internal predecessors, (2876), 720 states have call successors, (720), 45 states have call predecessors, (720), 44 states have return successors, (719), 686 states have call predecessors, (719), 719 states have call successors, (719) [2021-12-07 00:39:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 4315 transitions. [2021-12-07 00:39:36,130 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 4315 transitions. Word has length 179 [2021-12-07 00:39:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:36,131 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 4315 transitions. [2021-12-07 00:39:36,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:39:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 4315 transitions. [2021-12-07 00:39:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:39:36,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:36,138 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:36,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:39:36,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:36,339 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 25864770, now seen corresponding path program 4 times [2021-12-07 00:39:36,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653288712] [2021-12-07 00:39:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:36,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:36,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704966584] [2021-12-07 00:39:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:39:36,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:36,372 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:36,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:39:36,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:39:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:39:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:39:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-12-07 00:39:36,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-12-07 00:39:37,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:39:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653288712] [2021-12-07 00:39:37,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:39:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704966584] [2021-12-07 00:39:37,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704966584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:39:37,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:37,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-07 00:39:37,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039052719] [2021-12-07 00:39:37,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:39:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:39:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:39:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:39:37,057 INFO L87 Difference]: Start difference. First operand 3167 states and 4315 transitions. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-07 00:39:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:38,182 INFO L93 Difference]: Finished difference Result 5527 states and 7705 transitions. [2021-12-07 00:39:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 00:39:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) Word has length 179 [2021-12-07 00:39:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:38,205 INFO L225 Difference]: With dead ends: 5527 [2021-12-07 00:39:38,205 INFO L226 Difference]: Without dead ends: 4082 [2021-12-07 00:39:38,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:39:38,209 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 214 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:38,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 960 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:39:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-12-07 00:39:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3305. [2021-12-07 00:39:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2508 states have (on average 1.1981658692185009) internal successors, (3005), 2545 states have internal predecessors, (3005), 752 states have call successors, (752), 45 states have call predecessors, (752), 44 states have return successors, (751), 714 states have call predecessors, (751), 751 states have call successors, (751) [2021-12-07 00:39:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 4508 transitions. [2021-12-07 00:39:38,607 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 4508 transitions. Word has length 179 [2021-12-07 00:39:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:38,607 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 4508 transitions. [2021-12-07 00:39:38,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-07 00:39:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 4508 transitions. [2021-12-07 00:39:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:39:38,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:38,614 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:38,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-07 00:39:38,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:38,815 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -95756022, now seen corresponding path program 5 times [2021-12-07 00:39:38,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96203120] [2021-12-07 00:39:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:38,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:38,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:38,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140298019] [2021-12-07 00:39:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:39:38,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:38,850 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:38,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:39:40,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-07 00:39:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-07 00:39:40,374 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 00:39:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:39:40,461 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 00:39:40,461 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-07 00:39:40,462 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 00:39:40,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 00:39:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:39:40,673 INFO L732 BasicCegarLoop]: Path program histogram: [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:40,682 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:39:40,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:39:40 BoogieIcfgContainer [2021-12-07 00:39:40,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:39:40,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:39:40,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:39:40,758 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:39:40,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:37:59" (3/4) ... [2021-12-07 00:39:40,759 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-07 00:39:40,813 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-07 00:39:40,813 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:39:40,813 INFO L158 Benchmark]: Toolchain (without parser) took 101458.05ms. Allocated memory was 130.0MB in the beginning and 207.6MB in the end (delta: 77.6MB). Free memory was 93.3MB in the beginning and 71.0MB in the end (delta: 22.3MB). Peak memory consumption was 100.0MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,813 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 109.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:39:40,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.69ms. Allocated memory is still 130.0MB. Free memory was 93.1MB in the beginning and 83.0MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,814 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.37ms. Allocated memory is still 130.0MB. Free memory was 82.8MB in the beginning and 81.