./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS --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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- 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-8393723 [2022-11-19 07:56:25,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:56:25,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:56:25,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:56:25,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:56:25,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:56:25,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:56:25,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:56:25,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:56:25,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:56:25,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:56:25,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:56:25,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:56:25,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:56:25,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:56:25,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:56:25,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:56:25,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:56:25,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:56:25,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:56:25,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:56:25,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:56:25,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:56:25,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:56:25,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:56:25,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:56:25,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:56:25,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:56:25,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:56:25,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:56:25,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:56:25,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:56:25,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:56:25,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:56:25,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:56:25,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:56:25,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:56:25,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:56:25,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:56:25,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:56:25,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:56:25,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:56:25,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:56:25,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:56:25,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:56:25,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:56:25,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:56:25,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:56:25,739 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:56:25,740 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:56:25,740 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:56:25,740 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:56:25,741 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:56:25,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:56:25,742 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:56:25,742 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:56:25,742 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:56:25,742 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:56:25,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:56:25,743 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:56:25,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:56:25,744 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:56:25,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:56:25,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:56:25,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:56:25,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:56:25,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:56:25,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:56:25,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:56:25,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:56:25,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:56:25,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:56:25,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:56:25,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:56:25,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:25,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:56:25,749 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:56:25,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:56:25,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:56:25,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:56:25,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:56:25,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:56:25,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:56:25,750 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_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2022-11-19 07:56:26,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:56:26,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:56:26,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:56:26,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:56:26,107 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:56:26,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-11-19 07:56:26,186 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/cab722729/52408544f70d4a1bae023ba12267e718/FLAG944e2bc27 [2022-11-19 07:56:26,679 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:56:26,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-11-19 07:56:26,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/cab722729/52408544f70d4a1bae023ba12267e718/FLAG944e2bc27 [2022-11-19 07:56:27,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/cab722729/52408544f70d4a1bae023ba12267e718 [2022-11-19 07:56:27,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:56:27,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:56:27,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:27,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:56:27,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:56:27,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ab72ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27, skipping insertion in model container [2022-11-19 07:56:27,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:56:27,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:56:27,299 WARN L234 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_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-11-19 07:56:27,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:27,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:56:27,388 WARN L234 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_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-11-19 07:56:27,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:27,429 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:56:27,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27 WrapperNode [2022-11-19 07:56:27,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:27,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:27,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:56:27,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:56:27,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,472 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-11-19 07:56:27,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:27,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:56:27,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:56:27,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:56:27,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:56:27,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:56:27,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:56:27,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:56:27,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (1/1) ... [2022-11-19 07:56:27,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:27,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:56:27,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:56:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:56:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:56:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-19 07:56:27,661 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-19 07:56:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:56:27,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:56:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-19 07:56:27,661 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-19 07:56:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:56:27,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:56:27,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:56:27,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:56:28,133 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:56:28,386 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:56:28,386 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:56:28,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:28 BoogieIcfgContainer [2022-11-19 07:56:28,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:56:28,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:56:28,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:56:28,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:56:28,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:27" (1/3) ... [2022-11-19 07:56:28,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf5d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:28, skipping insertion in model container [2022-11-19 07:56:28,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27" (2/3) ... [2022-11-19 07:56:28,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf5d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:28, skipping insertion in model container [2022-11-19 07:56:28,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:28" (3/3) ... [2022-11-19 07:56:28,398 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2022-11-19 07:56:28,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:56:28,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:56:28,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:28,468 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;@7f8bde50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:28,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:56:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:56:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:56:28,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:28,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1161026278, now seen corresponding path program 1 times [2022-11-19 07:56:28,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218956769] [2022-11-19 07:56:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:56:29,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218956769] [2022-11-19 07:56:29,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218956769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:29,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 07:56:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670628393] [2022-11-19 07:56:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:29,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:56:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:56:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:56:29,324 INFO L87 Difference]: Start difference. First operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:56:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:29,632 INFO L93 Difference]: Finished difference Result 112 states and 171 transitions. [2022-11-19 07:56:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:56:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-19 07:56:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:29,655 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:56:29,657 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 07:56:29,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:56:29,666 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 17 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:29,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 350 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 07:56:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-19 07:56:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-19 07:56:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2022-11-19 07:56:29,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 26 [2022-11-19 07:56:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:29,717 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2022-11-19 07:56:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:56:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2022-11-19 07:56:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:56:29,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:29,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:29,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:56:29,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1509547258, now seen corresponding path program 1 times [2022-11-19 07:56:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:29,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319703401] [2022-11-19 07:56:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:56:30,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319703401] [2022-11-19 07:56:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319703401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807451189] [2022-11-19 07:56:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:30,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:30,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:56:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:30,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:56:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:56:30,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:56:30,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807451189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969474804] [2022-11-19 07:56:30,791 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 07:56:30,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:56:30,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:56:30,805 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:56:30,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:56:31,152 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 36 for LOIs [2022-11-19 07:56:31,459 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2022-11-19 07:56:31,546 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-19 07:56:31,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:35,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(and (= (select |#length| 3) 12) (= (select |#length| 2) 24) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:35,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:56:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2022-11-19 07:56:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578095833] [2022-11-19 07:56:35,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:35,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:56:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:56:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:56:35,249 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:56:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:35,667 INFO L93 Difference]: Finished difference Result 138 states and 191 transitions. [2022-11-19 07:56:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:56:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-11-19 07:56:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:35,669 INFO L225 Difference]: With dead ends: 138 [2022-11-19 07:56:35,669 INFO L226 Difference]: Without dead ends: 85 [2022-11-19 07:56:35,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:56:35,675 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 29 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:35,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 423 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:56:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-19 07:56:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2022-11-19 07:56:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-19 07:56:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-19 07:56:35,699 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2022-11-19 07:56:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:35,700 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-19 07:56:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:56:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-19 07:56:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:56:35,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:35,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:35,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2067080582, now seen corresponding path program 2 times [2022-11-19 07:56:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989288984] [2022-11-19 07:56:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:56:36,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989288984] [2022-11-19 07:56:36,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989288984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:36,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:36,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:56:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983993859] [2022-11-19 07:56:36,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:36,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:56:36,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:36,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:56:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:56:36,207 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:36,323 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2022-11-19 07:56:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:56:36,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-19 07:56:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:36,327 INFO L225 Difference]: With dead ends: 102 [2022-11-19 07:56:36,327 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 07:56:36,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:56:36,329 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:36,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 324 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 07:56:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-11-19 07:56:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-19 07:56:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-19 07:56:36,340 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2022-11-19 07:56:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:36,341 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-19 07:56:36,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-19 07:56:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:56:36,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:36,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:56:36,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash -589085310, now seen corresponding path program 1 times [2022-11-19 07:56:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:36,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719426537] [2022-11-19 07:56:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:56:36,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:36,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719426537] [2022-11-19 07:56:36,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719426537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:36,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:36,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-19 07:56:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351326963] [2022-11-19 07:56:36,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:56:36,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:56:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:56:36,991 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:56:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:37,361 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2022-11-19 07:56:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:56:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-11-19 07:56:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:37,363 INFO L225 Difference]: With dead ends: 85 [2022-11-19 07:56:37,363 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:56:37,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:56:37,364 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 26 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:37,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 606 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:56:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-11-19 07:56:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-19 07:56:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2022-11-19 07:56:37,373 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 35 [2022-11-19 07:56:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:37,374 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2022-11-19 07:56:37,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:56:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2022-11-19 07:56:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:56:37,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:37,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:56:37,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash 253828518, now seen corresponding path program 3 times [2022-11-19 07:56:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:37,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316845683] [2022-11-19 07:56:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:37,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:37,526 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:56:37,526 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:37,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:56:37,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:56:37,533 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-19 07:56:37,536 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:56:37,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:56:37 BoogieIcfgContainer [2022-11-19 07:56:37,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:56:37,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:56:37,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:56:37,566 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:56:37,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:28" (3/4) ... [2022-11-19 07:56:37,570 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:56:37,570 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:56:37,571 INFO L158 Benchmark]: Toolchain (without parser) took 10508.76ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 72.3MB in the beginning and 53.4MB in the end (delta: 18.9MB). Peak memory consumption was 72.7MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,571 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:56:37,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.17ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 88.8MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,572 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.87ms. Allocated memory is still 117.4MB. Free memory was 88.8MB in the beginning and 87.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:56:37,572 INFO L158 Benchmark]: Boogie Preprocessor took 76.60ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 85.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,572 INFO L158 Benchmark]: RCFGBuilder took 834.17ms. Allocated memory is still 117.4MB. Free memory was 85.8MB in the beginning and 51.8MB in the end (delta: 34.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,573 INFO L158 Benchmark]: TraceAbstraction took 9174.82ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 51.1MB in the beginning and 54.5MB in the end (delta: -3.4MB). Peak memory consumption was 51.7MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,573 INFO L158 Benchmark]: Witness Printer took 4.08ms. Allocated memory is still 172.0MB. Free memory was 54.5MB in the beginning and 53.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:37,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.17ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 88.8MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.87ms. Allocated memory is still 117.4MB. Free memory was 88.8MB in the beginning and 87.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 76.60ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 85.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 834.17ms. Allocated memory is still 117.4MB. Free memory was 85.8MB in the beginning and 51.8MB in the end (delta: 34.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9174.82ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 51.1MB in the beginning and 54.5MB in the end (delta: -3.4MB). Peak memory consumption was 51.7MB. Max. memory is 16.1GB. * Witness Printer took 4.08ms. Allocated memory is still 172.0MB. Free memory was 54.5MB in the beginning and 53.4MB in the end (delta: 1.1MB). 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 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 108, overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; VAL [ea=-126, eb=127] [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-126, eb=127] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-126, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=33554432, e=-126, m=0, res=33554432] [L80] return (__retres4); [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=33554432, ea=-126, eb=127, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554431] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=127, \old(m)=33554431, __retres4=16777215, e=127, m=33554431, res=16777215] [L80] return (__retres4); [L243] RET, EXPR base2flt(mb, eb) VAL [a=33554432, base2flt(mb, eb)=8606711807, ea=-126, eb=127, ma=16777216, mb=33554431, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=33554432, \old(b)=16777215] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=33554432, \old(b)=16777215, a=33554432, b=16777215, tmp=33554432] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=33554432, \old(b)=16777215, a=33554432, b=16777215, ea=-126, eb=384, ma=16777216, mb=16777216, tmp=33554432] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.1s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 1703 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1509 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 906 IncrementalHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 194 mSDtfsCounter, 906 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 433 SizeOfPredicates, 8 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-19 07:56:37,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS --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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- 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-8393723 [2022-11-19 07:56:39,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:56:39,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:56:39,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:56:39,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:56:39,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:56:39,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:56:39,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:56:39,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:56:39,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:56:39,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:56:39,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:56:39,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:56:39,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:56:39,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:56:39,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:56:39,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:56:39,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:56:39,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:56:39,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:56:39,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:56:39,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:56:39,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:56:39,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:56:39,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:56:39,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:56:39,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:56:39,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:56:39,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:56:39,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:56:39,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:56:39,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:56:39,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:56:39,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:56:39,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:56:39,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:56:39,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:56:39,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:56:39,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:56:39,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:56:39,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:56:39,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 07:56:40,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:56:40,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:56:40,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:56:40,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:56:40,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:56:40,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:56:40,042 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:56:40,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:56:40,042 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:56:40,042 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:56:40,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:56:40,044 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:56:40,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:56:40,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:56:40,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:56:40,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:56:40,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:56:40,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:56:40,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:56:40,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:56:40,047 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:56:40,047 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:56:40,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:56:40,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:56:40,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:56:40,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:56:40,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:56:40,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:56:40,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:56:40,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:40,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:56:40,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:56:40,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:56:40,050 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:56:40,050 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:40,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:56:40,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:56:40,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:56:40,051 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2022-11-19 07:56:40,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:56:40,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:56:40,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:56:40,482 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:56:40,483 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:56:40,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-11-19 07:56:40,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/2569ac1ba/49d47a7732df4794a0d4196658f02051/FLAGa2d3fd35f [2022-11-19 07:56:41,221 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:56:41,221 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-11-19 07:56:41,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/2569ac1ba/49d47a7732df4794a0d4196658f02051/FLAGa2d3fd35f [2022-11-19 07:56:41,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/data/2569ac1ba/49d47a7732df4794a0d4196658f02051 [2022-11-19 07:56:41,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:56:41,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:56:41,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:41,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:56:41,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:56:41,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:41" (1/1) ... [2022-11-19 07:56:41,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2529abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:41, skipping insertion in model container [2022-11-19 07:56:41,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:41" (1/1) ... [2022-11-19 07:56:41,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:56:41,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:56:41,788 WARN L234 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_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-11-19 07:56:41,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:41,916 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:56:41,956 WARN L234 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_2448d205-6f28-44ce-be54-c148ad54a02c/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-11-19 07:56:42,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:42,044 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:56:42,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42 WrapperNode [2022-11-19 07:56:42,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:42,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:42,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:56:42,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:56:42,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,105 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-19 07:56:42,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:42,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:56:42,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:56:42,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:56:42,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:56:42,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:56:42,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:56:42,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:56:42,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2022-11-19 07:56:42,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:42,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:56:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:56:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:56:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:56:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-19 07:56:42,283 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-19 07:56:42,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:56:42,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:56:42,284 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-19 07:56:42,285 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-19 07:56:42,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:56:42,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:56:42,408 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:56:42,410 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:56:42,734 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:56:42,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:56:42,742 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:56:42,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:42 BoogieIcfgContainer [2022-11-19 07:56:42,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:56:42,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:56:42,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:56:42,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:56:42,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:41" (1/3) ... [2022-11-19 07:56:42,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7324318d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:42, skipping insertion in model container [2022-11-19 07:56:42,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (2/3) ... [2022-11-19 07:56:42,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7324318d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:42, skipping insertion in model container [2022-11-19 07:56:42,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:42" (3/3) ... [2022-11-19 07:56:42,794 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2022-11-19 07:56:42,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:56:42,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:56:42,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:42,930 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;@67c4424b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:42,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:56:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:56:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:56:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:42,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:42,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 173410466, now seen corresponding path program 1 times [2022-11-19 07:56:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:42,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787829565] [2022-11-19 07:56:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:42,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:42,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:42,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:42,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:56:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:43,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:56:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:43,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:43,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787829565] [2022-11-19 07:56:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787829565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:43,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:56:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528513217] [2022-11-19 07:56:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:43,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:56:43,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:56:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:56:43,376 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:43,561 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2022-11-19 07:56:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:56:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-19 07:56:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:43,575 INFO L225 Difference]: With dead ends: 130 [2022-11-19 07:56:43,576 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 07:56:43,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:56:43,590 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 23 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:43,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 459 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 07:56:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-11-19 07:56:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 47 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-19 07:56:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2022-11-19 07:56:43,674 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 31 [2022-11-19 07:56:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:43,675 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2022-11-19 07:56:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2022-11-19 07:56:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:56:43,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:43,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:43,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:43,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:43,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1707598935, now seen corresponding path program 1 times [2022-11-19 07:56:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:43,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965017572] [2022-11-19 07:56:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:43,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:43,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:43,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:56:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:43,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:56:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965017572] [2022-11-19 07:56:44,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965017572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222686535] [2022-11-19 07:56:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:44,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:44,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-19 07:56:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:56:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222686535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489702814] [2022-11-19 07:56:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:44,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:44,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:44,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:56:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:56:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489702814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:44,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:56:44,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2022-11-19 07:56:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586695010] [2022-11-19 07:56:44,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:44,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:56:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:56:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:56:44,568 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:56:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:44,741 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2022-11-19 07:56:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:56:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-11-19 07:56:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:44,744 INFO L225 Difference]: With dead ends: 121 [2022-11-19 07:56:44,744 INFO L226 Difference]: Without dead ends: 93 [2022-11-19 07:56:44,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:56:44,746 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 27 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:44,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 492 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-19 07:56:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-11-19 07:56:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-19 07:56:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-19 07:56:44,762 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 35 [2022-11-19 07:56:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-19 07:56:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:56:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-19 07:56:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:56:44,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:44,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:44,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:44,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:45,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:45,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1508244029, now seen corresponding path program 1 times [2022-11-19 07:56:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154495476] [2022-11-19 07:56:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:45,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:45,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:45,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:56:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:45,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:56:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:45,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:45,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154495476] [2022-11-19 07:56:45,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154495476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [660741443] [2022-11-19 07:56:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:45,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:45,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:56:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:56:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:56:45,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:45,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [660741443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:45,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:56:45,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2022-11-19 07:56:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703996693] [2022-11-19 07:56:45,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:45,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:56:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:56:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:56:45,869 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:56:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:46,055 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2022-11-19 07:56:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:56:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-19 07:56:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:46,057 INFO L225 Difference]: With dead ends: 114 [2022-11-19 07:56:46,058 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 07:56:46,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:56:46,060 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 20 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:46,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 516 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 07:56:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-11-19 07:56:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:56:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-11-19 07:56:46,073 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 39 [2022-11-19 07:56:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:46,073 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-11-19 07:56:46,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:56:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-11-19 07:56:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:56:46,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:46,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:46,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:46,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:46,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:46,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash -54729342, now seen corresponding path program 2 times [2022-11-19 07:56:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:46,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168765758] [2022-11-19 07:56:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:56:46,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:46,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:46,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:56:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:56:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:56:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:56:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:56:46,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:46,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168765758] [2022-11-19 07:56:46,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168765758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:46,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:46,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:56:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093441814] [2022-11-19 07:56:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:46,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:56:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:56:46,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:56:46,652 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:46,731 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2022-11-19 07:56:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:56:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-19 07:56:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:46,733 INFO L225 Difference]: With dead ends: 98 [2022-11-19 07:56:46,734 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 07:56:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:56:46,735 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:46,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 330 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-19 07:56:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 07:56:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2022-11-19 07:56:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 65 states have internal predecessors, (79), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-19 07:56:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-11-19 07:56:46,747 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 39 [2022-11-19 07:56:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:46,748 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-11-19 07:56:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-11-19 07:56:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:56:46,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:46,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:46,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:46,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2528960, now seen corresponding path program 1 times [2022-11-19 07:56:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:46,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357741705] [2022-11-19 07:56:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:46,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:46,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:56:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:56:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:56:47,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:47,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357741705] [2022-11-19 07:56:47,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357741705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:47,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:47,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:56:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329811092] [2022-11-19 07:56:47,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:56:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:56:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:56:47,167 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:47,261 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-11-19 07:56:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:56:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-19 07:56:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:47,265 INFO L225 Difference]: With dead ends: 94 [2022-11-19 07:56:47,265 INFO L226 Difference]: Without dead ends: 92 [2022-11-19 07:56:47,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:56:47,269 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:47,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 308 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-19 07:56:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-19 07:56:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-11-19 07:56:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 63 states have internal predecessors, (77), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:56:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2022-11-19 07:56:47,292 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 39 [2022-11-19 07:56:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:47,293 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2022-11-19 07:56:47,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:56:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2022-11-19 07:56:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:56:47,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:47,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:47,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:47,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1136903568, now seen corresponding path program 1 times [2022-11-19 07:56:47,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:47,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746516294] [2022-11-19 07:56:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:47,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:47,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:47,499 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:47,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:56:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:56:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:47,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:47,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746516294] [2022-11-19 07:56:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746516294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571324780] [2022-11-19 07:56:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:47,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:47,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:47,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:47,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-19 07:56:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:56:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:47,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:48,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1571324780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:48,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843375062] [2022-11-19 07:56:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:48,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:48,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:48,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:56:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:56:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843375062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:48,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:56:48,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-11-19 07:56:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132477060] [2022-11-19 07:56:48,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:48,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:56:48,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:56:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:56:48,260 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:56:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:48,513 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2022-11-19 07:56:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:56:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-19 07:56:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:48,515 INFO L225 Difference]: With dead ends: 129 [2022-11-19 07:56:48,515 INFO L226 Difference]: Without dead ends: 118 [2022-11-19 07:56:48,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:56:48,517 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 42 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:48,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 501 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-19 07:56:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-11-19 07:56:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-19 07:56:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-11-19 07:56:48,536 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 44 [2022-11-19 07:56:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:48,536 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-11-19 07:56:48,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:56:48,537 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-11-19 07:56:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:56:48,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:48,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:48,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:48,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:48,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:49,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:49,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1837968146, now seen corresponding path program 1 times [2022-11-19 07:56:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753630575] [2022-11-19 07:56:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:49,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:49,153 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:49,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:56:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:56:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:56:49,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:49,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753630575] [2022-11-19 07:56:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753630575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 07:56:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388786988] [2022-11-19 07:56:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:56:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:56:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:56:49,339 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:56:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:49,676 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-11-19 07:56:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:56:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-19 07:56:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:49,679 INFO L225 Difference]: With dead ends: 133 [2022-11-19 07:56:49,679 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:56:49,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:56:49,681 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 34 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:49,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 669 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:56:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2022-11-19 07:56:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 75 states have internal predecessors, (89), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-19 07:56:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2022-11-19 07:56:49,711 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 44 [2022-11-19 07:56:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2022-11-19 07:56:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:56:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2022-11-19 07:56:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:56:49,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:49,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:49,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:49,934 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1849173563, now seen corresponding path program 1 times [2022-11-19 07:56:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494822097] [2022-11-19 07:56:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:49,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:56:49,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:56:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:50,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:50,074 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-19 07:56:50,075 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:50,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:56:50,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:50,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:50,283 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:50,287 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:56:50,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:56:50 BoogieIcfgContainer [2022-11-19 07:56:50,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:56:50,331 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:56:50,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:56:50,332 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:56:50,332 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:42" (3/4) ... [2022-11-19 07:56:50,335 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:56:50,401 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:56:50,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:56:50,402 INFO L158 Benchmark]: Toolchain (without parser) took 8826.59ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 47.8MB in the beginning and 49.7MB in the end (delta: -1.9MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,403 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 48.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:56:50,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.51ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 49.7MB in the end (delta: -2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,403 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.91ms. Allocated memory is still 67.1MB. Free memory was 49.5MB in the beginning and 48.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,404 INFO L158 Benchmark]: Boogie Preprocessor took 61.43ms. Allocated memory is still 67.1MB. Free memory was 48.0MB in the beginning and 46.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:56:50,405 INFO L158 Benchmark]: RCFGBuilder took 574.89ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 32.1MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,405 INFO L158 Benchmark]: TraceAbstraction took 7543.40ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 50.5MB in the beginning and 53.7MB in the end (delta: -3.2MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,406 INFO L158 Benchmark]: Witness Printer took 70.48ms. Allocated memory is still 98.6MB. Free memory was 53.7MB in the beginning and 49.7MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:56:50,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 48.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 468.51ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 49.7MB in the end (delta: -2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.91ms. Allocated memory is still 67.1MB. Free memory was 49.5MB in the beginning and 48.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.43ms. Allocated memory is still 67.1MB. Free memory was 48.0MB in the beginning and 46.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 574.89ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 32.1MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7543.40ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 50.5MB in the beginning and 53.7MB in the end (delta: -3.2MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * Witness Printer took 70.48ms. Allocated memory is still 98.6MB. Free memory was 53.7MB in the beginning and 49.7MB in the end (delta: 4.0MB). 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L243] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=2147483648, \old(b)=3221225472] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 182 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 164 mSDsluCounter, 3275 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 2788 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 607 IncrementalHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 487 mSDtfsCounter, 607 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=7, InterpolantAutomatonStates: 63, 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, 7 MinimizatonAttempts, 112 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 513 NumberOfCodeBlocks, 495 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 725 ConstructedInterpolants, 2 QuantifiedInterpolants, 1208 SizeOfPredicates, 36 NumberOfNonLiveVariables, 954 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 302/344 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:56:50,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2448d205-6f28-44ce-be54-c148ad54a02c/bin/utaipan-I9t0OCRTmS/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE