./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/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_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/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_449f34f4-3731-4a7b-a47f-a0d1875826e7/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 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c --- 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 12:21:16,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:21:16,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:21:16,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:21:16,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:21:16,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:21:16,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:21:16,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:21:16,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:21:16,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:21:16,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:21:16,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:21:16,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:21:16,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:21:16,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:21:16,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:21:16,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:21:16,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:21:16,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:21:16,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:21:16,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:21:16,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:21:16,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:21:16,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:21:16,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:21:16,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:21:16,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:21:16,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:21:16,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:21:16,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:21:16,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:21:16,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:21:16,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:21:16,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:21:16,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:21:16,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:21:16,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:21:16,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:21:16,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:21:16,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:21:16,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:21:16,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:21:16,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:21:16,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:21:16,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:21:16,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:21:16,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:21:16,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:21:16,845 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:21:16,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:21:16,845 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:21:16,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:21:16,846 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:21:16,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:21:16,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:21:16,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:21:16,846 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:21:16,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:21:16,847 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:21:16,847 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:21:16,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:21:16,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:21:16,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:21:16,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:21:16,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:21:16,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:21:16,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:21:16,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:21:16,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:21:16,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:21:16,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:21:16,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:21:16,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:21:16,851 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_449f34f4-3731-4a7b-a47f-a0d1875826e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c [2022-12-14 12:21:17,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:21:17,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:21:17,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:21:17,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:21:17,058 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:21:17,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2022-12-14 12:21:19,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:21:19,821 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:21:19,822 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2022-12-14 12:21:19,828 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/data/f64138ae0/da7e77f13347483488017db70aba1588/FLAG50719ed73 [2022-12-14 12:21:19,842 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/data/f64138ae0/da7e77f13347483488017db70aba1588 [2022-12-14 12:21:19,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:21:19,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:21:19,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:21:19,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:21:19,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:21:19,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:21:19" (1/1) ... [2022-12-14 12:21:19,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315880a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:19, skipping insertion in model container [2022-12-14 12:21:19,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:21:19" (1/1) ... [2022-12-14 12:21:19,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:21:19,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:21:19,987 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_449f34f4-3731-4a7b-a47f-a0d1875826e7/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2022-12-14 12:21:20,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:21:20,012 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:21:20,022 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_449f34f4-3731-4a7b-a47f-a0d1875826e7/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2022-12-14 12:21:20,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:21:20,037 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:21:20,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20 WrapperNode [2022-12-14 12:21:20,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:21:20,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:21:20,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:21:20,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:21:20,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,070 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-14 12:21:20,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:21:20,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:21:20,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:21:20,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:21:20,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:21:20,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:21:20,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:21:20,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:21:20,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (1/1) ... [2022-12-14 12:21:20,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:21:20,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:20,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:21:20,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:21:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:21:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:21:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:21:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:21:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:21:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:21:20,220 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:21:20,222 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:21:20,345 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:21:20,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:21:20,379 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:21:20,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:21:20 BoogieIcfgContainer [2022-12-14 12:21:20,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:21:20,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:21:20,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:21:20,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:21:20,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:21:19" (1/3) ... [2022-12-14 12:21:20,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a86933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:21:20, skipping insertion in model container [2022-12-14 12:21:20,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:21:20" (2/3) ... [2022-12-14 12:21:20,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a86933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:21:20, skipping insertion in model container [2022-12-14 12:21:20,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:21:20" (3/3) ... [2022-12-14 12:21:20,390 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2022-12-14 12:21:20,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:21:20,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:21:20,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:21:20,447 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;@3e4fa3da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:21:20,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:21:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:21:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:21:20,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:20,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:21:20,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2022-12-14 12:21:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:20,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299226508] [2022-12-14 12:21:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:20,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:20,695 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 12:21:20,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:20,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299226508] [2022-12-14 12:21:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299226508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:21:20,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:21:20,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:21:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391190806] [2022-12-14 12:21:20,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:21:20,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:21:20,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:21:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:21:20,734 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:20,810 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-12-14 12:21:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:21:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:21:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:20,817 INFO L225 Difference]: With dead ends: 51 [2022-12-14 12:21:20,817 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 12:21:20,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:21:20,822 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:20,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:21:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 12:21:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-12-14 12:21:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:21:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-14 12:21:20,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-12-14 12:21:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:20,851 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-14 12:21:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-14 12:21:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:21:20,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:20,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:21:20,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2022-12-14 12:21:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:20,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993327721] [2022-12-14 12:21:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:20,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:20,942 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 12:21:20,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:20,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993327721] [2022-12-14 12:21:20,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993327721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:21:20,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:21:20,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:21:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050694774] [2022-12-14 12:21:20,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:21:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:21:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:21:20,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:21:20,947 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 12:21:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:20,998 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-12-14 12:21:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:21:20,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 12:21:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:20,999 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:21:20,999 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 12:21:21,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:21:21,001 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:21,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:21:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 12:21:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-12-14 12:21:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:21:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-14 12:21:21,007 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-12-14 12:21:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:21,007 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-14 12:21:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 12:21:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-14 12:21:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 12:21:21,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:21,008 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:21:21,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2022-12-14 12:21:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368810984] [2022-12-14 12:21:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:21,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:21,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372798285] [2022-12-14 12:21:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:21,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:21,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:21:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 12:21:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:21:21,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:21:21,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368810984] [2022-12-14 12:21:21,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372798285] [2022-12-14 12:21:21,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372798285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:21,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95062542] [2022-12-14 12:21:21,310 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 12:21:21,310 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:21,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:21,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:21,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:21,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-12-14 12:21:21,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:22,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [95062542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:21:22,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-12-14 12:21:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293846849] [2022-12-14 12:21:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:21:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:21:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:21:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:21:22,007 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 12:21:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:22,136 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-12-14 12:21:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:21:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-12-14 12:21:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:22,137 INFO L225 Difference]: With dead ends: 61 [2022-12-14 12:21:22,137 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 12:21:22,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:21:22,138 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:22,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:21:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 12:21:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 12:21:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 12:21:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-12-14 12:21:22,146 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-12-14 12:21:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:22,146 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-12-14 12:21:22,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 12:21:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-12-14 12:21:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:21:22,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:22,147 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 12:21:22,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:21:22,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:22,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2022-12-14 12:21:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077774970] [2022-12-14 12:21:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:22,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:22,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023524691] [2022-12-14 12:21:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:22,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:22,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:22,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:21:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:21:22,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:21:22,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 12:21:22,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077774970] [2022-12-14 12:21:22,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023524691] [2022-12-14 12:21:22,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023524691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547530860] [2022-12-14 12:21:22,613 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:21:22,613 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:22,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:22,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:22,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:24,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:21:24,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:25,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:25,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:25,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:25,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-12-14 12:21:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215897450] [2022-12-14 12:21:25,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:21:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:21:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:21:25,204 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 12:21:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:25,551 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-12-14 12:21:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:21:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 33 [2022-12-14 12:21:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:25,553 INFO L225 Difference]: With dead ends: 77 [2022-12-14 12:21:25,553 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 12:21:25,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:21:25,554 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:25,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:21:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 12:21:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 12:21:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 12:21:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-12-14 12:21:25,563 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-12-14 12:21:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-12-14 12:21:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 12:21:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-12-14 12:21:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 12:21:25,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:25,565 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:25,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:21:25,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:25,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480357, now seen corresponding path program 1 times [2022-12-14 12:21:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:25,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853560570] [2022-12-14 12:21:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:25,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:25,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562077310] [2022-12-14 12:21:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:25,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:25,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:25,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:21:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:21:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:21:25,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 12:21:25,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853560570] [2022-12-14 12:21:25,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562077310] [2022-12-14 12:21:25,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562077310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807596519] [2022-12-14 12:21:25,999 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:21:26,000 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:26,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:26,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:26,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:27,712 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:21:27,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:28,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1175#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:28,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:28,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:28,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-14 12:21:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400594373] [2022-12-14 12:21:28,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:28,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:21:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:21:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:21:28,275 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:21:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:28,366 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-12-14 12:21:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:21:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 40 [2022-12-14 12:21:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:28,368 INFO L225 Difference]: With dead ends: 73 [2022-12-14 12:21:28,368 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:21:28,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:21:28,369 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:28,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:21:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:21:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-12-14 12:21:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 12:21:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-12-14 12:21:28,384 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-12-14 12:21:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:28,384 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-12-14 12:21:28,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:21:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-12-14 12:21:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 12:21:28,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:28,386 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:28,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:21:28,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:28,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2022-12-14 12:21:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987469724] [2022-12-14 12:21:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:28,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39558899] [2022-12-14 12:21:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:28,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:28,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:28,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:21:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:21:28,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 12:21:28,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 12:21:30,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987469724] [2022-12-14 12:21:30,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39558899] [2022-12-14 12:21:30,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39558899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378434387] [2022-12-14 12:21:30,362 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:21:30,362 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:30,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:30,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:30,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:32,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:21:32,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:33,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1725#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:33,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:33,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:33,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-14 12:21:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488958114] [2022-12-14 12:21:33,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:21:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:21:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:21:33,096 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:21:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:34,813 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-12-14 12:21:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:21:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2022-12-14 12:21:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:34,814 INFO L225 Difference]: With dead ends: 96 [2022-12-14 12:21:34,814 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 12:21:34,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:21:34,815 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:34,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:21:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 12:21:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-12-14 12:21:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 12:21:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-12-14 12:21:34,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-12-14 12:21:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:34,833 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-12-14 12:21:34,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:21:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-12-14 12:21:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:21:34,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:34,834 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:34,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:21:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:21:35,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2022-12-14 12:21:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:35,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997720777] [2022-12-14 12:21:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:35,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:35,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071945377] [2022-12-14 12:21:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:35,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:35,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:35,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:35,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:21:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 12:21:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 12:21:35,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 12:21:35,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:35,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997720777] [2022-12-14 12:21:35,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:35,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071945377] [2022-12-14 12:21:35,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071945377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:35,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305349962] [2022-12-14 12:21:35,614 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 12:21:35,615 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:35,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:35,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:35,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:37,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:21:37,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:38,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2410#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:38,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:38,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:38,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-14 12:21:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944016579] [2022-12-14 12:21:38,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:21:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:21:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:21:38,646 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 12:21:41,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:21:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:41,375 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-12-14 12:21:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:21:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-12-14 12:21:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:41,378 INFO L225 Difference]: With dead ends: 114 [2022-12-14 12:21:41,378 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 12:21:41,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:21:41,378 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 377 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 12:21:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 12:21:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-12-14 12:21:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 12:21:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-12-14 12:21:41,395 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-12-14 12:21:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:41,396 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-12-14 12:21:41,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 12:21:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-12-14 12:21:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:21:41,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:41,397 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:41,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:21:41,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 12:21:41,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2022-12-14 12:21:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956831210] [2022-12-14 12:21:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:41,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:41,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499289750] [2022-12-14 12:21:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:41,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:41,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:41,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:21:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:41,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:21:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 12:21:41,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:21:41,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956831210] [2022-12-14 12:21:41,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499289750] [2022-12-14 12:21:41,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499289750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:21:41,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:21:41,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:21:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374760057] [2022-12-14 12:21:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:21:41,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:21:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:21:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:21:41,698 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:21:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:41,746 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-12-14 12:21:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:21:41,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2022-12-14 12:21:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:41,748 INFO L225 Difference]: With dead ends: 92 [2022-12-14 12:21:41,748 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 12:21:41,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:21:41,748 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:21:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 12:21:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 12:21:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 12:21:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-12-14 12:21:41,762 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-12-14 12:21:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:41,762 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-12-14 12:21:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:21:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-12-14 12:21:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:21:41,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:41,763 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:41,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:21:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:41,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1241228560, now seen corresponding path program 2 times [2022-12-14 12:21:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:41,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344786746] [2022-12-14 12:21:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:41,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:41,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:41,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778544899] [2022-12-14 12:21:41,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:21:41,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:41,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:41,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:41,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:21:42,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:21:42,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 12:21:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 12:21:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-12-14 12:21:43,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344786746] [2022-12-14 12:21:43,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778544899] [2022-12-14 12:21:43,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778544899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897529555] [2022-12-14 12:21:43,066 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:21:43,066 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:43,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:43,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:43,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:45,048 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:21:45,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:45,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3641#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:45,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:45,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:45,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-12-14 12:21:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476347766] [2022-12-14 12:21:45,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:21:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:21:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:21:45,727 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 12:21:52,796 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:21:54,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:21:57,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:21:59,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:22:00,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:22:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:00,805 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-12-14 12:22:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:22:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-12-14 12:22:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:00,807 INFO L225 Difference]: With dead ends: 112 [2022-12-14 12:22:00,807 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 12:22:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:22:00,808 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 30 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:00,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 88 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 362 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2022-12-14 12:22:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 12:22:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-12-14 12:22:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 12:22:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-12-14 12:22:00,832 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-12-14 12:22:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:00,833 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-12-14 12:22:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 12:22:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-12-14 12:22:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:22:00,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:00,834 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 12:22:00,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:22:01,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:01,035 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2022-12-14 12:22:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:01,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640172910] [2022-12-14 12:22:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:01,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:22:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971473381] [2022-12-14 12:22:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:22:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:01,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:01,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:22:01,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:22:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:22:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 12:22:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:29,593 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 48 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:22:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 100 proven. 67 refuted. 2 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-14 12:22:41,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:13,122 WARN L233 SmtUtils]: Spent 25.27s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:25:32,402 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:26:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 12:26:02,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640172910] [2022-12-14 12:26:02,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:26:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971473381] [2022-12-14 12:26:02,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971473381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278770738] [2022-12-14 12:26:02,027 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:26:02,027 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:26:02,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:26:02,028 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:26:02,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:26:04,214 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:26:04,222 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:26:11,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4490#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:26:11,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:26:11,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:26:11,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-12-14 12:26:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306602340] [2022-12-14 12:26:11,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:26:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:11,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:26:11,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=970, Unknown=4, NotChecked=0, Total=1190 [2022-12-14 12:26:11,280 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-12-14 12:27:50,327 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 167 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:27:54,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:16,104 WARN L233 SmtUtils]: Spent 16.40s on a formula simplification. DAG size of input: 123 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:28:27,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:29,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:31,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:34,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:37,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:28:39,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:03,161 WARN L233 SmtUtils]: Spent 18.57s on a formula simplification. DAG size of input: 74 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:29:05,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:07,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:09,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:11,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:12,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:15,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:17,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:19,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:21,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:23,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:25,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:26,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:30,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:29:32,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:35,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:37,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:39,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:40,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:42,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:44,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:49,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:29:54,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:30:49,353 WARN L233 SmtUtils]: Spent 39.25s on a formula simplification. DAG size of input: 139 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:30:59,706 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse35 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse36 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse36)) (.cse5 (and .cse36 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not .cse35)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22)))))))))) .cse35 (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|))))) is different from false [2022-12-14 12:30:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:59,718 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2022-12-14 12:30:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 12:30:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) Word has length 81 [2022-12-14 12:30:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:59,719 INFO L225 Difference]: With dead ends: 128 [2022-12-14 12:30:59,719 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 12:30:59,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 311.8s TimeCoverageRelationStatistics Valid=347, Invalid=1626, Unknown=11, NotChecked=86, Total=2070 [2022-12-14 12:30:59,720 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 89 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 70.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:59,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 98 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 372 Invalid, 15 Unknown, 2 Unchecked, 70.1s Time] [2022-12-14 12:30:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 12:30:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-12-14 12:30:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 12:30:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-12-14 12:30:59,760 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 81 [2022-12-14 12:30:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:59,760 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-12-14 12:30:59,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-12-14 12:30:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-12-14 12:30:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 12:30:59,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:59,761 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:59,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:30:59,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:30:59,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 20862120, now seen corresponding path program 2 times [2022-12-14 12:30:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461709012] [2022-12-14 12:30:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:59,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430559424] [2022-12-14 12:30:59,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:30:59,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:59,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:59,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:59,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:31:00,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:31:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:31:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 122 proven. 39 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-12-14 12:31:00,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-12-14 12:31:00,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:00,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461709012] [2022-12-14 12:31:00,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:31:00,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430559424] [2022-12-14 12:31:00,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430559424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:00,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659404348] [2022-12-14 12:31:00,362 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 12:31:00,362 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:00,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:00,362 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:00,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:02,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 12:31:02,488 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:03,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5461#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:03,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:03,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:31:03,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2022-12-14 12:31:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498588564] [2022-12-14 12:31:03,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:03,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:31:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:03,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:31:03,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:31:03,273 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 12:31:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:03,721 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2022-12-14 12:31:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:31:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 92 [2022-12-14 12:31:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:03,722 INFO L225 Difference]: With dead ends: 127 [2022-12-14 12:31:03,722 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 12:31:03,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:31:03,723 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:03,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:31:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 12:31:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 12:31:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 12:31:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 12:31:03,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-12-14 12:31:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:03,724 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 12:31:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 12:31:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 12:31:03,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 12:31:03,726 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 12:31:03,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:31:03,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:31:03,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 12:31:25,862 WARN L233 SmtUtils]: Spent 11.06s on a formula simplification. DAG size of input: 266 DAG size of output: 104 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 12:31:34,625 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse0) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse0) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse0 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) .cse2 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse0 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-12-14 12:31:34,625 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse1 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse0 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse1) (let ((.cse3 (select |#memory_int| 1)) (.cse2 (select |#memory_int| 2))) (and (= (select .cse2 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse2 2)) (= (select .cse2 6) 99) (= 97 (select .cse2 1)) (= 2 (select |#length| 1)) .cse0 (= (select |#valid| 3) 1) (= (select .cse2 4) 50) (= 100 (select .cse2 3)) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse2 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) .cse1 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse3 1) 0) (= (select .cse2 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-12-14 12:31:34,625 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse4 (select |#memory_int| 1)) (.cse3 (select |#memory_int| 2))) (and (= (select .cse3 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse3 2)) (= (select .cse3 6) 99) (= 97 (select .cse3 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse3 4) 50) (= 100 (select .cse3 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse3 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse2 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse4 1) 0) (= (select .cse3 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse1 .cse2)))) [2022-12-14 12:31:34,626 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse0) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse0) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse0 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) .cse2 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse0 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-12-14 12:31:34,626 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse0) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse0) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse0 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) .cse2 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse0 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-12-14 12:31:34,626 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-12-14 12:31:34,626 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 12:31:34,626 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 12:31:34,626 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-12-14 12:31:34,626 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 12:31:34,626 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse4 (select |#memory_int| 1)) (.cse3 (select |#memory_int| 2))) (and (= (select .cse3 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse3 2)) (= (select .cse3 6) 99) (= 97 (select .cse3 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse3 4) 50) (= 100 (select .cse3 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse3 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse2 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse4 1) 0) (= (select .cse3 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse1 .cse2)))) [2022-12-14 12:31:34,626 INFO L902 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-12-14 12:31:34,627 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse4 (select |#memory_int| 1)) (.cse3 (select |#memory_int| 2))) (and (= (select .cse3 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse3 2)) (= (select .cse3 6) 99) (= 97 (select .cse3 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse3 4) 50) (= 100 (select .cse3 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse3 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse2 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse4 1) 0) (= (select .cse3 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse1 .cse2)))) [2022-12-14 12:31:34,627 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse2 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|))) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse0 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3)) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse4 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse6 (select |#memory_int| 1)) (.cse5 (select |#memory_int| 2))) (and (= (select .cse5 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse5 2)) (= (select .cse5 6) 99) (= 97 (select .cse5 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse5 4) 50) (= 100 (select .cse5 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse4 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse5 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse6 0) 48) .cse1 .cse3 (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 20) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse6 1) 0) (= (select .cse5 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-12-14 12:31:34,627 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-12-14 12:31:34,627 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-12-14 12:31:34,627 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-12-14 12:31:34,627 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-12-14 12:31:34,627 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2022-12-14 12:31:34,627 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-12-14 12:31:34,629 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:34,631 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:31:34,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:31:34 BoogieIcfgContainer [2022-12-14 12:31:34,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:31:34,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:31:34,645 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:31:34,645 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:31:34,645 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:21:20" (3/4) ... [2022-12-14 12:31:34,647 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 12:31:34,651 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 12:31:34,654 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-12-14 12:31:34,654 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 12:31:34,654 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-14 12:31:34,654 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 12:31:34,654 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 12:31:34,670 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((2 == p && A == r) && 1 <= r) && d * q + r == A) && B == 1) && 2 == d) || (((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && B * p == d) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && (if A <= 20 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0)) || ((((((2 * (B * (-(-p / -2) / -2)) <= r && 2 * B <= d) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p) && d * q + r == A) && B == 1) [2022-12-14 12:31:34,671 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((1 <= p && A == q + r) && 2 * B <= A) && d == p) && B == 1) || (((((B + r == A && B == d) && p == q) && q == 1) && B <= A) && B == 1)) || (((((2 == p && q == 0) && A == r) && 1 <= r) && B == 1) && 2 == d)) || (((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && p == 1) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && q == 0) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B == 1) && (if A <= 20 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) [2022-12-14 12:31:34,675 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 12:31:34,676 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:31:34,676 INFO L158 Benchmark]: Toolchain (without parser) took 614830.31ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 83.1MB in the beginning and 134.7MB in the end (delta: -51.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,676 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 92.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:31:34,676 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.21ms. Allocated memory is still 125.8MB. Free memory was 83.1MB in the beginning and 72.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,676 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.61ms. Allocated memory is still 125.8MB. Free memory was 72.6MB in the beginning and 70.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,676 INFO L158 Benchmark]: Boogie Preprocessor took 17.99ms. Allocated memory is still 125.8MB. Free memory was 70.8MB in the beginning and 70.0MB in the end (delta: 860.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:31:34,677 INFO L158 Benchmark]: RCFGBuilder took 291.64ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 56.3MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,677 INFO L158 Benchmark]: TraceAbstraction took 614260.69ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 55.9MB in the beginning and 137.9MB in the end (delta: -82.0MB). Peak memory consumption was 74.2MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,677 INFO L158 Benchmark]: Witness Printer took 30.85ms. Allocated memory is still 182.5MB. Free memory was 137.9MB in the beginning and 134.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:31:34,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 92.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.21ms. Allocated memory is still 125.8MB. Free memory was 83.1MB in the beginning and 72.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.61ms. Allocated memory is still 125.8MB. Free memory was 72.6MB in the beginning and 70.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.99ms. Allocated memory is still 125.8MB. Free memory was 70.8MB in the beginning and 70.0MB in the end (delta: 860.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 291.64ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 56.3MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 614260.69ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 55.9MB in the beginning and 137.9MB in the end (delta: -82.0MB). Peak memory consumption was 74.2MB. Max. memory is 16.1GB. * Witness Printer took 30.85ms. Allocated memory is still 182.5MB. Free memory was 137.9MB in the beginning and 134.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 614.2s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 309.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 30.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 mSolverCounterUnknown, 264 SdHoareTripleChecker+Valid, 82.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 216 mSDsluCounter, 750 SdHoareTripleChecker+Invalid, 81.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2 IncrementalHoareTripleChecker+Unchecked, 503 mSDsCounter, 352 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2278 IncrementalHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 352 mSolverCounterUnsat, 247 mSDtfsCounter, 2278 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1459 GetRequests, 1189 SyntacticMatches, 40 SemanticMatches, 230 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 325.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=10, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 34 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 67 PreInvPairs, 124 NumberOfFragments, 1791 HoareAnnotationTreeSize, 67 FomulaSimplifications, 1791 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 17019 FormulaSimplificationTreeSizeReductionInter, 30.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 245.3s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 13407 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1307 ConjunctsInSsa, 242 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3180/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 69, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((1 <= p && A == q + r) && 2 * B <= A) && d == p) && B == 1) || (((((B + r == A && B == d) && p == q) && q == 1) && B <= A) && B == 1)) || (((((2 == p && q == 0) && A == r) && 1 <= r) && B == 1) && 2 == d)) || (((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && p == 1) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && q == 0) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B == 1) && (if A <= 20 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((2 == p && A == r) && 1 <= r) && d * q + r == A) && B == 1) && 2 == d) || (((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && B * p == d) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && (if A <= 20 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0)) || ((((((2 * (B * (-(-p / -2) / -2)) <= r && 2 * B <= d) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p) && d * q + r == A) && B == 1) RESULT: Ultimate proved your program to be correct! [2022-12-14 12:31:34,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449f34f4-3731-4a7b-a47f-a0d1875826e7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE