./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:57:17,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:17,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:17,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:17,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:17,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:17,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:17,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:17,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:17,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:17,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:17,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:17,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:17,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:17,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:17,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:17,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:17,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:17,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:17,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:17,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:17,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:17,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:17,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:17,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:17,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:17,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:17,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:17,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:17,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:17,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:17,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:17,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:17,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:17,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:17,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:17,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:17,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:17,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:17,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:17,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:17,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:57:17,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:17,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:17,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:17,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:17,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:17,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:17,769 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:17,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:17,770 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:17,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:57:17,771 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:17,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:17,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:57:17,772 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:57:17,772 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:17,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:57:17,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:57:17,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:57:17,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:17,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:57:17,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:57:17,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:57:17,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:17,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:17,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:17,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:17,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:57:17,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:17,779 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:17,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:17,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:17,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:17,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:17,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:17,781 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:57:17,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:17,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:17,782 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:57:17,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:57:17,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:17,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:17,783 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_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb [2022-11-03 01:57:18,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:18,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:18,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:18,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:18,186 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:18,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2022-11-03 01:57:18,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/data/f671d187e/feb48e7483a848a5b60aa9791adcd02d/FLAG3484913b0 [2022-11-03 01:57:18,779 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:18,780 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2022-11-03 01:57:18,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/data/f671d187e/feb48e7483a848a5b60aa9791adcd02d/FLAG3484913b0 [2022-11-03 01:57:19,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/data/f671d187e/feb48e7483a848a5b60aa9791adcd02d [2022-11-03 01:57:19,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:19,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:19,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:19,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:19,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:19,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518aad8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19, skipping insertion in model container [2022-11-03 01:57:19,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:19,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:19,398 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_5c19dd76-4702-4f72-a437-4c93a580526c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-11-03 01:57:19,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:19,425 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:19,441 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_5c19dd76-4702-4f72-a437-4c93a580526c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-11-03 01:57:19,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:19,464 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:19,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19 WrapperNode [2022-11-03 01:57:19,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:19,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:19,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:19,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:19,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,499 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-03 01:57:19,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:19,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:19,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:19,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:19,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:19,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:19,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:19,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:19,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:19,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:19,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:57:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:57:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:57:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:57:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:57:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:57:19,664 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:19,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:19,791 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:57:19,824 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:57:19,824 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:57:19,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:19 BoogieIcfgContainer [2022-11-03 01:57:19,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:57:19,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:57:19,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:57:19,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:57:19,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:19" (1/3) ... [2022-11-03 01:57:19,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c3296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:19, skipping insertion in model container [2022-11-03 01:57:19,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19" (2/3) ... [2022-11-03 01:57:19,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c3296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:19, skipping insertion in model container [2022-11-03 01:57:19,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:19" (3/3) ... [2022-11-03 01:57:19,838 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2022-11-03 01:57:19,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:57:19,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:57:19,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:57:19,917 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3eb2d3d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:57:19,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:57:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:57:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:57:19,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:19,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:19,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2022-11-03 01:57:19,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:19,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766368420] [2022-11-03 01:57:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:20,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766368420] [2022-11-03 01:57:20,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:57:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870402725] [2022-11-03 01:57:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:20,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:57:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:57:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:20,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870402725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:20,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:20,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905750551] [2022-11-03 01:57:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:20,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:57:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:57:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:57:20,320 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,354 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-03 01:57:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:57:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-03 01:57:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:20,367 INFO L225 Difference]: With dead ends: 35 [2022-11-03 01:57:20,367 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:57:20,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:57:20,386 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:20,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:57:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 01:57:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:57:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-03 01:57:20,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2022-11-03 01:57:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:20,451 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-03 01:57:20,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-03 01:57:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:57:20,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:20,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:20,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:20,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:57:20,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2022-11-03 01:57:20,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:20,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380407877] [2022-11-03 01:57:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380407877] [2022-11-03 01:57:20,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:57:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878341004] [2022-11-03 01:57:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:20,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:57:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:20,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878341004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:20,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515094158] [2022-11-03 01:57:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:20,935 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,969 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-03 01:57:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:20,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-03 01:57:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:20,971 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:57:20,972 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:57:20,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:20,974 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:20,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:57:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-03 01:57:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:57:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-03 01:57:20,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-03 01:57:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:20,983 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-03 01:57:20,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-03 01:57:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:20,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:20,985 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:21,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:21,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:21,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2022-11-03 01:57:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681740083] [2022-11-03 01:57:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:21,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:21,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66562421] [2022-11-03 01:57:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:21,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:21,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:21,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:57:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:21,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:57:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:57:21,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:22,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:22,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681740083] [2022-11-03 01:57:22,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66562421] [2022-11-03 01:57:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66562421] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:22,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:22,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:57:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689886428] [2022-11-03 01:57:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:22,031 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:24,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:26,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:26,484 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-03 01:57:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-03 01:57:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:26,666 INFO L225 Difference]: With dead ends: 34 [2022-11-03 01:57:26,667 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:57:26,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:26,669 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:26,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 75 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 01:57:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:57:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-03 01:57:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:57:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-03 01:57:26,693 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-11-03 01:57:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:26,694 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-03 01:57:26,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-03 01:57:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:57:26,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:26,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:26,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:26,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:26,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2022-11-03 01:57:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567485223] [2022-11-03 01:57:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:26,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737597749] [2022-11-03 01:57:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:26,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:26,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:26,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:57:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:27,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:27,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567485223] [2022-11-03 01:57:27,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737597749] [2022-11-03 01:57:27,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737597749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:27,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067800683] [2022-11-03 01:57:27,247 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 01:57:27,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:27,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:27,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:27,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:27,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-03 01:57:28,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:28,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2067800683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:28,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:28,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 5] total 18 [2022-11-03 01:57:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719467485] [2022-11-03 01:57:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:57:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:57:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:57:28,970 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:57:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:29,277 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-11-03 01:57:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:57:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-03 01:57:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:29,279 INFO L225 Difference]: With dead ends: 50 [2022-11-03 01:57:29,279 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 01:57:29,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:57:29,280 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:29,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 57 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-11-03 01:57:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 01:57:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-03 01:57:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:57:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-03 01:57:29,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2022-11-03 01:57:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:29,291 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-03 01:57:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:57:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-03 01:57:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:57:29,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:29,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:29,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:29,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1736210901, now seen corresponding path program 1 times [2022-11-03 01:57:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:29,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534597039] [2022-11-03 01:57:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:29,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:29,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718470295] [2022-11-03 01:57:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:29,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:29,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:57:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:29,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:29,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534597039] [2022-11-03 01:57:29,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718470295] [2022-11-03 01:57:29,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718470295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327565529] [2022-11-03 01:57:29,747 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 01:57:29,747 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:29,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:29,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:29,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:30,072 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-03 01:57:30,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-03 01:57:30,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:31,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '828#(and (<= 11 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:31,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:31,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:31,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-03 01:57:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253659013] [2022-11-03 01:57:31,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:31,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:31,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:57:31,826 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:32,031 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-11-03 01:57:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:57:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-03 01:57:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:32,033 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:57:32,033 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 01:57:32,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:57:32,035 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:32,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 01:57:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-11-03 01:57:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:57:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-03 01:57:32,047 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 19 [2022-11-03 01:57:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:32,047 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-03 01:57:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-03 01:57:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:57:32,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:32,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:32,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:32,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:32,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2022-11-03 01:57:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816515501] [2022-11-03 01:57:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:32,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:32,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:32,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034122382] [2022-11-03 01:57:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:32,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:32,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:32,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:57:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:32,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:57:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:57:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:33,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816515501] [2022-11-03 01:57:33,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034122382] [2022-11-03 01:57:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034122382] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:33,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:33,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:57:33,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289646389] [2022-11-03 01:57:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:33,061 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:33,151 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-03 01:57:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-03 01:57:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:33,155 INFO L225 Difference]: With dead ends: 51 [2022-11-03 01:57:33,155 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 01:57:33,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:33,157 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:33,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-03 01:57:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 01:57:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-03 01:57:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:57:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-03 01:57:33,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 20 [2022-11-03 01:57:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:33,178 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-03 01:57:33,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:57:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-03 01:57:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:57:33,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:33,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:33,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:57:33,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1946272323, now seen corresponding path program 1 times [2022-11-03 01:57:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329569788] [2022-11-03 01:57:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:33,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:33,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614187949] [2022-11-03 01:57:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:33,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:33,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:33,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:33,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:57:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:33,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:33,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329569788] [2022-11-03 01:57:33,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614187949] [2022-11-03 01:57:33,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614187949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717879019] [2022-11-03 01:57:33,700 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 01:57:33,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:33,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:33,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:33,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:34,041 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-03 01:57:34,076 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-03 01:57:34,109 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:36,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1378#(and (<= 11 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:36,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:36,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:36,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-03 01:57:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482701902] [2022-11-03 01:57:36,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:57:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:57:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:57:36,067 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:36,365 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2022-11-03 01:57:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:57:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-03 01:57:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:36,373 INFO L225 Difference]: With dead ends: 120 [2022-11-03 01:57:36,373 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 01:57:36,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:57:36,375 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:36,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 108 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 01:57:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2022-11-03 01:57:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 86 states have internal predecessors, (95), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:57:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2022-11-03 01:57:36,397 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 20 [2022-11-03 01:57:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:36,398 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2022-11-03 01:57:36,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2022-11-03 01:57:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:57:36,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:36,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:36,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:57:36,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1825805005, now seen corresponding path program 1 times [2022-11-03 01:57:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736120034] [2022-11-03 01:57:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:36,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827550008] [2022-11-03 01:57:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:36,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:36,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:36,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:57:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:36,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:36,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736120034] [2022-11-03 01:57:36,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827550008] [2022-11-03 01:57:36,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827550008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:36,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473024652] [2022-11-03 01:57:36,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:36,727 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:57:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:36,786 INFO L93 Difference]: Finished difference Result 141 states and 165 transitions. [2022-11-03 01:57:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-03 01:57:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:36,791 INFO L225 Difference]: With dead ends: 141 [2022-11-03 01:57:36,791 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 01:57:36,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:36,793 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:36,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 01:57:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-03 01:57:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:57:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-03 01:57:36,819 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 25 [2022-11-03 01:57:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:36,819 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-03 01:57:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:57:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-03 01:57:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:57:36,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:36,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:36,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:37,047 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash -687200305, now seen corresponding path program 1 times [2022-11-03 01:57:37,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:37,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699530668] [2022-11-03 01:57:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:37,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:37,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38915799] [2022-11-03 01:57:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:37,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:37,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:37,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:57:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:37,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:57:37,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:57:37,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:37,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699530668] [2022-11-03 01:57:37,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:37,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38915799] [2022-11-03 01:57:37,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38915799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:37,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521414926] [2022-11-03 01:57:37,375 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:57:37,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:37,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:37,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:37,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:37,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-03 01:57:37,823 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-03 01:57:37,852 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:40,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2276#(and (<= 2 ~counter~0) (< ~counter~0 11) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:40,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:40,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:40,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-03 01:57:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722276424] [2022-11-03 01:57:40,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:40,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:57:40,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:57:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:57:40,170 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:42,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:44,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:46,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:48,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:50,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:51,179 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-11-03 01:57:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-03 01:57:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:51,181 INFO L225 Difference]: With dead ends: 106 [2022-11-03 01:57:51,181 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 01:57:51,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:57:51,183 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:51,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 4 Unknown, 0 Unchecked, 10.9s Time] [2022-11-03 01:57:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 01:57:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-03 01:57:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.164179104477612) internal successors, (78), 71 states have internal predecessors, (78), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:57:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-11-03 01:57:51,199 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 26 [2022-11-03 01:57:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:51,200 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-11-03 01:57:51,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-11-03 01:57:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:57:51,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:51,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:51,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:51,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:51,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -810539866, now seen corresponding path program 1 times [2022-11-03 01:57:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867684978] [2022-11-03 01:57:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:51,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695137912] [2022-11-03 01:57:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:51,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:51,447 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:51,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c19dd76-4702-4f72-a437-4c93a580526c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process