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:39:40,814 INFO L158 Benchmark]: Boogie Preprocessor took 18.48ms. Allocated memory is still 130.0MB. Free memory was 81.3MB in the beginning and 80.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,814 INFO L158 Benchmark]: RCFGBuilder took 257.46ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 105.6MB in the end (delta: -25.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,815 INFO L158 Benchmark]: TraceAbstraction took 100921.32ms. Allocated memory was 130.0MB in the beginning and 207.6MB in the end (delta: 77.6MB). Free memory was 105.1MB in the beginning and 78.3MB in the end (delta: 26.8MB). Peak memory consumption was 107.3MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,815 INFO L158 Benchmark]: Witness Printer took 55.43ms. Allocated memory is still 207.6MB. Free memory was 78.3MB in the beginning and 71.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-07 00:39:40,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 109.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.69ms. Allocated memory is still 130.0MB. Free memory was 93.1MB in the beginning and 83.0MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.37ms. Allocated memory is still 130.0MB. Free memory was 82.8MB in the beginning and 81.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.48ms. Allocated memory is still 130.0MB. Free memory was 81.3MB in the beginning and 80.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 257.46ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 105.6MB in the end (delta: -25.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 100921.32ms. Allocated memory was 130.0MB in the beginning and 207.6MB in the end (delta: 77.6MB). Free memory was 105.1MB in the beginning and 78.3MB in the end (delta: 26.8MB). Peak memory consumption was 107.3MB. Max. memory is 16.1GB. * Witness Printer took 55.43ms. Allocated memory is still 207.6MB. Free memory was 78.3MB in the beginning and 71.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=573, counter=0, R=23, r=-44, u=47, v=1] [L34] EXPR counter++ VAL [A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=1, r=-44, R=23, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=1, r=-44, R=23, u=47, v=1] [L39] EXPR counter++ VAL [A=573, counter=2, counter++=1, r=-44, R=23, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=2, R=23, r=-44, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [A=573, counter=2, r=-44, R=23, u=47, v=1] [L47] EXPR counter++ VAL [A=573, counter=3, counter++=2, r=-44, R=23, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=3, R=23, r=-44, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=3, R=23, r=3, u=49, v=1] [L47] EXPR counter++ VAL [A=573, counter=4, counter++=3, r=3, R=23, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [A=573, counter=4, r=3, R=23, u=49, v=1] [L34] EXPR counter++ VAL [A=573, counter=5, counter++=4, r=3, R=23, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=5, R=23, r=3, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=5, r=3, R=23, u=49, v=1] [L39] EXPR counter++ VAL [A=573, counter=6, counter++=5, R=23, r=3, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=6, r=3, R=23, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=6, R=23, r=2, u=49, v=3] [L39] EXPR counter++ VAL [A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=7, r=2, R=23, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=7, r=-1, R=23, u=49, v=5] [L39] EXPR counter++ VAL [A=573, counter=8, counter++=7, R=23, r=-1, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=8, R=23, r=-1, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [A=573, counter=8, r=-1, R=23, u=49, v=5] [L47] EXPR counter++ VAL [A=573, counter=9, counter++=8, R=23, r=-1, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=9, r=-1, R=23, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [A=573, counter=10, counter++=9, R=23, r=48, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=10, r=48, R=23, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [A=573, counter=10, R=23, r=48, u=51, v=5] [L34] EXPR counter++ VAL [A=573, counter=11, counter++=10, r=48, R=23, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=11, r=48, R=23, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=11, r=48, R=23, u=51, v=5] [L39] EXPR counter++ VAL [A=573, counter=12, counter++=11, R=23, r=48, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=12, r=48, R=23, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=12, R=23, r=43, u=51, v=7] [L39] EXPR counter++ VAL [A=573, counter=13, counter++=12, R=23, r=43, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=13, r=43, R=23, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [A=573, counter=14, counter++=13, R=23, r=36, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=14, r=36, R=23, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=14, R=23, r=27, u=51, v=11] [L39] EXPR counter++ VAL [A=573, counter=15, counter++=14, r=27, R=23, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=15, R=23, r=27, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=15, R=23, r=16, u=51, v=13] [L39] EXPR counter++ VAL [A=573, counter=16, counter++=15, R=23, r=16, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=16, R=23, r=16, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [A=573, counter=17, counter++=16, r=3, R=23, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=17, R=23, r=3, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=17, r=-12, R=23, u=51, v=17] [L39] EXPR counter++ VAL [A=573, counter=18, counter++=17, R=23, r=-12, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [A=573, counter=18, r=-12, R=23, u=51, v=17] [L47] EXPR counter++ VAL [A=573, counter=19, counter++=18, R=23, r=-12, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=19, R=23, r=-12, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=19, r=39, R=23, u=53, v=17] [L47] EXPR counter++ VAL [A=573, counter=20, counter++=19, r=39, R=23, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [A=573, counter=20, R=23, r=39, u=53, v=17] [L34] EXPR counter++ VAL [A=573, counter=21, counter++=20, r=39, R=23, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 100.8s, OverallIterations: 23, TraceHistogramMax: 21, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 32.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3166 SdHoareTripleChecker+Valid, 13.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3138 mSDsluCounter, 8470 SdHoareTripleChecker+Invalid, 13.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 441 IncrementalHoareTripleChecker+Unchecked, 6870 mSDsCounter, 1816 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3664 IncrementalHoareTripleChecker+Invalid, 5921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1816 mSolverCounterUnsat, 1600 mSDtfsCounter, 3664 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3614 GetRequests, 3224 SyntacticMatches, 7 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 63.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3406occurred in iteration=20, InterpolantAutomatonStates: 369, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 3778 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 54.7s InterpolantComputationTime, 2278 NumberOfCodeBlocks, 1953 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 3335 ConstructedInterpolants, 104 QuantifiedInterpolants, 14458 SizeOfPredicates, 90 NumberOfNonLiveVariables, 4325 ConjunctsInSsa, 274 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 11413/14110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-07 00:39:41,023 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-07 00:39:41,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd83e06-e1ad-4122-beb2-ead320f2eb44/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE