./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/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 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:37:14,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:37:14,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:37:14,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:37:14,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:37:14,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:37:14,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:37:14,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:37:14,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:37:14,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:37:14,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:37:14,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:37:14,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:37:14,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:37:14,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:37:14,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:37:14,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:37:14,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:37:14,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:37:14,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:37:14,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:37:14,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:37:14,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:37:14,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:37:14,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:37:14,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:37:14,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:37:14,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:37:14,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:37:14,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:37:14,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:37:14,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:37:14,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:37:14,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:37:14,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:37:14,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:37:14,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:37:14,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:37:14,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:37:14,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:37:14,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:37:14,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:37:14,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:37:14,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:37:14,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:37:14,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:37:14,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:37:14,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:37:14,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:37:14,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:37:14,635 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:37:14,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:37:14,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:37:14,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:37:14,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:37:14,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:37:14,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:37:14,638 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:37:14,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:37:14,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:37:14,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:37:14,638 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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 [2021-12-06 19:37:14,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:37:14,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:37:14,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:37:14,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:37:14,838 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:37:14,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-12-06 19:37:14,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/data/9b2cfa9a7/17ad15d631f24d06838364844b82ff3f/FLAG5c4dda137 [2021-12-06 19:37:15,251 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:37:15,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-12-06 19:37:15,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/data/9b2cfa9a7/17ad15d631f24d06838364844b82ff3f/FLAG5c4dda137 [2021-12-06 19:37:15,266 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/data/9b2cfa9a7/17ad15d631f24d06838364844b82ff3f [2021-12-06 19:37:15,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:37:15,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:37:15,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:37:15,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:37:15,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:37:15,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60595b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15, skipping insertion in model container [2021-12-06 19:37:15,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:37:15,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:37:15,411 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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2021-12-06 19:37:15,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:37:15,433 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:37:15,442 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_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2021-12-06 19:37:15,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:37:15,458 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:37:15,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15 WrapperNode [2021-12-06 19:37:15,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:37:15,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:37:15,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:37:15,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:37:15,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,490 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2021-12-06 19:37:15,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:37:15,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:37:15,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:37:15,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:37:15,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:37:15,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:37:15,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:37:15,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:37:15,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (1/1) ... [2021-12-06 19:37:15,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:37:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:15,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:37:15,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:37:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:37:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:37:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:37:15,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:37:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:37:15,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:37:15,627 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:37:15,628 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:37:15,711 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:37:15,716 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:37:15,716 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:37:15,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:37:15 BoogieIcfgContainer [2021-12-06 19:37:15,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:37:15,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:37:15,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:37:15,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:37:15,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:37:15" (1/3) ... [2021-12-06 19:37:15,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af3c0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:37:15, skipping insertion in model container [2021-12-06 19:37:15,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:37:15" (2/3) ... [2021-12-06 19:37:15,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af3c0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:37:15, skipping insertion in model container [2021-12-06 19:37:15,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:37:15" (3/3) ... [2021-12-06 19:37:15,724 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2021-12-06 19:37:15,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:37:15,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:37:15,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:37:15,771 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:37:15,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:37:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:37:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:37:15,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:15,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:15,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:15,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2021-12-06 19:37:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:15,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276882461] [2021-12-06 19:37:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:15,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:37:15,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276882461] [2021-12-06 19:37:15,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276882461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:15,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:15,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:37:15,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722139090] [2021-12-06 19:37:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:15,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:37:15,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:37:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:37:15,935 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:15,953 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2021-12-06 19:37:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:37:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:37:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:15,960 INFO L225 Difference]: With dead ends: 50 [2021-12-06 19:37:15,960 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 19:37:15,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:37:15,965 INFO L933 BasicCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:15,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 19:37:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 19:37:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:37:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-12-06 19:37:15,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-12-06 19:37:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:15,998 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-12-06 19:37:15,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-12-06 19:37:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:37:15,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:15,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:16,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:37:16,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2021-12-06 19:37:16,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:16,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73314879] [2021-12-06 19:37:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:37:16,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73314879] [2021-12-06 19:37:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73314879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:16,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:16,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893157056] [2021-12-06 19:37:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:37:16,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:37:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:16,049 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:16,065 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2021-12-06 19:37:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:37:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:37:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:16,067 INFO L225 Difference]: With dead ends: 36 [2021-12-06 19:37:16,067 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 19:37:16,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:16,069 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:16,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 19:37:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 19:37:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:37:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-12-06 19:37:16,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2021-12-06 19:37:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:16,076 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-12-06 19:37:16,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-12-06 19:37:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:37:16,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:16,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:16,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:37:16,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2021-12-06 19:37:16,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:16,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504782835] [2021-12-06 19:37:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:37:16,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:16,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504782835] [2021-12-06 19:37:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504782835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:16,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:16,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:16,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832294885] [2021-12-06 19:37:16,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:16,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:16,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:37:16,166 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:16,219 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-06 19:37:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:37:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:37:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:16,220 INFO L225 Difference]: With dead ends: 30 [2021-12-06 19:37:16,220 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 19:37:16,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:16,222 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:16,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 19:37:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 19:37:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:37:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-06 19:37:16,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2021-12-06 19:37:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:16,231 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-06 19:37:16,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-06 19:37:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:37:16,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:16,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:16,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:37:16,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2021-12-06 19:37:16,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:16,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168848131] [2021-12-06 19:37:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:16,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:16,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005813430] [2021-12-06 19:37:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:16,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:16,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:37:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:37:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:37:16,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:16,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168848131] [2021-12-06 19:37:16,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005813430] [2021-12-06 19:37:16,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005813430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:16,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:16,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:16,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894920751] [2021-12-06 19:37:16,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:16,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:16,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:37:16,373 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:37:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:16,420 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-12-06 19:37:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:37:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-06 19:37:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:16,421 INFO L225 Difference]: With dead ends: 46 [2021-12-06 19:37:16,421 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 19:37:16,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:16,423 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:16,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 19:37:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-12-06 19:37:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:37:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-12-06 19:37:16,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2021-12-06 19:37:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:16,436 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-12-06 19:37:16,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:37:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-12-06 19:37:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 19:37:16,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:16,437 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:16,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:37:16,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:16,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2021-12-06 19:37:16,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:16,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346512585] [2021-12-06 19:37:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:16,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570777548] [2021-12-06 19:37:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:16,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:16,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:16,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:37:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:16,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:37:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:37:16,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:16,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346512585] [2021-12-06 19:37:16,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570777548] [2021-12-06 19:37:16,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570777548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:16,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:16,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:16,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933782853] [2021-12-06 19:37:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:16,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:16,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:37:16,895 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2021-12-06 19:37:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:16,934 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-06 19:37:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:37:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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 18 [2021-12-06 19:37:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:16,935 INFO L225 Difference]: With dead ends: 50 [2021-12-06 19:37:16,935 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 19:37:16,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:16,937 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:16,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 19:37:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-06 19:37:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 19:37:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2021-12-06 19:37:16,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2021-12-06 19:37:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:16,946 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2021-12-06 19:37:16,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2021-12-06 19:37:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2021-12-06 19:37:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 19:37:16,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:16,947 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:16,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:37:17,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:17,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2021-12-06 19:37:17,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:17,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884129834] [2021-12-06 19:37:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:17,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:17,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:17,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413198544] [2021-12-06 19:37:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:17,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:17,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:17,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:37:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:37:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:37:17,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:17,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884129834] [2021-12-06 19:37:17,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413198544] [2021-12-06 19:37:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413198544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:17,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:17,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:17,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786837388] [2021-12-06 19:37:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:17,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:37:17,373 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:37:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:17,425 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-12-06 19:37:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:37:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-12-06 19:37:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:17,427 INFO L225 Difference]: With dead ends: 58 [2021-12-06 19:37:17,427 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 19:37:17,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:17,429 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:17,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 19:37:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 19:37:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:37:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-12-06 19:37:17,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2021-12-06 19:37:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:17,440 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-12-06 19:37:17,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:37:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-12-06 19:37:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:37:17,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:17,443 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:17,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:37:17,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:17,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2021-12-06 19:37:17,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:17,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603160536] [2021-12-06 19:37:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:17,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:17,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:17,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940198464] [2021-12-06 19:37:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:17,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:17,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:17,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:37:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:37:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 19:37:17,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:37:17,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603160536] [2021-12-06 19:37:17,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940198464] [2021-12-06 19:37:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940198464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:17,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:17,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 19:37:17,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67615637] [2021-12-06 19:37:17,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:17,867 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:37:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:17,990 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-12-06 19:37:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:37:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2021-12-06 19:37:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:17,992 INFO L225 Difference]: With dead ends: 116 [2021-12-06 19:37:17,992 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 19:37:17,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:37:17,993 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:17,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 19:37:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-06 19:37:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:37:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2021-12-06 19:37:18,015 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2021-12-06 19:37:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:18,015 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2021-12-06 19:37:18,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:37:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2021-12-06 19:37:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:37:18,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:18,017 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:18,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:37:18,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:18,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2021-12-06 19:37:18,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960070837] [2021-12-06 19:37:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:18,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:18,251 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:18,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860215648] [2021-12-06 19:37:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:18,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:18,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:18,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:37:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:37:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:37:18,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:37:18,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960070837] [2021-12-06 19:37:18,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860215648] [2021-12-06 19:37:18,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860215648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:18,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:18,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-06 19:37:18,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070694889] [2021-12-06 19:37:18,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:18,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:18,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:18,493 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:37:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:18,746 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-12-06 19:37:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:37:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-12-06 19:37:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:18,749 INFO L225 Difference]: With dead ends: 114 [2021-12-06 19:37:18,749 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 19:37:18,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:37:18,750 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:18,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:37:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 19:37:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-06 19:37:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:37:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2021-12-06 19:37:18,774 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2021-12-06 19:37:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:18,774 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2021-12-06 19:37:18,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:37:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2021-12-06 19:37:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:37:18,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:18,776 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:18,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:37:18,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:37:18,977 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2021-12-06 19:37:18,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:18,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104204766] [2021-12-06 19:37:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:18,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:18,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096716314] [2021-12-06 19:37:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:18,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:18,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:37:19,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:37:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:37:19,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:37:19,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104204766] [2021-12-06 19:37:19,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096716314] [2021-12-06 19:37:19,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096716314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:19,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:19,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-06 19:37:19,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278753642] [2021-12-06 19:37:19,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:19,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:19,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:19,201 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 19:37:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:19,285 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-12-06 19:37:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:37:19,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-12-06 19:37:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:19,287 INFO L225 Difference]: With dead ends: 118 [2021-12-06 19:37:19,287 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 19:37:19,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:37:19,289 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 19:37:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-12-06 19:37:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:37:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2021-12-06 19:37:19,308 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46 [2021-12-06 19:37:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2021-12-06 19:37:19,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 19:37:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2021-12-06 19:37:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:37:19,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:19,310 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:19,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:37:19,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:19,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times [2021-12-06 19:37:19,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766941082] [2021-12-06 19:37:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:19,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:19,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:19,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648270374] [2021-12-06 19:37:19,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:37:19,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:19,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:19,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:37:19,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 19:37:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:37:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 19:37:19,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 19:37:20,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766941082] [2021-12-06 19:37:20,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648270374] [2021-12-06 19:37:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648270374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:20,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:20,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-06 19:37:20,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304819934] [2021-12-06 19:37:20,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:20,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:20,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:20,016 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 19:37:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:20,221 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-12-06 19:37:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:37:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2021-12-06 19:37:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:20,223 INFO L225 Difference]: With dead ends: 142 [2021-12-06 19:37:20,223 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 19:37:20,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:37:20,224 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:20,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:37:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 19:37:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-06 19:37:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 19:37:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2021-12-06 19:37:20,236 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51 [2021-12-06 19:37:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2021-12-06 19:37:20,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 19:37:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2021-12-06 19:37:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:37:20,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:20,237 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:20,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:37:20,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:20,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2021-12-06 19:37:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:20,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887372859] [2021-12-06 19:37:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:20,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:20,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:20,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774170112] [2021-12-06 19:37:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:20,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:20,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:20,462 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:20,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:37:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 19:37:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-06 19:37:20,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:20,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887372859] [2021-12-06 19:37:20,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:20,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774170112] [2021-12-06 19:37:20,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774170112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:20,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 19:37:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726035] [2021-12-06 19:37:20,818 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:20,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:37:20,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:37:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:37:20,819 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 19:37:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:20,901 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2021-12-06 19:37:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:37:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2021-12-06 19:37:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:20,903 INFO L225 Difference]: With dead ends: 137 [2021-12-06 19:37:20,903 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 19:37:20,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:37:20,905 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:20,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 175 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 19:37:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-06 19:37:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 19:37:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-06 19:37:20,918 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 67 [2021-12-06 19:37:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-06 19:37:20,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 19:37:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-06 19:37:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 19:37:20,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:20,920 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:20,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:37:21,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:37:21,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2021-12-06 19:37:21,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:21,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995200815] [2021-12-06 19:37:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:21,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:21,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500644797] [2021-12-06 19:37:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:21,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:21,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:37:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:37:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-06 19:37:21,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995200815] [2021-12-06 19:37:21,616 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500644797] [2021-12-06 19:37:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500644797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:21,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:21,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 19:37:21,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857799407] [2021-12-06 19:37:21,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:21,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:37:21,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:37:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:37:21,618 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:37:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:21,686 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-06 19:37:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:37:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2021-12-06 19:37:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:21,687 INFO L225 Difference]: With dead ends: 135 [2021-12-06 19:37:21,687 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 19:37:21,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:37:21,689 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:21,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:37:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 19:37:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-06 19:37:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:37:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-06 19:37:21,701 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 72 [2021-12-06 19:37:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:21,702 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-06 19:37:21,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:37:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-06 19:37:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 19:37:21,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:21,703 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-06 19:37:21,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:37:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:21,904 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:21,904 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times [2021-12-06 19:37:21,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:21,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961985100] [2021-12-06 19:37:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:21,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:21,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042597243] [2021-12-06 19:37:21,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:37:21,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:21,913 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:21,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:37:22,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:37:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 19:37:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 95 proven. 52 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-06 19:37:22,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 97 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-06 19:37:22,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961985100] [2021-12-06 19:37:22,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042597243] [2021-12-06 19:37:22,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042597243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:22,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:22,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-12-06 19:37:22,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692923636] [2021-12-06 19:37:22,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:22,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:37:22,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:37:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:37:22,506 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-06 19:37:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:22,646 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-12-06 19:37:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:37:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2021-12-06 19:37:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:22,648 INFO L225 Difference]: With dead ends: 134 [2021-12-06 19:37:22,648 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 19:37:22,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:37:22,649 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:22,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 80 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 19:37:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-06 19:37:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 19:37:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-12-06 19:37:22,663 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74 [2021-12-06 19:37:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:22,663 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-12-06 19:37:22,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-06 19:37:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-12-06 19:37:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:37:22,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:22,665 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:22,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:37:22,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:37:22,866 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2021-12-06 19:37:22,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:22,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388829932] [2021-12-06 19:37:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:22,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:22,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:22,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428853493] [2021-12-06 19:37:22,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:22,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:22,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:22,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:22,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:37:22,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:37:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 19:37:23,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:23,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388829932] [2021-12-06 19:37:23,372 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428853493] [2021-12-06 19:37:23,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428853493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:23,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:23,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 19:37:23,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795846008] [2021-12-06 19:37:23,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:23,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:23,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:37:23,374 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 19:37:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:23,493 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-12-06 19:37:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:37:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95 [2021-12-06 19:37:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:23,495 INFO L225 Difference]: With dead ends: 134 [2021-12-06 19:37:23,495 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 19:37:23,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:37:23,496 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:23,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 240 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 19:37:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-06 19:37:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:37:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2021-12-06 19:37:23,509 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95 [2021-12-06 19:37:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:23,509 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2021-12-06 19:37:23,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 19:37:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2021-12-06 19:37:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:37:23,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:23,510 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:23,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:37:23,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 19:37:23,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times [2021-12-06 19:37:23,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605086952] [2021-12-06 19:37:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:23,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:23,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678881586] [2021-12-06 19:37:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:23,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:23,750 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:37:23,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:37:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 19:37:24,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:24,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605086952] [2021-12-06 19:37:24,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678881586] [2021-12-06 19:37:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678881586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:24,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:24,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 19:37:24,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921820022] [2021-12-06 19:37:24,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:37:24,191 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-06 19:37:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:24,295 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-12-06 19:37:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:37:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100 [2021-12-06 19:37:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:24,296 INFO L225 Difference]: With dead ends: 138 [2021-12-06 19:37:24,296 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 19:37:24,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:37:24,297 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:24,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 19:37:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-06 19:37:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:37:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-06 19:37:24,306 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100 [2021-12-06 19:37:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:24,306 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-06 19:37:24,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-06 19:37:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-06 19:37:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 19:37:24,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:24,307 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:24,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:37:24,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:37:24,509 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times [2021-12-06 19:37:24,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:24,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982777051] [2021-12-06 19:37:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:24,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:24,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:24,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196634662] [2021-12-06 19:37:24,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:37:24,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:24,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:24,540 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:24,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:37:25,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:37:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:25,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 19:37:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-06 19:37:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-06 19:37:28,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:28,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982777051] [2021-12-06 19:37:28,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:28,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196634662] [2021-12-06 19:37:28,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196634662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:28,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:28,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-12-06 19:37:28,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396811325] [2021-12-06 19:37:28,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:28,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:37:28,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:37:28,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:37:28,544 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-06 19:37:31,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 19:37:33,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 19:37:34,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 19:37:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:36,667 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-12-06 19:37:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:37:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 123 [2021-12-06 19:37:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:36,668 INFO L225 Difference]: With dead ends: 134 [2021-12-06 19:37:36,668 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 19:37:36,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:37:36,669 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:36,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 160 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 183 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 19:37:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 19:37:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-06 19:37:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:37:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-12-06 19:37:36,679 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123 [2021-12-06 19:37:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:36,680 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-12-06 19:37:36,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-06 19:37:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-12-06 19:37:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 19:37:36,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:36,681 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:36,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:37:36,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:37:36,882 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:36,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2021-12-06 19:37:36,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985811880] [2021-12-06 19:37:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:36,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:36,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:36,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855384868] [2021-12-06 19:37:36,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:36,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:36,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:36,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:37:36,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:37:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 19:37:37,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-06 19:37:37,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985811880] [2021-12-06 19:37:37,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855384868] [2021-12-06 19:37:37,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855384868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:37,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:37,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 19:37:37,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926975398] [2021-12-06 19:37:37,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:37,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:37:37,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:37:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:37:37,224 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-12-06 19:37:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:37,478 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2021-12-06 19:37:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:37:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2021-12-06 19:37:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:37,482 INFO L225 Difference]: With dead ends: 390 [2021-12-06 19:37:37,482 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 19:37:37,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:37:37,483 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 146 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:37,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 255 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:37:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 19:37:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2021-12-06 19:37:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-12-06 19:37:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions. [2021-12-06 19:37:37,525 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125 [2021-12-06 19:37:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:37,525 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions. [2021-12-06 19:37:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-12-06 19:37:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions. [2021-12-06 19:37:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 19:37:37,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:37,527 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:37,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:37:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:37,728 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times [2021-12-06 19:37:37,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:37,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903005056] [2021-12-06 19:37:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:37,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:37,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:37,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446001661] [2021-12-06 19:37:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:37:37,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:37,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:37,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:37,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:37:38,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:37:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 19:37:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 126 proven. 86 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-06 19:37:39,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 151 proven. 39 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-12-06 19:37:40,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903005056] [2021-12-06 19:37:40,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:37:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446001661] [2021-12-06 19:37:40,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446001661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:40,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:40,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-12-06 19:37:40,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003372193] [2021-12-06 19:37:40,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:40,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:37:40,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:37:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:37:40,326 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-06 19:37:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:41,990 INFO L93 Difference]: Finished difference Result 326 states and 341 transitions. [2021-12-06 19:37:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:37:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 128 [2021-12-06 19:37:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:41,992 INFO L225 Difference]: With dead ends: 326 [2021-12-06 19:37:41,992 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 19:37:41,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:37:41,993 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:41,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:37:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 19:37:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-12-06 19:37:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 189 states have internal predecessors, (190), 53 states have call successors, (53), 51 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-06 19:37:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2021-12-06 19:37:42,018 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 128 [2021-12-06 19:37:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:42,018 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2021-12-06 19:37:42,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-06 19:37:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2021-12-06 19:37:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-06 19:37:42,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:42,020 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:42,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:37:42,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:37:42,221 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2021-12-06 19:37:42,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043037095] [2021-12-06 19:37:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:42,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:37:42,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193797535] [2021-12-06 19:37:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:37:42,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:42,235 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:42,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:37:42,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-12-06 19:37:42,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-06 19:37:42,507 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:37:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:37:42,745 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:37:42,745 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:37:42,745 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 19:37:42,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:37:42,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:42,956 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:42,966 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:37:43,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:37:43 BoogieIcfgContainer [2021-12-06 19:37:43,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:37:43,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:37:43,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:37:43,052 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:37:43,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:37:15" (3/4) ... [2021-12-06 19:37:43,053 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 19:37:43,119 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:37:43,119 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:37:43,119 INFO L158 Benchmark]: Toolchain (without parser) took 27850.45ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 64.0MB in the beginning and 76.1MB in the end (delta: -12.1MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,119 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 80.2MB in the end (delta: 117.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:37:43,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.70ms. Allocated memory is still 102.8MB. Free memory was 63.8MB in the beginning and 77.4MB in the end (delta: -13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,120 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.79ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 75.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,120 INFO L158 Benchmark]: Boogie Preprocessor took 16.56ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 74.8MB in the end (delta: 909.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:37:43,120 INFO L158 Benchmark]: RCFGBuilder took 208.93ms. Allocated memory is still 102.8MB. Free memory was 74.8MB in the beginning and 64.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,121 INFO L158 Benchmark]: TraceAbstraction took 27332.67ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 64.4MB in the beginning and 87.6MB in the end (delta: -23.2MB). Peak memory consumption was 63.0MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,121 INFO L158 Benchmark]: Witness Printer took 67.10ms. Allocated memory is still 125.8MB. Free memory was 87.6MB in the beginning and 76.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:37:43,122 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 102.8MB. Free memory was 80.3MB in the beginning and 80.2MB in the end (delta: 117.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.70ms. Allocated memory is still 102.8MB. Free memory was 63.8MB in the beginning and 77.4MB in the end (delta: -13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.79ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 75.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.56ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 74.8MB in the end (delta: 909.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 208.93ms. Allocated memory is still 102.8MB. Free memory was 74.8MB in the beginning and 64.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27332.67ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 64.4MB in the beginning and 87.6MB in the end (delta: -23.2MB). Peak memory consumption was 63.0MB. Max. memory is 16.1GB. * Witness Printer took 67.10ms. Allocated memory is still 125.8MB. Free memory was 87.6MB in the beginning and 76.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. 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: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [a=10, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [a=10, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [a=10, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [a=10, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [a=10, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [a=10, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [a=10, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=6, n=6, x=216, y=127, z=42] [L33] EXPR counter++ VAL [a=10, counter=7, counter++=6, n=6, x=216, y=127, z=42] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=7, n=7, x=343, y=169, z=48] [L33] EXPR counter++ VAL [a=10, counter=8, counter++=7, n=7, x=343, y=169, z=48] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=8, n=8, x=512, y=217, z=54] [L33] EXPR counter++ VAL [a=10, counter=9, counter++=8, n=8, x=512, y=217, z=54] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=9, n=9, x=729, y=271, z=60] [L33] EXPR counter++ VAL [a=10, counter=10, counter++=9, n=9, x=729, y=271, z=60] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=10, n=10, x=1000, y=331, z=66] [L33] EXPR counter++ VAL [a=10, counter=11, counter++=10, n=10, x=1000, y=331, z=66] [L33] COND FALSE !(counter++<10) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, counter=11] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [a=10, counter=11, n=10, x=1000, y=331, z=66] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.2s, OverallIterations: 19, TraceHistogramMax: 52, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 438 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 380 mSDsluCounter, 3072 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2341 mSDsCounter, 471 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1951 IncrementalHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 471 mSolverCounterUnsat, 731 mSDtfsCounter, 1951 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1844 GetRequests, 1664 SyntacticMatches, 10 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=313occurred in iteration=17, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 78 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1151 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 1643 ConstructedInterpolants, 0 QuantifiedInterpolants, 7464 SizeOfPredicates, 38 NumberOfNonLiveVariables, 2192 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 7825/8866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 19:37:43,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf1b7da-1bee-488d-9cf5-b0e2c1df1d3a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE