./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- 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 06:43:17,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:43:17,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:43:17,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:43:17,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:43:17,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:43:17,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:43:17,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:43:17,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:43:17,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:43:17,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:43:17,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:43:17,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:43:17,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:43:17,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:43:17,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:43:17,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:43:17,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:43:17,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:43:17,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:43:17,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:43:17,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:43:17,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:43:17,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:43:17,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:43:17,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:43:17,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:43:17,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:43:17,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:43:17,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:43:17,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:43:17,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:43:17,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:43:17,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:43:17,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:43:17,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:43:17,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:43:17,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:43:17,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:43:17,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:43:17,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:43:17,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:43:17,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:43:17,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:43:17,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:43:17,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:43:17,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:43:17,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:43:17,730 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:43:17,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:43:17,730 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:43:17,731 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:43:17,732 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:43:17,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:43:17,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:43:17,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:43:17,733 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:43:17,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:43:17,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:43:17,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:43:17,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:43:17,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:43:17,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:43:17,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:43:17,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:43:17,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:43:17,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:43:17,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:43:17,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:43:17,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:43:17,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:43:17,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:43:17,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:43:17,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:43:17,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:17,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:43:17,739 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:43:17,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:43:17,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:43:17,740 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:43:17,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:43:17,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:43:17,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:43:17,740 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2022-11-19 06:43:18,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:43:18,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:43:18,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:43:18,090 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:43:18,090 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:43:18,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-19 06:43:18,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/2d3ffc3b7/0ce873a1e30a452f9bbb1f08a5d69d15/FLAG486f3bf45 [2022-11-19 06:43:18,729 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:43:18,730 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-19 06:43:18,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/2d3ffc3b7/0ce873a1e30a452f9bbb1f08a5d69d15/FLAG486f3bf45 [2022-11-19 06:43:19,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/2d3ffc3b7/0ce873a1e30a452f9bbb1f08a5d69d15 [2022-11-19 06:43:19,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:43:19,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:43:19,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:19,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:43:19,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:43:19,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57df1d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19, skipping insertion in model container [2022-11-19 06:43:19,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:43:19,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:43:19,360 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-19 06:43:19,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:19,397 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:43:19,408 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-19 06:43:19,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:19,431 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:43:19,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19 WrapperNode [2022-11-19 06:43:19,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:19,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:19,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:43:19,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:43:19,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,466 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-11-19 06:43:19,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:19,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:43:19,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:43:19,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:43:19,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:43:19,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:43:19,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:43:19,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:43:19,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (1/1) ... [2022-11-19 06:43:19,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:19,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:43:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:43:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:43:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:43:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:43:19,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:43:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:43:19,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:43:19,641 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:43:19,643 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:43:19,863 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:43:19,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:43:19,893 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:43:19,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:19 BoogieIcfgContainer [2022-11-19 06:43:19,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:43:19,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:43:19,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:43:19,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:43:19,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:43:19" (1/3) ... [2022-11-19 06:43:19,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fd7f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:19, skipping insertion in model container [2022-11-19 06:43:19,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:19" (2/3) ... [2022-11-19 06:43:19,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fd7f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:19, skipping insertion in model container [2022-11-19 06:43:19,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:19" (3/3) ... [2022-11-19 06:43:19,905 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2022-11-19 06:43:19,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:43:19,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:43:19,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:43:19,979 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;@212acca1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:43:19,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:43:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:43:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:43:19,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:19,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:43:19,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2022-11-19 06:43:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469921293] [2022-11-19 06:43:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469921293] [2022-11-19 06:43:20,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 06:43:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757995605] [2022-11-19 06:43:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:20,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:20,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:43:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 06:43:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757995605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:20,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:43:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104968631] [2022-11-19 06:43:20,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:43:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:43:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:20,384 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,427 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-19 06:43:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:43:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:43:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,438 INFO L225 Difference]: With dead ends: 35 [2022-11-19 06:43:20,438 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 06:43:20,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:20,449 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:43:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 06:43:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 06:43:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:43:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-19 06:43:20,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-19 06:43:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,506 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-19 06:43:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-19 06:43:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:43:20,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:43:20,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2022-11-19 06:43:20,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33312962] [2022-11-19 06:43:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:20,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33312962] [2022-11-19 06:43:20,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 06:43:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309496866] [2022-11-19 06:43:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:20,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:20,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:43:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:43:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:20,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309496866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:20,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:43:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973405743] [2022-11-19 06:43:20,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:43:20,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:43:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:20,895 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,937 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-19 06:43:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:43:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:43:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,940 INFO L225 Difference]: With dead ends: 27 [2022-11-19 06:43:20,940 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:43:20,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:20,943 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:43:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:43:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 06:43:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:43:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-19 06:43:20,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-19 06:43:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,954 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-19 06:43:20,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-19 06:43:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:43:20,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 06:43:21,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2022-11-19 06:43:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875476572] [2022-11-19 06:43:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:21,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:21,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663646800] [2022-11-19 06:43:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:21,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:21,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:21,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:43:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:21,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:43:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:21,274 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:43:21,275 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:43:21,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:43:21,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:21,491 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-19 06:43:21,494 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:43:21,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:43:21 BoogieIcfgContainer [2022-11-19 06:43:21,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:43:21,519 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:43:21,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:43:21,519 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:43:21,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:19" (3/4) ... [2022-11-19 06:43:21,523 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 06:43:21,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:43:21,528 INFO L158 Benchmark]: Toolchain (without parser) took 2422.47ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 71.3MB in the beginning and 76.1MB in the end (delta: -4.8MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,534 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 54.5MB in the beginning and 54.5MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:43:21,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.51ms. Allocated memory is still 100.7MB. Free memory was 71.1MB in the beginning and 76.9MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.77ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 75.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:43:21,535 INFO L158 Benchmark]: Boogie Preprocessor took 21.41ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,536 INFO L158 Benchmark]: RCFGBuilder took 406.88ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 63.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,537 INFO L158 Benchmark]: TraceAbstraction took 1619.26ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 62.5MB in the beginning and 76.6MB in the end (delta: -14.1MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,540 INFO L158 Benchmark]: Witness Printer took 4.56ms. Allocated memory is still 123.7MB. Free memory was 76.6MB in the beginning and 76.1MB in the end (delta: 554.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:43:21,542 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 100.7MB. Free memory was 54.5MB in the beginning and 54.5MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.51ms. Allocated memory is still 100.7MB. Free memory was 71.1MB in the beginning and 76.9MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.77ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 75.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.41ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 406.88ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 63.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1619.26ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 62.5MB in the beginning and 76.6MB in the end (delta: -14.1MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Witness Printer took 4.56ms. Allocated memory is still 123.7MB. Free memory was 76.6MB in the beginning and 76.1MB in the end (delta: 554.5kB). 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: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 06:43:21,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- 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 06:43:23,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:43:23,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:43:24,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:43:24,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:43:24,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:43:24,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:43:24,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:43:24,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:43:24,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:43:24,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:43:24,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:43:24,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:43:24,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:43:24,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:43:24,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:43:24,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:43:24,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:43:24,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:43:24,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:43:24,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:43:24,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:43:24,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:43:24,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:43:24,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:43:24,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:43:24,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:43:24,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:43:24,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:43:24,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:43:24,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:43:24,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:43:24,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:43:24,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:43:24,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:43:24,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:43:24,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:43:24,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:43:24,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:43:24,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:43:24,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:43:24,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 06:43:24,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:43:24,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:43:24,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:43:24,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:43:24,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:43:24,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:43:24,124 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:43:24,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:43:24,124 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:43:24,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:43:24,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:43:24,126 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:43:24,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:43:24,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:43:24,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:43:24,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:43:24,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:43:24,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:43:24,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:43:24,129 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:43:24,129 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:43:24,129 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:43:24,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:43:24,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:43:24,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:43:24,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:43:24,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:43:24,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:43:24,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:43:24,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:24,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:43:24,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:43:24,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:43:24,132 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:43:24,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:43:24,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:43:24,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:43:24,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:43:24,133 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2022-11-19 06:43:24,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:43:24,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:43:24,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:43:24,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:43:24,603 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:43:24,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-19 06:43:24,692 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/dc8d181e9/e531b677104547749c9f055c42148d58/FLAGcd1a9a06b [2022-11-19 06:43:25,225 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:43:25,225 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-19 06:43:25,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/dc8d181e9/e531b677104547749c9f055c42148d58/FLAGcd1a9a06b [2022-11-19 06:43:25,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/data/dc8d181e9/e531b677104547749c9f055c42148d58 [2022-11-19 06:43:25,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:43:25,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:43:25,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:25,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:43:25,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:43:25,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:25,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb347a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25, skipping insertion in model container [2022-11-19 06:43:25,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:25,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:43:25,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:43:25,879 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-19 06:43:25,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:25,932 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:43:25,945 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_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-19 06:43:25,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:25,975 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:43:25,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25 WrapperNode [2022-11-19 06:43:25,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:25,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:25,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:43:25,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:43:25,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:25,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,012 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-19 06:43:26,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:26,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:43:26,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:43:26,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:43:26,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:43:26,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:43:26,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:43:26,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:43:26,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (1/1) ... [2022-11-19 06:43:26,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:26,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:43:26,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:43:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:43:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:43:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:43:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:43:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:43:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:43:26,191 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:43:26,194 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:43:28,270 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:43:28,292 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:43:28,292 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:43:28,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:28 BoogieIcfgContainer [2022-11-19 06:43:28,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:43:28,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:43:28,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:43:28,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:43:28,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:43:25" (1/3) ... [2022-11-19 06:43:28,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359c7be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:28, skipping insertion in model container [2022-11-19 06:43:28,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:25" (2/3) ... [2022-11-19 06:43:28,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359c7be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:28, skipping insertion in model container [2022-11-19 06:43:28,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:28" (3/3) ... [2022-11-19 06:43:28,317 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2022-11-19 06:43:28,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:43:28,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:43:28,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:43:28,429 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;@11b60640, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:43:28,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:43:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:43:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:43:28,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:28,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:28,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-11-19 06:43:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:43:28,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721661522] [2022-11-19 06:43:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:28,469 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 06:43:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:43:28,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 06:43:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:28,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:28,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:43:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721661522] [2022-11-19 06:43:28,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721661522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:28,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:28,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:43:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720236234] [2022-11-19 06:43:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:28,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:43:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:43:28,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:43:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:28,715 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:28,739 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-11-19 06:43:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:43:28,741 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:43:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:28,749 INFO L225 Difference]: With dead ends: 40 [2022-11-19 06:43:28,749 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 06:43:28,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:28,756 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:28,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:43:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 06:43:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 06:43:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:43:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-19 06:43:28,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-11-19 06:43:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:28,805 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-19 06:43:28,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-19 06:43:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:43:28,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:28,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:28,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-11-19 06:43:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:43:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828546615] [2022-11-19 06:43:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:29,030 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 06:43:29,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:43:29,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:29,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:43:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:29,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:29,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:43:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828546615] [2022-11-19 06:43:29,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828546615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:29,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:29,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:43:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389177127] [2022-11-19 06:43:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:29,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:43:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:43:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:43:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:29,321 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:29,389 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-19 06:43:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:43:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:43:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:29,394 INFO L225 Difference]: With dead ends: 28 [2022-11-19 06:43:29,394 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 06:43:29,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:29,397 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 06:43:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 06:43:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:43:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-19 06:43:29,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-11-19 06:43:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:29,406 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-19 06:43:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-19 06:43:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:43:29,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:29,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:29,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-11-19 06:43:29,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:43:29,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385201992] [2022-11-19 06:43:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:29,622 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 06:43:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:43:29,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:29,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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)] Waiting until timeout for monitored process [2022-11-19 06:43:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:29,781 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:43:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:29,896 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Invalid model [2022-11-19 06:43:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1972382609] [2022-11-19 06:43:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:43:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:43:29,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:43:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-19 06:43:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:43:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:30,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:30,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:43:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385201992] [2022-11-19 06:43:30,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972382609] [2022-11-19 06:43:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972382609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:30,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:30,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125134538] [2022-11-19 06:43:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:43:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:43:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:43:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:30,320 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:33,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:35,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:37,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:39,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:41,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:43,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:47,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:50,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 06:43:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:50,033 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-19 06:43:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:43:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:50,132 INFO L225 Difference]: With dead ends: 33 [2022-11-19 06:43:50,132 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 06:43:50,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:43:50,133 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:50,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 19.6s Time] [2022-11-19 06:43:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 06:43:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-19 06:43:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:43:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-19 06:43:50,143 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2022-11-19 06:43:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:50,144 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-19 06:43:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-19 06:43:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:43:50,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:50,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:50,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:50,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-19 06:43:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:43:50,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-11-19 06:43:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:43:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159560862] [2022-11-19 06:43:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:50,548 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 06:43:50,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:43:50,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:50,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/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 06:43:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:50,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:43:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:51,230 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Invalid model [2022-11-19 06:43:51,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [359235601] [2022-11-19 06:43:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:51,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:43:51,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:43:51,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:43:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8694f60-4c9a-4ff3-9e44-eeff00dfeca7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 06:43:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:43:51,734 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:43:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat