./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh --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 1ab6b58208d0c243ef581620bcab9aae54e201e00d3505f3320b182de5e7ff75 --- 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-2329fc7 [2022-12-14 11:11:04,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:11:04,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:11:04,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:11:04,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:11:04,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:11:04,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:11:04,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:11:04,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:11:04,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:11:04,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:11:04,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:11:04,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:11:04,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:11:04,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:11:04,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:11:04,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:11:04,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:11:04,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:11:04,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:11:04,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:11:04,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:11:04,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:11:04,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:11:04,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:11:04,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:11:04,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:11:04,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:11:04,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:11:04,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:11:04,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:11:04,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:11:04,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:11:04,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:11:04,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:11:04,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:11:04,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:11:04,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:11:04,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:11:04,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:11:04,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:11:04,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:11:04,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:11:04,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:11:04,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:11:04,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:11:04,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:11:04,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:11:04,807 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:11:04,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:11:04,807 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:11:04,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:11:04,807 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:11:04,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:11:04,808 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:11:04,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:11:04,808 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:11:04,808 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:11:04,808 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:11:04,809 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:11:04,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:11:04,809 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:11:04,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:11:04,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:11:04,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:11:04,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:11:04,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:11:04,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:11:04,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:11:04,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:11:04,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:11:04,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:11:04,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:11:04,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:11:04,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:11:04,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:11:04,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:11:04,813 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_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab6b58208d0c243ef581620bcab9aae54e201e00d3505f3320b182de5e7ff75 [2022-12-14 11:11:04,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:11:05,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:11:05,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:11:05,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:11:05,018 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:11:05,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2022-12-14 11:11:07,577 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:11:07,734 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:11:07,734 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2022-12-14 11:11:07,738 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/data/69c0e90b5/52b32b31f8ce42ff8f6ec9f29b5dc617/FLAG202701146 [2022-12-14 11:11:08,150 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/data/69c0e90b5/52b32b31f8ce42ff8f6ec9f29b5dc617 [2022-12-14 11:11:08,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:11:08,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:11:08,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:11:08,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:11:08,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:11:08,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f1d886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08, skipping insertion in model container [2022-12-14 11:11:08,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:11:08,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:11:08,280 WARN L237 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_569c73dd-a4e0-431e-a406-dddd75d65d9a/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2022-12-14 11:11:08,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:11:08,305 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:11:08,317 WARN L237 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_569c73dd-a4e0-431e-a406-dddd75d65d9a/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2022-12-14 11:11:08,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:11:08,336 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:11:08,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08 WrapperNode [2022-12-14 11:11:08,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:11:08,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:11:08,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:11:08,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:11:08,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,365 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-12-14 11:11:08,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:11:08,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:11:08,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:11:08,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:11:08,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,383 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:11:08,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:11:08,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:11:08,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:11:08,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (1/1) ... [2022-12-14 11:11:08,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:11:08,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:08,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:11:08,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:11:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:11:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:11:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:11:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:11:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:11:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:11:08,503 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:11:08,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:11:08,622 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:11:08,649 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:11:08,650 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:11:08,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:11:08 BoogieIcfgContainer [2022-12-14 11:11:08,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:11:08,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:11:08,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:11:08,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:11:08,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:11:08" (1/3) ... [2022-12-14 11:11:08,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445aa531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:11:08, skipping insertion in model container [2022-12-14 11:11:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:11:08" (2/3) ... [2022-12-14 11:11:08,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445aa531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:11:08, skipping insertion in model container [2022-12-14 11:11:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:11:08" (3/3) ... [2022-12-14 11:11:08,660 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2022-12-14 11:11:08,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:11:08,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:11:08,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:11:08,721 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;@442d9397, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:11:08,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:11:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:11:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:11:08,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:08,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:08,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2022-12-14 11:11:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234595564] [2022-12-14 11:11:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:08,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:08,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234595564] [2022-12-14 11:11:08,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 11:11:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645393279] [2022-12-14 11:11:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:08,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:08,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:11:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 11:11:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:11:08,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:11:08,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645393279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:08,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:08,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:11:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761169631] [2022-12-14 11:11:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:11:08,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:11:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:11:08,965 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:08,990 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-12-14 11:11:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:11:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:11:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:09,000 INFO L225 Difference]: With dead ends: 43 [2022-12-14 11:11:09,000 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 11:11:09,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:11:09,005 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:09,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 11:11:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 11:11:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:11:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-12-14 11:11:09,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-12-14 11:11:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:09,032 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-12-14 11:11:09,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-12-14 11:11:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:11:09,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:09,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:09,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:11:09,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 11:11:09,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2022-12-14 11:11:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964668496] [2022-12-14 11:11:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:11:09,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964668496] [2022-12-14 11:11:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964668496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:09,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:09,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:11:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923468957] [2022-12-14 11:11:09,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:11:09,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:11:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:11:09,406 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:09,462 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-12-14 11:11:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:11:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:11:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:09,463 INFO L225 Difference]: With dead ends: 33 [2022-12-14 11:11:09,464 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 11:11:09,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:11:09,465 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:09,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 11:11:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-12-14 11:11:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:11:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-12-14 11:11:09,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2022-12-14 11:11:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:09,476 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-12-14 11:11:09,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-12-14 11:11:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:11:09,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:09,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:09,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:11:09,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2022-12-14 11:11:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460299954] [2022-12-14 11:11:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:09,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460299954] [2022-12-14 11:11:09,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 11:11:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723934493] [2022-12-14 11:11:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:09,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:09,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:09,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:11:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:11:09,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:11:09,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:11:09,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723934493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:09,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:09,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:11:09,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863368323] [2022-12-14 11:11:09,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:11:09,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:11:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:11:09,568 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:09,586 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-12-14 11:11:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:11:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 11:11:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:09,588 INFO L225 Difference]: With dead ends: 39 [2022-12-14 11:11:09,588 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 11:11:09,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:11:09,589 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:09,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 11:11:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 11:11:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:11:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-12-14 11:11:09,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2022-12-14 11:11:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:09,594 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-12-14 11:11:09,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-12-14 11:11:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:11:09,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:09,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:09,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:11:09,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:09,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2022-12-14 11:11:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120846276] [2022-12-14 11:11:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:11:09,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120846276] [2022-12-14 11:11:09,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120846276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:09,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:09,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:11:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958694122] [2022-12-14 11:11:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:11:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:11:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:11:09,954 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:11:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:09,996 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 11:11:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:11:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 11:11:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:09,997 INFO L225 Difference]: With dead ends: 39 [2022-12-14 11:11:09,997 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 11:11:09,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:11:09,998 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:09,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 11:11:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-12-14 11:11:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:11:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-12-14 11:11:10,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-12-14 11:11:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:10,003 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-12-14 11:11:10,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:11:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-12-14 11:11:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:11:10,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:10,003 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:10,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:11:10,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2022-12-14 11:11:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:10,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216891727] [2022-12-14 11:11:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:10,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:10,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:10,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521062185] [2022-12-14 11:11:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:10,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:10,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:11:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:11:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:11:10,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:11:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:11:10,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216891727] [2022-12-14 11:11:10,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:10,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521062185] [2022-12-14 11:11:10,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521062185] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:11:10,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773605316] [2022-12-14 11:11:10,291 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 11:11:10,292 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:11:10,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:11:10,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:11:10,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:11:10,591 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2022-12-14 11:11:10,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [773605316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:11,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:11:11,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-12-14 11:11:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987045322] [2022-12-14 11:11:11,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:11,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:11:11,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:11:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:11:11,115 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:11:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:11,254 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-14 11:11:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:11:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 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 [2022-12-14 11:11:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:11,255 INFO L225 Difference]: With dead ends: 49 [2022-12-14 11:11:11,255 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 11:11:11,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:11:11,256 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:11,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:11:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 11:11:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 11:11:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:11:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-14 11:11:11,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2022-12-14 11:11:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:11,268 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-14 11:11:11,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:11:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-14 11:11:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:11:11,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:11,269 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:11,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:11:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:11,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2022-12-14 11:11:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698704743] [2022-12-14 11:11:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:11,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:11,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922582858] [2022-12-14 11:11:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:11,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:11,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:11,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:11:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:11,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:11:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:11:11,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:11:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:11:11,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698704743] [2022-12-14 11:11:11,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922582858] [2022-12-14 11:11:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922582858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:11:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988831690] [2022-12-14 11:11:11,785 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:11:11,785 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:11:11,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:11:11,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:11:11,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:11:12,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2022-12-14 11:11:12,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:13,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [988831690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:13,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:11:13,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 19 [2022-12-14 11:11:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175899407] [2022-12-14 11:11:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:11:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:11:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:11:13,013 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:13,214 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-12-14 11:11:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:11:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 11:11:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:13,216 INFO L225 Difference]: With dead ends: 70 [2022-12-14 11:11:13,216 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 11:11:13,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:11:13,218 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:13,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:11:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 11:11:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 11:11:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:11:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-12-14 11:11:13,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 25 [2022-12-14 11:11:13,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:13,224 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-12-14 11:11:13,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-12-14 11:11:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:11:13,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:13,225 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:13,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:11:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:13,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2127759890, now seen corresponding path program 1 times [2022-12-14 11:11:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:13,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980596016] [2022-12-14 11:11:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:13,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:13,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308608459] [2022-12-14 11:11:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:13,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:13,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:13,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:11:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:11:13,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:11:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:11:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:11:13,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980596016] [2022-12-14 11:11:13,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308608459] [2022-12-14 11:11:13,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308608459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:11:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518493277] [2022-12-14 11:11:13,547 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:11:13,547 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:11:13,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:11:13,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:11:13,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:11:16,397 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2022-12-14 11:11:16,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1518493277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:17,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:11:17,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 5] total 12 [2022-12-14 11:11:17,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192474892] [2022-12-14 11:11:17,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:17,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:11:17,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:11:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:11:17,024 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:17,119 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-12-14 11:11:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:11:17,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-12-14 11:11:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:17,120 INFO L225 Difference]: With dead ends: 66 [2022-12-14 11:11:17,120 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 11:11:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 12 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:11:17,120 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:17,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 62 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:11:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 11:11:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-12-14 11:11:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:11:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-12-14 11:11:17,128 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2022-12-14 11:11:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:17,128 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-12-14 11:11:17,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-12-14 11:11:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:11:17,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:17,129 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:17,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:11:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:17,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2126032012, now seen corresponding path program 1 times [2022-12-14 11:11:17,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895086870] [2022-12-14 11:11:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:17,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118328165] [2022-12-14 11:11:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:17,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:17,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:11:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:17,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:11:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:11:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:11:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:11:17,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895086870] [2022-12-14 11:11:17,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118328165] [2022-12-14 11:11:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118328165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:11:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571352613] [2022-12-14 11:11:17,442 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:11:17,442 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:11:17,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:11:17,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:11:17,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:11:20,049 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-12-14 11:11:20,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:20,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1532#(and (<= ~counter~0 4) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:11:20,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:11:20,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:11:20,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-12-14 11:11:20,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222082731] [2022-12-14 11:11:20,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:11:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:11:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:11:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:11:20,712 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 11:11:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:20,739 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-14 11:11:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:11:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 27 [2022-12-14 11:11:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:20,740 INFO L225 Difference]: With dead ends: 64 [2022-12-14 11:11:20,740 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 11:11:20,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:11:20,740 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:20,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 11:11:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 11:11:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:11:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-12-14 11:11:20,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 27 [2022-12-14 11:11:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:20,748 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-12-14 11:11:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 11:11:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-12-14 11:11:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:11:20,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:20,749 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:20,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:11:20,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:20,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 387112662, now seen corresponding path program 1 times [2022-12-14 11:11:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:20,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337404846] [2022-12-14 11:11:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:20,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:20,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601229683] [2022-12-14 11:11:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:20,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:20,975 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:11:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:21,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:11:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 11:11:21,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:11:21,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337404846] [2022-12-14 11:11:21,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601229683] [2022-12-14 11:11:21,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601229683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:21,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:21,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:11:21,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388682577] [2022-12-14 11:11:21,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:21,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:11:21,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:11:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:11:21,073 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 11:11:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:21,101 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-14 11:11:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:11:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-12-14 11:11:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:21,102 INFO L225 Difference]: With dead ends: 64 [2022-12-14 11:11:21,102 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 11:11:21,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:11:21,103 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:21,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 11:11:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-12-14 11:11:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:11:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-12-14 11:11:21,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2022-12-14 11:11:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:21,113 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-12-14 11:11:21,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 11:11:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-12-14 11:11:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:11:21,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:21,114 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:21,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:11:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:21,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash 385384784, now seen corresponding path program 1 times [2022-12-14 11:11:21,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:21,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305929507] [2022-12-14 11:11:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:21,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:21,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737250030] [2022-12-14 11:11:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:21,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:21,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:11:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:11:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 11:11:21,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:11:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 11:11:21,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305929507] [2022-12-14 11:11:21,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737250030] [2022-12-14 11:11:21,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737250030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:11:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500846822] [2022-12-14 11:11:21,554 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:11:21,554 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:11:21,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:11:21,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:11:21,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:11:23,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 11:11:23,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [500846822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:25,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:11:25,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 18 [2022-12-14 11:11:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287020494] [2022-12-14 11:11:25,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:11:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:11:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:11:25,291 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:25,409 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-12-14 11:11:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:11:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-12-14 11:11:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:25,410 INFO L225 Difference]: With dead ends: 59 [2022-12-14 11:11:25,410 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 11:11:25,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 19 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:11:25,411 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:25,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:11:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 11:11:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-12-14 11:11:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:11:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-12-14 11:11:25,419 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 43 [2022-12-14 11:11:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:25,420 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-12-14 11:11:25,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-12-14 11:11:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 11:11:25,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:25,420 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:25,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:11:25,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:11:25,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash -824407563, now seen corresponding path program 2 times [2022-12-14 11:11:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963532515] [2022-12-14 11:11:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:25,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329127894] [2022-12-14 11:11:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:11:25,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:25,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:25,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:25,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:11:25,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 11:11:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:11:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:11:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 11:11:25,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:11:25,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963532515] [2022-12-14 11:11:25,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:11:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329127894] [2022-12-14 11:11:25,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329127894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:11:25,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:11:25,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:11:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445484924] [2022-12-14 11:11:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:11:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:11:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:11:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:11:25,712 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:25,743 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-12-14 11:11:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:11:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-14 11:11:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:25,745 INFO L225 Difference]: With dead ends: 62 [2022-12-14 11:11:25,746 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 11:11:25,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:11:25,746 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:25,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:11:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 11:11:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-12-14 11:11:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:11:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-12-14 11:11:25,754 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2022-12-14 11:11:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:25,754 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-12-14 11:11:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:11:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-12-14 11:11:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 11:11:25,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:25,755 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:25,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:11:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:25,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:11:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2022-12-14 11:11:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143530427] [2022-12-14 11:11:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:25,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:11:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254155409] [2022-12-14 11:11:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:25,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:25,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:25,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:11:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:11:26,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:11:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:11:26,064 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:11:26,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:11:26,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 11:11:26,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 11:11:26,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:26,271 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:26,275 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:11:26,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:11:26 BoogieIcfgContainer [2022-12-14 11:11:26,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:11:26,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:11:26,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:11:26,320 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:11:26,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:11:08" (3/4) ... [2022-12-14 11:11:26,322 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 11:11:26,353 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 11:11:26,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:11:26,354 INFO L158 Benchmark]: Toolchain (without parser) took 18200.32ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 102.0MB in the beginning and 241.6MB in the end (delta: -139.6MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2022-12-14 11:11:26,354 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 136.3MB. Free memory is still 102.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:11:26,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.81ms. Allocated memory is still 136.3MB. Free memory was 102.0MB in the beginning and 91.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:11:26,355 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.56ms. Allocated memory is still 136.3MB. Free memory was 91.4MB in the beginning and 89.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:11:26,355 INFO L158 Benchmark]: Boogie Preprocessor took 19.16ms. Allocated memory is still 136.3MB. Free memory was 89.7MB in the beginning and 88.8MB in the end (delta: 984.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:11:26,355 INFO L158 Benchmark]: RCFGBuilder took 266.72ms. Allocated memory is still 136.3MB. Free memory was 88.4MB in the beginning and 76.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 11:11:26,355 INFO L158 Benchmark]: TraceAbstraction took 17664.73ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 75.4MB in the beginning and 243.7MB in the end (delta: -168.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:11:26,356 INFO L158 Benchmark]: Witness Printer took 33.69ms. Allocated memory is still 285.2MB. Free memory was 243.7MB in the beginning and 241.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:11:26,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 136.3MB. Free memory is still 102.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.81ms. Allocated memory is still 136.3MB. Free memory was 102.0MB in the beginning and 91.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.56ms. Allocated memory is still 136.3MB. Free memory was 91.4MB in the beginning and 89.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.16ms. Allocated memory is still 136.3MB. Free memory was 89.7MB in the beginning and 88.8MB in the end (delta: 984.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.72ms. Allocated memory is still 136.3MB. Free memory was 88.4MB in the beginning and 76.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 17664.73ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 75.4MB in the beginning and 243.7MB in the end (delta: -168.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 33.69ms. Allocated memory is still 285.2MB. Free memory was 243.7MB in the beginning and 241.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.6s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 724 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 480 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 667 IncrementalHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 244 mSDtfsCounter, 667 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 378 SyntacticMatches, 52 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=10, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 326 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 385 ConstructedInterpolants, 0 QuantifiedInterpolants, 1224 SizeOfPredicates, 13 NumberOfNonLiveVariables, 903 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 388/450 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 5.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 84, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 65, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 60, TOOLS_POST_CALL_TIME: 3.9s, TOOLS_POST_RETURN_APPLICATIONS: 46, TOOLS_POST_RETURN_TIME: 0.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 171, TOOLS_QUANTIFIERELIM_TIME: 4.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 206, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 71, DOMAIN_JOIN_TIME: 0.7s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 84, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 2.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 46, CALL_SUMMARIZER_CACHE_MISSES: 4, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 665, DAG_COMPRESSION_RETAINED_NODES: 198, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 11:11:26,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_569c73dd-a4e0-431e-a406-dddd75d65d9a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE