./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/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 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e --- 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 11:02:19,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:02:19,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:02:19,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:02:19,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:02:19,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:02:19,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:02:19,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:02:19,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:02:19,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:02:19,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:02:19,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:02:19,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:02:19,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:02:19,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:02:19,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:02:19,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:02:19,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:02:19,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:02:19,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:02:19,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:02:19,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:02:19,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:02:19,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:02:19,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:02:19,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:02:19,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:02:19,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:02:19,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:02:19,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:02:19,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:02:19,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:02:19,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:02:19,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:02:19,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:02:19,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:02:19,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:02:19,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:02:19,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:02:19,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:02:19,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:02:19,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:02:19,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:02:19,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:02:19,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:02:19,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:02:19,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:02:19,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:02:19,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:02:19,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:02:19,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:02:19,820 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:02:19,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:02:19,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:02:19,820 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:02:19,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:02:19,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:02:19,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:02:19,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:02:19,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:02:19,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:02:19,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:02:19,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:02:19,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:02:19,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:02:19,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:02:19,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:02:19,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:02:19,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:02:19,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:02:19,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:02:19,824 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:02:19,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:02:19,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:02:19,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:02:19,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:02:19,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:02:19,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:02:19,825 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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e [2022-12-14 11:02:20,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:02:20,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:02:20,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:02:20,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:02:20,042 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:02:20,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-12-14 11:02:22,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:02:22,706 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:02:22,706 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-12-14 11:02:22,713 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/data/c11dd562f/6404f10b7dc240f996d1ac0c544a30eb/FLAG9973701eb [2022-12-14 11:02:22,722 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/data/c11dd562f/6404f10b7dc240f996d1ac0c544a30eb [2022-12-14 11:02:22,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:02:22,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:02:22,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:02:22,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:02:22,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:02:22,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:02:22" (1/1) ... [2022-12-14 11:02:22,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4991c9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:22, skipping insertion in model container [2022-12-14 11:02:22,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:02:22" (1/1) ... [2022-12-14 11:02:22,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:02:22,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:02:22,935 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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-12-14 11:02:22,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:02:22,951 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:02:22,987 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_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-12-14 11:02:22,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:02:23,003 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:02:23,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23 WrapperNode [2022-12-14 11:02:23,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:02:23,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:02:23,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:02:23,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:02:23,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,039 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 548 [2022-12-14 11:02:23,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:02:23,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:02:23,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:02:23,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:02:23,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:02:23,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:02:23,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:02:23,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:02:23,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (1/1) ... [2022-12-14 11:02:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:02:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:23,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:02:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:02:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:02:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:02:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:02:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:02:23,212 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:02:23,213 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:02:23,489 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:02:23,513 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:02:23,513 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 11:02:23,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:02:23 BoogieIcfgContainer [2022-12-14 11:02:23,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:02:23,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:02:23,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:02:23,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:02:23,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:02:22" (1/3) ... [2022-12-14 11:02:23,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262c4511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:02:23, skipping insertion in model container [2022-12-14 11:02:23,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:02:23" (2/3) ... [2022-12-14 11:02:23,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262c4511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:02:23, skipping insertion in model container [2022-12-14 11:02:23,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:02:23" (3/3) ... [2022-12-14 11:02:23,525 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2022-12-14 11:02:23,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:02:23,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:02:23,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:02:23,589 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;@188c2a94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:02:23,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:02:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:02:23,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:23,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:23,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1601611879, now seen corresponding path program 1 times [2022-12-14 11:02:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988730636] [2022-12-14 11:02:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:23,926 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 11:02:23,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988730636] [2022-12-14 11:02:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988730636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:02:23,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:02:23,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:02:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560995722] [2022-12-14 11:02:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:02:23,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:02:23,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:02:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:02:23,967 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:24,048 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2022-12-14 11:02:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:02:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 11:02:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:24,058 INFO L225 Difference]: With dead ends: 64 [2022-12-14 11:02:24,058 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 11:02:24,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:02:24,064 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 93 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:24,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:02:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 11:02:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 11:02:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-12-14 11:02:24,090 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2022-12-14 11:02:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:24,091 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-12-14 11:02:24,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-12-14 11:02:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:02:24,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:24,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:02:24,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1584601218, now seen corresponding path program 1 times [2022-12-14 11:02:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:24,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543593960] [2022-12-14 11:02:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:24,356 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 11:02:24,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543593960] [2022-12-14 11:02:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543593960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:02:24,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:02:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 11:02:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604908253] [2022-12-14 11:02:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:02:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:02:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:02:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:02:24,360 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:24,412 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-12-14 11:02:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:02:24,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 11:02:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:24,413 INFO L225 Difference]: With dead ends: 63 [2022-12-14 11:02:24,413 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 11:02:24,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:02:24,415 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:24,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 114 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:02:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 11:02:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-12-14 11:02:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-12-14 11:02:24,422 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2022-12-14 11:02:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:24,422 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-12-14 11:02:24,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-12-14 11:02:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:02:24,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:24,424 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:02:24,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 902581852, now seen corresponding path program 1 times [2022-12-14 11:02:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925888872] [2022-12-14 11:02:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:24,487 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 11:02:24,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925888872] [2022-12-14 11:02:24,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925888872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:02:24,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:02:24,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:02:24,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522932449] [2022-12-14 11:02:24,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:02:24,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:02:24,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:02:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:02:24,490 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:24,501 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-12-14 11:02:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:02:24,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 11:02:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:24,502 INFO L225 Difference]: With dead ends: 66 [2022-12-14 11:02:24,502 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 11:02:24,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:02:24,504 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:24,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:02:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 11:02:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 11:02:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-12-14 11:02:24,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-12-14 11:02:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:24,509 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-12-14 11:02:24,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-12-14 11:02:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:02:24,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:24,511 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:24,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:02:24,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash 449992577, now seen corresponding path program 1 times [2022-12-14 11:02:24,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:24,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236487826] [2022-12-14 11:02:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:24,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236487826] [2022-12-14 11:02:24,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236487826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529557493] [2022-12-14 11:02:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:24,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:24,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:02:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:02:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:25,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529557493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255301903] [2022-12-14 11:02:25,128 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:02:25,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:25,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:25,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:25,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:27,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:35,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '789#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~__tmp_4~0#1| (/ 1.0 4.0)) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (<= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= 0.0 |ULTIMATE.start_main_~__tmp_2~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1|) (<= 0 ~__return_main~0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0 |#NULL.offset|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:35,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:35,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:35,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 11:02:35,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743435790] [2022-12-14 11:02:35,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:35,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:02:35,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:02:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=2440, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:02:35,749 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:35,829 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-12-14 11:02:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:02:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 11:02:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:35,830 INFO L225 Difference]: With dead ends: 118 [2022-12-14 11:02:35,830 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 11:02:35,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=866, Invalid=2440, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:02:35,832 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:35,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 127 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:02:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 11:02:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-12-14 11:02:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-12-14 11:02:35,838 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49 [2022-12-14 11:02:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:35,838 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-12-14 11:02:35,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-12-14 11:02:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 11:02:35,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:35,839 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:35,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:02:36,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:36,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash -844379071, now seen corresponding path program 2 times [2022-12-14 11:02:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710486635] [2022-12-14 11:02:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:36,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710486635] [2022-12-14 11:02:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710486635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038994259] [2022-12-14 11:02:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:02:36,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:36,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:36,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:02:36,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-14 11:02:36,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:02:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:02:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:36,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:37,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038994259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332635398] [2022-12-14 11:02:37,412 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:02:37,412 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:37,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:37,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:37,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:40,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:51,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1808#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:51,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:51,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:51,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 11:02:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348630606] [2022-12-14 11:02:51,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:51,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 11:02:51,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 11:02:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2357, Invalid=4285, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 11:02:51,423 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:51,565 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-12-14 11:02:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 11:02:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-14 11:02:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:51,567 INFO L225 Difference]: With dead ends: 238 [2022-12-14 11:02:51,567 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 11:02:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3553 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=2357, Invalid=4285, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 11:02:51,569 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:51,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 218 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:02:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 11:02:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-12-14 11:02:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-12-14 11:02:51,579 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109 [2022-12-14 11:02:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:51,579 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-12-14 11:02:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-12-14 11:02:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-14 11:02:51,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:51,582 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:51,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:02:51,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:51,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:02:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash -588917311, now seen corresponding path program 3 times [2022-12-14 11:02:51,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:51,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743584387] [2022-12-14 11:02:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:51,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:53,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743584387] [2022-12-14 11:02:53,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743584387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315315470] [2022-12-14 11:02:53,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:02:53,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:53,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:53,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:53,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:02:53,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:02:53,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:02:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 11:02:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:53,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:55,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315315470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:55,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744056384] [2022-12-14 11:02:55,604 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:02:55,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:55,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:55,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:55,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:57,670 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:03:05,637 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3931#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~__tmp_4~0#1| (/ 1.0 4.0)) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (<= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= 0.0 |ULTIMATE.start_main_~__tmp_2~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1|) (<= 0 ~__return_main~0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0 |#NULL.offset|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:03:05,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:03:05,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:03:05,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-12-14 11:03:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895859580] [2022-12-14 11:03:05,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:03:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 11:03:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 11:03:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7094, Invalid=9676, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 11:03:05,642 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:06,061 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2022-12-14 11:03:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 11:03:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-12-14 11:03:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:06,067 INFO L225 Difference]: With dead ends: 478 [2022-12-14 11:03:06,068 INFO L226 Difference]: Without dead ends: 471 [2022-12-14 11:03:06,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6723 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=7094, Invalid=9676, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 11:03:06,071 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:06,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 387 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:03:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-12-14 11:03:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-12-14 11:03:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2022-12-14 11:03:06,099 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229 [2022-12-14 11:03:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:06,099 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2022-12-14 11:03:06,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2022-12-14 11:03:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-12-14 11:03:06,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:06,109 INFO L195 NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:03:06,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:03:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:03:06,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1162450751, now seen corresponding path program 4 times [2022-12-14 11:03:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:06,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243075325] [2022-12-14 11:03:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:03:11,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243075325] [2022-12-14 11:03:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243075325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:03:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341719313] [2022-12-14 11:03:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:03:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:11,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:11,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:03:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 4034 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 11:03:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:03:12,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:03:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:03:18,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341719313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:03:18,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703946882] [2022-12-14 11:03:18,834 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:03:18,834 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:03:18,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:03:18,834 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:03:18,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:03:20,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:03:29,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8262#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~__tmp_4~0#1| (/ 1.0 4.0)) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (<= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= 0.0 |ULTIMATE.start_main_~__tmp_2~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1|) (<= 0 ~__return_main~0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0 |#NULL.offset|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:03:29,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:03:29,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:03:29,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 11:03:29,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558045726] [2022-12-14 11:03:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:03:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 11:03:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 11:03:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23462, Invalid=27388, Unknown=0, NotChecked=0, Total=50850 [2022-12-14 11:03:29,889 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:31,364 INFO L93 Difference]: Finished difference Result 958 states and 1055 transitions. [2022-12-14 11:03:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 11:03:31,365 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-12-14 11:03:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:31,367 INFO L225 Difference]: With dead ends: 958 [2022-12-14 11:03:31,367 INFO L226 Difference]: Without dead ends: 951 [2022-12-14 11:03:31,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1276 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13059 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=23462, Invalid=27388, Unknown=0, NotChecked=0, Total=50850 [2022-12-14 11:03:31,370 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:31,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 637 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:03:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-12-14 11:03:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2022-12-14 11:03:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions. [2022-12-14 11:03:31,392 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469 [2022-12-14 11:03:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:31,392 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 952 transitions. [2022-12-14 11:03:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions. [2022-12-14 11:03:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2022-12-14 11:03:31,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:31,412 INFO L195 NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:03:31,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:03:31,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:03:31,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:31,615 INFO L85 PathProgramCache]: Analyzing trace with hash -37122367, now seen corresponding path program 5 times [2022-12-14 11:03:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902262864] [2022-12-14 11:03:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:31,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:03:57,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:57,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902262864] [2022-12-14 11:03:57,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902262864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:03:57,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101911296] [2022-12-14 11:03:57,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:03:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:57,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:57,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:04:00,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s) [2022-12-14 11:04:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:04:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 8066 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 11:04:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:04:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:04:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:04:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:04:27,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101911296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:04:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290012616] [2022-12-14 11:04:27,034 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:04:27,034 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:04:27,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:04:27,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:04:27,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:04:29,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:04:38,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17009#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~__tmp_4~0#1| (/ 1.0 4.0)) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (<= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= 0.0 |ULTIMATE.start_main_~__tmp_2~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1|) (<= 0 ~__return_main~0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0 |#NULL.offset|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:04:38,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:04:38,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:04:38,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 11:04:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139139008] [2022-12-14 11:04:38,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:04:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 11:04:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:04:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 11:04:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83846, Invalid=90460, Unknown=0, NotChecked=0, Total=174306 [2022-12-14 11:04:38,803 INFO L87 Difference]: Start difference. First operand 951 states and 952 transitions. Second operand has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:04:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:04:49,440 INFO L93 Difference]: Finished difference Result 1918 states and 2111 transitions. [2022-12-14 11:04:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 11:04:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 949 [2022-12-14 11:04:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:04:49,445 INFO L225 Difference]: With dead ends: 1918 [2022-12-14 11:04:49,445 INFO L226 Difference]: Without dead ends: 1911 [2022-12-14 11:04:49,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2620 SyntacticMatches, 1 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25731 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=83846, Invalid=90460, Unknown=0, NotChecked=0, Total=174306 [2022-12-14 11:04:49,453 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:04:49,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1199 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:04:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-12-14 11:04:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911. [2022-12-14 11:04:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:04:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions. [2022-12-14 11:04:49,504 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949 [2022-12-14 11:04:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:04:49,506 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions. [2022-12-14 11:04:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:04:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions. [2022-12-14 11:04:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1910 [2022-12-14 11:04:49,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:49,535 INFO L195 NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:04:49,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:04:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:49,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash -239609151, now seen corresponding path program 6 times [2022-12-14 11:04:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:04:49,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836909619] [2022-12-14 11:04:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:49,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:04:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:07:22,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836909619] [2022-12-14 11:07:22,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836909619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476559220] [2022-12-14 11:07:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:07:22,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:22,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:22,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:22,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:07:24,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:07:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:07:24,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 16130 conjuncts, 384 conjunts are in the unsatisfiable core [2022-12-14 11:07:24,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:07:26,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:20,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476559220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:20,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968818847] [2022-12-14 11:09:20,350 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 11:09:20,350 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:09:20,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:09:20,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:09:20,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:09:23,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:40,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34588#(and (<= ~__tmp_120439_1~0 1) (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 1 ~__tmp_120439_1~0) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:40,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:40,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:40,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-12-14 11:09:40,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503587711] [2022-12-14 11:09:40,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-12-14 11:09:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-12-14 11:09:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315197, Invalid=327205, Unknown=0, NotChecked=0, Total=642402 [2022-12-14 11:09:40,763 INFO L87 Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:54,308 INFO L93 Difference]: Finished difference Result 3838 states and 4223 transitions. [2022-12-14 11:10:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-12-14 11:10:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1909 [2022-12-14 11:10:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:54,317 INFO L225 Difference]: With dead ends: 3838 [2022-12-14 11:10:54,317 INFO L226 Difference]: Without dead ends: 3831 [2022-12-14 11:10:54,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5308 SyntacticMatches, 1 SemanticMatches, 800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51073 ImplicationChecksByTransitivity, 165.3s TimeCoverageRelationStatistics Valid=315197, Invalid=327205, Unknown=0, NotChecked=0, Total=642402 [2022-12-14 11:10:54,352 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:54,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2403 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 11:10:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-12-14 11:10:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831. [2022-12-14 11:10:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions. [2022-12-14 11:10:54,432 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909 [2022-12-14 11:10:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:54,433 INFO L495 AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions. [2022-12-14 11:10:54,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions. [2022-12-14 11:10:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3830 [2022-12-14 11:10:54,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:54,508 INFO L195 NwaCegarLoop]: trace histogram [758, 757, 757, 757, 757, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:54,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:10:54,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8feb4c04-3dda-4a38-b6ba-3c9a1f3bb137/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:54,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:54,709 INFO L85 PathProgramCache]: Analyzing trace with hash 280261313, now seen corresponding path program 7 times [2022-12-14 11:10:54,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:54,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308985509] [2022-12-14 11:10:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:54,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat