./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8266a4ea95b9e4223f8b08ac8ccf14874ced037158e20412a04b64da93889ae0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:11,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:11,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:11,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:11,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:11,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:11,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:11,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:11,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:11,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:11,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:11,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:11,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:11,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:11,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:11,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:11,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:11,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:11,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:11,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:11,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:11,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:11,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:11,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:11,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:11,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:11,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:11,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:11,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:11,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:11,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:11,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:11,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:11,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:11,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:11,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:11,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:11,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:11,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:11,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:11,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:11,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:11,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:11,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:11,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:11,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:11,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:11,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:11,802 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:11,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:11,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:11,803 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:11,803 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:11,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:11,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:11,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:11,804 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:11,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:11,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:11,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:11,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:11,805 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:11,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:11,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:11,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:11,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:11,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:11,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:11,806 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:11,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:11,807 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:11,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:11,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:11,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:11,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:11,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:11,808 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:11,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:11,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:11,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:11,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:11,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:11,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:11,809 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_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8266a4ea95b9e4223f8b08ac8ccf14874ced037158e20412a04b64da93889ae0 [2022-11-03 03:29:12,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:12,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:12,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:12,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:12,101 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:12,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c [2022-11-03 03:29:12,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/data/a0fb65aa0/837807f8e3984a4ea4f4def4d643cab6/FLAG803976fea [2022-11-03 03:29:12,588 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:12,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c [2022-11-03 03:29:12,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/data/a0fb65aa0/837807f8e3984a4ea4f4def4d643cab6/FLAG803976fea [2022-11-03 03:29:12,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/data/a0fb65aa0/837807f8e3984a4ea4f4def4d643cab6 [2022-11-03 03:29:12,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:12,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:12,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:12,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:12,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:12,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:12,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d31f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12, skipping insertion in model container [2022-11-03 03:29:12,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:12,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:12,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:12,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c[546,559] [2022-11-03 03:29:12,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:12,904 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:12,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound20.c[546,559] [2022-11-03 03:29:12,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:12,950 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:12,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12 WrapperNode [2022-11-03 03:29:12,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:12,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:12,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:12,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:12,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:12,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:12,989 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-03 03:29:12,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:12,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:12,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:12,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:13,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:13,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:13,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:13,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:13,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (1/1) ... [2022-11-03 03:29:13,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:13,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:29:13,123 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:29:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:29:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:29:13,197 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:13,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:13,329 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:13,355 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:13,355 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:29:13,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:13 BoogieIcfgContainer [2022-11-03 03:29:13,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:13,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:13,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:13,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:12" (1/3) ... [2022-11-03 03:29:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a58b145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:13, skipping insertion in model container [2022-11-03 03:29:13,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:12" (2/3) ... [2022-11-03 03:29:13,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a58b145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:13, skipping insertion in model container [2022-11-03 03:29:13,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:13" (3/3) ... [2022-11-03 03:29:13,371 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound20.c [2022-11-03 03:29:13,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:13,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:13,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:13,468 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;@62d4acef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:13,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 03:29:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:29:13,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:13,482 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:13,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash -149589660, now seen corresponding path program 1 times [2022-11-03 03:29:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:13,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488839718] [2022-11-03 03:29:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:13,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:13,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:13,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719993835] [2022-11-03 03:29:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:13,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:13,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:13,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:29:13,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:13,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488839718] [2022-11-03 03:29:13,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719993835] [2022-11-03 03:29:13,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719993835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:13,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:13,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415343996] [2022-11-03 03:29:13,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:13,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:13,930 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 03:29:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:14,040 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-11-03 03:29:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:14,043 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-03 03:29:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:14,051 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:29:14,051 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 03:29:14,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:14,058 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:14,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 03:29:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-11-03 03:29:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 03:29:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-03 03:29:14,097 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2022-11-03 03:29:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:14,100 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-03 03:29:14,100 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 03:29:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-03 03:29:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:29:14,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:14,102 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:14,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:29:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 03:29:14,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2098605580, now seen corresponding path program 1 times [2022-11-03 03:29:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819722458] [2022-11-03 03:29:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:14,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083150216] [2022-11-03 03:29:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:14,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:14,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:29:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:29:14,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:29:14,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:14,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819722458] [2022-11-03 03:29:14,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083150216] [2022-11-03 03:29:14,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083150216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234218020] [2022-11-03 03:29:14,764 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 03:29:14,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:14,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:14,774 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:14,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:15,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-03 03:29:15,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:29:15,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:17,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1234218020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:17,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:17,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8, 8] total 23 [2022-11-03 03:29:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214321960] [2022-11-03 03:29:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:29:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:29:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:29:17,013 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 15 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:29:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:17,191 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-03 03:29:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:29:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 27 [2022-11-03 03:29:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:17,192 INFO L225 Difference]: With dead ends: 35 [2022-11-03 03:29:17,193 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 03:29:17,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:29:17,194 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:17,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 03:29:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 03:29:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 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) [2022-11-03 03:29:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 03:29:17,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 27 [2022-11-03 03:29:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:17,211 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 03:29:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:29:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 03:29:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:29:17,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:17,213 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:17,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:17,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:29:17,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:17,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2146569090, now seen corresponding path program 1 times [2022-11-03 03:29:17,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:17,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705061042] [2022-11-03 03:29:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:17,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:17,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:17,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937682303] [2022-11-03 03:29:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:17,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:17,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:17,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:17,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:29:17,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:29:17,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705061042] [2022-11-03 03:29:17,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937682303] [2022-11-03 03:29:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937682303] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:17,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:17,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-03 03:29:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502424706] [2022-11-03 03:29:17,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:17,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:17,855 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:29:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:17,986 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-03 03:29:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-11-03 03:29:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:17,987 INFO L225 Difference]: With dead ends: 33 [2022-11-03 03:29:17,987 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:29:17,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:17,989 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:17,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:29:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 03:29:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 03:29:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-03 03:29:18,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2022-11-03 03:29:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:18,002 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-03 03:29:18,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:29:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-03 03:29:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:29:18,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:18,004 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:18,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:18,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 639342126, now seen corresponding path program 1 times [2022-11-03 03:29:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:18,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461914499] [2022-11-03 03:29:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:18,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445855] [2022-11-03 03:29:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:18,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:18,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:18,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:29:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:18,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:18,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461914499] [2022-11-03 03:29:18,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445855] [2022-11-03 03:29:18,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:18,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489458303] [2022-11-03 03:29:18,549 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 03:29:18,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:18,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:18,555 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:18,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:19,622 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:29:19,628 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:29:19,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:20,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:20,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:20,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-03 03:29:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735822705] [2022-11-03 03:29:20,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:20,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:29:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:29:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:29:20,766 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:20,863 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-03 03:29:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2022-11-03 03:29:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:20,864 INFO L225 Difference]: With dead ends: 29 [2022-11-03 03:29:20,864 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 03:29:20,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:29:20,866 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:20,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-11-03 03:29:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 03:29:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 03:29:20,867 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) [2022-11-03 03:29:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 03:29:20,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-11-03 03:29:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:20,867 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 03:29:20,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 03:29:20,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 03:29:20,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:29:20,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:21,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:21,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 03:29:21,764 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 03:29:21,765 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (not (= (ite (<= 1 |ULTIMATE.start_main_~z~0#1|) 1 0) 0)) (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (not (= (ite (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 20)) 1 0) 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,765 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (not (= (ite (<= 1 |ULTIMATE.start_main_~z~0#1|) 1 0) 0)) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (not (= (ite (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 20)) 1 0) 0)) (= (select |#valid| 1) 1) (not (= 0 (ite (<= 1 |ULTIMATE.start_main_~k~0#1|) 1 0))) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,765 INFO L902 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: true [2022-11-03 03:29:21,766 INFO L895 garLoopResultBuilder]: At program point L36-2(lines 36 46) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (not (= (ite (<= 1 |ULTIMATE.start_main_~z~0#1|) 1 0) 0)) (= (select |#length| 3) 12) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (not (= (ite (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 20)) 1 0) 0)) (= (select |#valid| 1) 1) (not (= 0 (ite (<= 1 |ULTIMATE.start_main_~k~0#1|) 1 0))) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,766 INFO L899 garLoopResultBuilder]: For program point L36-3(lines 36 46) no Hoare annotation was computed. [2022-11-03 03:29:21,766 INFO L899 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2022-11-03 03:29:21,766 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 03:29:21,766 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (= 2 (select |#length| 1)) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,766 INFO L895 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (not (= (ite (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 20)) 1 0) 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,767 INFO L895 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= |ULTIMATE.start_main_~z~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,767 INFO L899 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-11-03 03:29:21,767 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (not (= (ite (<= 1 |ULTIMATE.start_main_~z~0#1|) 1 0) 0)) (= (select |#length| 3) 12) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= (ite (and (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 0 |ULTIMATE.start_main_~z~0#1|)) 1 0) 0)) (not (= (ite (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 20)) 1 0) 0)) (= (select |#valid| 1) 1) (not (= 0 (ite (<= 1 |ULTIMATE.start_main_~k~0#1|) 1 0))) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-03 03:29:21,768 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 36 46) no Hoare annotation was computed. [2022-11-03 03:29:21,768 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2022-11-03 03:29:21,769 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2022-11-03 03:29:21,769 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2022-11-03 03:29:21,769 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2022-11-03 03:29:21,769 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2022-11-03 03:29:21,769 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2022-11-03 03:29:21,770 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2022-11-03 03:29:21,770 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-11-03 03:29:21,774 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-03 03:29:21,778 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:29:21,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:29:21 BoogieIcfgContainer [2022-11-03 03:29:21,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:29:21,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:29:21,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:29:21,804 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:29:21,805 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:13" (3/4) ... [2022-11-03 03:29:21,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 03:29:21,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-03 03:29:21,814 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-03 03:29:21,818 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-03 03:29:21,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 03:29:21,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 03:29:21,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 03:29:21,858 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 03:29:21,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:29:21,859 INFO L158 Benchmark]: Toolchain (without parser) took 9231.31ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 78.4MB in the beginning and 117.4MB in the end (delta: -39.1MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,859 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 115.3MB. Free memory is still 95.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:29:21,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.80ms. Allocated memory is still 115.3MB. Free memory was 78.2MB in the beginning and 91.6MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,860 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.89ms. Allocated memory is still 115.3MB. Free memory was 91.6MB in the beginning and 90.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:29:21,861 INFO L158 Benchmark]: Boogie Preprocessor took 43.67ms. Allocated memory is still 115.3MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,861 INFO L158 Benchmark]: RCFGBuilder took 323.03ms. Allocated memory is still 115.3MB. Free memory was 88.9MB in the beginning and 77.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,861 INFO L158 Benchmark]: TraceAbstraction took 8443.21ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 76.9MB in the beginning and 120.6MB in the end (delta: -43.7MB). Peak memory consumption was 83.3MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,862 INFO L158 Benchmark]: Witness Printer took 54.35ms. Allocated memory is still 169.9MB. Free memory was 120.6MB in the beginning and 117.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:29:21,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 115.3MB. Free memory is still 95.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.80ms. Allocated memory is still 115.3MB. Free memory was 78.2MB in the beginning and 91.6MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.89ms. Allocated memory is still 115.3MB. Free memory was 91.6MB in the beginning and 90.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.67ms. Allocated memory is still 115.3MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 323.03ms. Allocated memory is still 115.3MB. Free memory was 88.9MB in the beginning and 77.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8443.21ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 76.9MB in the beginning and 120.6MB in the end (delta: -43.7MB). Peak memory consumption was 83.3MB. Max. memory is 16.1GB. * Witness Printer took 54.35ms. Allocated memory is still 169.9MB. Free memory was 120.6MB in the beginning and 117.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 18]: 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 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 253 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 219 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 225 IncrementalHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 62 mSDtfsCounter, 225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 188 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=3, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 18 PreInvPairs, 25 NumberOfFragments, 661 HoareAnnotationTreeSize, 18 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 686 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 189 ConstructedInterpolants, 2 QuantifiedInterpolants, 470 SizeOfPredicates, 8 NumberOfNonLiveVariables, 374 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 112/118 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: 0.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 22, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 16, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 41, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 18, DOMAIN_JOIN_TIME: 0.2s, 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: 22, 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: 10, CALL_SUMMARIZER_CACHE_MISSES: 2, 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: 226, DAG_COMPRESSION_RETAINED_NODES: 60, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((((((((!((if 1 <= z then 1 else 0) == 0) && unknown-#length-unknown[3] == 12) && x + y == x * z + 1) && 2 == unknown-#length-unknown[1]) && \valid[3] == 1) && !((if z <= 20 && 0 <= z then 1 else 0) == 0)) && !((if 0 <= k && k <= 20 then 1 else 0) == 0)) && \valid[1] == 1) && !(0 == (if 1 <= k then 1 else 0))) && \valid[0] == 0) && \valid[2] == 1) && #NULL == 0) && unknown-#memory_int-unknown[1][0] == 48) && 10 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][1] == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 RESULT: Ultimate proved your program to be correct! [2022-11-03 03:29:21,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8589045b-8f7e-48ef-8294-9cdcb7e2bbec/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE