./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 64bit --witnessprinter.graph.data.programhash d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea --- 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 06:34:21,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:34:21,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:34:21,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:34:21,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:34:21,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:34:21,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:34:21,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:34:21,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:34:21,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:34:21,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:34:21,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:34:21,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:34:21,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:34:21,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:34:21,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:34:21,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:34:21,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:34:21,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:34:21,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:34:21,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:34:21,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:34:21,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:34:21,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:34:21,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:34:21,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:34:21,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:34:21,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:34:21,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:34:21,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:34:21,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:34:21,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:34:21,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:34:21,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:34:21,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:34:21,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:34:21,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:34:21,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:34:21,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:34:21,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:34:21,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:34:21,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:34:21,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:34:21,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:34:21,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:34:21,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:34:21,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:34:21,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:34:21,281 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:34:21,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:34:21,281 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:34:21,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:34:21,282 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:34:21,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:34:21,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:34:21,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:34:21,283 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:34:21,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:34:21,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:34:21,284 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:34:21,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:34:21,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:34:21,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:34:21,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:34:21,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:34:21,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:34:21,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:34:21,287 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:34:21,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:34:21,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:34:21,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:34:21,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:21,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:34:21,289 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:34:21,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:34:21,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:34:21,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:34:21,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:34:21,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:34:21,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:34:21,290 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea [2022-11-19 06:34:21,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:34:21,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:34:21,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:34:21,640 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:34:21,641 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:34:21,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:21,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/957d481b1/f1b2fc6bf9fd4aa9b3aae551c13f6293/FLAG47caaf2c5 [2022-11-19 06:34:22,224 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:34:22,225 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:22,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/957d481b1/f1b2fc6bf9fd4aa9b3aae551c13f6293/FLAG47caaf2c5 [2022-11-19 06:34:22,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/957d481b1/f1b2fc6bf9fd4aa9b3aae551c13f6293 [2022-11-19 06:34:22,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:34:22,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:34:22,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:22,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:34:22,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:34:22,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:22" (1/1) ... [2022-11-19 06:34:22,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6effd392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:22, skipping insertion in model container [2022-11-19 06:34:22,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:22" (1/1) ... [2022-11-19 06:34:22,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:34:22,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:34:22,860 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-19 06:34:23,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:23,173 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:34:23,185 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-19 06:34:23,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:23,364 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:34:23,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23 WrapperNode [2022-11-19 06:34:23,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:23,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:23,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:34:23,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:34:23,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,544 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1606 [2022-11-19 06:34:23,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:23,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:34:23,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:34:23,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:34:23,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:34:23,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:34:23,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:34:23,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:34:23,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (1/1) ... [2022-11-19 06:34:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:23,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:23,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:34:23,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:34:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:34:23,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:34:24,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:34:24,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:34:25,882 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:34:30,218 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:34:30,219 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:34:30,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:30 BoogieIcfgContainer [2022-11-19 06:34:30,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:34:30,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:34:30,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:34:30,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:34:30,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:34:22" (1/3) ... [2022-11-19 06:34:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f50c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:30, skipping insertion in model container [2022-11-19 06:34:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:23" (2/3) ... [2022-11-19 06:34:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f50c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:30, skipping insertion in model container [2022-11-19 06:34:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:30" (3/3) ... [2022-11-19 06:34:30,231 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:30,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:34:30,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:34:30,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:34:30,307 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;@19017970, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:34:30,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:34:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:34:30,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:30,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:34:30,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:30,324 INFO L85 PathProgramCache]: Analyzing trace with hash 30229821, now seen corresponding path program 1 times [2022-11-19 06:34:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543229180] [2022-11-19 06:34:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:34:30,658 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:34:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:34:30,772 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:34:30,774 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:34:30,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:34:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:34:30,783 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-19 06:34:30,787 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:34:30,824 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 06:34:30,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:34:30 BoogieIcfgContainer [2022-11-19 06:34:30,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:34:30,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:34:30,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:34:30,847 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:34:30,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:30" (3/4) ... [2022-11-19 06:34:30,852 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 06:34:30,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:34:30,855 INFO L158 Benchmark]: Toolchain (without parser) took 8317.84ms. Allocated memory was 119.5MB in the beginning and 620.8MB in the end (delta: 501.2MB). Free memory was 85.9MB in the beginning and 447.6MB in the end (delta: -361.7MB). Peak memory consumption was 139.1MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,855 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory was 71.3MB in the beginning and 71.2MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:34:30,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 826.97ms. Allocated memory is still 119.5MB. Free memory was 85.6MB in the beginning and 64.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,857 INFO L158 Benchmark]: Boogie Procedure Inliner took 179.04ms. Allocated memory is still 119.5MB. Free memory was 64.6MB in the beginning and 50.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,863 INFO L158 Benchmark]: Boogie Preprocessor took 198.34ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 50.1MB in the beginning and 108.7MB in the end (delta: -58.6MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,864 INFO L158 Benchmark]: RCFGBuilder took 6477.53ms. Allocated memory was 144.7MB in the beginning and 620.8MB in the end (delta: 476.1MB). Free memory was 108.7MB in the beginning and 487.4MB in the end (delta: -378.8MB). Peak memory consumption was 388.7MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,865 INFO L158 Benchmark]: TraceAbstraction took 620.82ms. Allocated memory is still 620.8MB. Free memory was 487.4MB in the beginning and 447.6MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-19 06:34:30,866 INFO L158 Benchmark]: Witness Printer took 6.63ms. Allocated memory is still 620.8MB. Free memory is still 447.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:34:30,875 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 119.5MB. Free memory was 71.3MB in the beginning and 71.2MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 826.97ms. Allocated memory is still 119.5MB. Free memory was 85.6MB in the beginning and 64.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 179.04ms. Allocated memory is still 119.5MB. Free memory was 64.6MB in the beginning and 50.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 198.34ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 50.1MB in the beginning and 108.7MB in the end (delta: -58.6MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * RCFGBuilder took 6477.53ms. Allocated memory was 144.7MB in the beginning and 620.8MB in the end (delta: 476.1MB). Free memory was 108.7MB in the beginning and 487.4MB in the end (delta: -378.8MB). Peak memory consumption was 388.7MB. Max. memory is 16.1GB. * TraceAbstraction took 620.82ms. Allocated memory is still 620.8MB. Free memory was 487.4MB in the beginning and 447.6MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 6.63ms. Allocated memory is still 620.8MB. Free memory is still 447.6MB. There was no memory consumed. 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: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 164, overapproximation of bitwiseComplement at line 169, overapproximation of bitwiseAnd at line 142. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_3 var_59 = 0; [L40] const SORT_4 var_61 = 5; [L41] const SORT_2 var_65 = 2; [L42] const SORT_4 var_69 = 1; [L43] const SORT_2 var_75 = 4; [L44] const SORT_4 var_77 = 2; [L45] const SORT_2 var_101 = 12; [L46] const SORT_2 var_154 = 15; [L47] const SORT_2 var_169 = 10; [L49] SORT_1 input_66; [L50] SORT_1 input_76; [L51] SORT_1 input_82; [L52] SORT_1 input_106; [L53] SORT_1 input_109; [L54] SORT_1 input_110; [L55] SORT_1 input_126; [L56] SORT_1 input_145; [L57] SORT_1 input_187; [L58] SORT_1 input_208; [L60] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L61] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L62] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L63] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L64] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L65] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L66] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L67] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L68] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L69] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L70] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L71] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L72] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L73] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L74] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_2 init_7_arg_1 = var_5; [L88] state_6 = init_7_arg_1 [L89] SORT_2 init_9_arg_1 = var_5; [L90] state_8 = init_9_arg_1 [L91] SORT_2 init_11_arg_1 = var_5; [L92] state_10 = init_11_arg_1 [L93] SORT_2 init_13_arg_1 = var_5; [L94] state_12 = init_13_arg_1 [L95] SORT_2 init_15_arg_1 = var_5; [L96] state_14 = init_15_arg_1 [L97] SORT_2 init_17_arg_1 = var_5; [L98] state_16 = init_17_arg_1 [L99] SORT_2 init_19_arg_1 = var_5; [L100] state_18 = init_19_arg_1 [L101] SORT_2 init_21_arg_1 = var_5; [L102] state_20 = init_21_arg_1 [L103] SORT_2 init_23_arg_1 = var_5; [L104] state_22 = init_23_arg_1 [L105] SORT_2 init_25_arg_1 = var_5; [L106] state_24 = init_25_arg_1 [L107] SORT_2 init_27_arg_1 = var_5; [L108] state_26 = init_27_arg_1 [L109] SORT_2 init_29_arg_1 = var_5; [L110] state_28 = init_29_arg_1 [L111] SORT_1 init_32_arg_1 = var_30; [L112] state_31 = init_32_arg_1 [L113] SORT_1 init_34_arg_1 = var_30; [L114] state_33 = init_34_arg_1 [L115] SORT_1 init_36_arg_1 = var_30; [L116] state_35 = init_36_arg_1 [L117] SORT_1 init_38_arg_1 = var_30; [L118] state_37 = init_38_arg_1 [L119] SORT_1 init_40_arg_1 = var_30; [L120] state_39 = init_40_arg_1 [L121] SORT_1 init_42_arg_1 = var_30; [L122] state_41 = init_42_arg_1 [L123] SORT_1 init_44_arg_1 = var_30; [L124] state_43 = init_44_arg_1 [L125] SORT_1 init_46_arg_1 = var_30; [L126] state_45 = init_46_arg_1 [L127] SORT_1 init_48_arg_1 = var_30; [L128] state_47 = init_48_arg_1 [L129] SORT_1 init_50_arg_1 = var_30; [L130] state_49 = init_50_arg_1 [L131] SORT_1 init_52_arg_1 = var_30; [L132] state_51 = init_52_arg_1 [L133] SORT_1 init_54_arg_1 = var_30; [L134] state_53 = init_54_arg_1 [L135] SORT_1 init_56_arg_1 = var_30; [L136] state_55 = init_56_arg_1 [L137] SORT_1 init_58_arg_1 = var_30; [L138] state_57 = init_58_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_6=0, state_8=0, var_101=12, var_154=15, var_169=10, var_30=0, var_5=0, var_59=0, var_61=5, var_65=2, var_69=1, var_75=4, var_77=2] [L141] input_66 = __VERIFIER_nondet_uchar() [L142] input_66 = input_66 & mask_SORT_1 [L143] input_76 = __VERIFIER_nondet_uchar() [L144] input_76 = input_76 & mask_SORT_1 [L145] input_82 = __VERIFIER_nondet_uchar() [L146] input_82 = input_82 & mask_SORT_1 [L147] input_106 = __VERIFIER_nondet_uchar() [L148] input_106 = input_106 & mask_SORT_1 [L149] input_109 = __VERIFIER_nondet_uchar() [L150] input_109 = input_109 & mask_SORT_1 [L151] input_110 = __VERIFIER_nondet_uchar() [L152] input_110 = input_110 & mask_SORT_1 [L153] input_126 = __VERIFIER_nondet_uchar() [L154] input_126 = input_126 & mask_SORT_1 [L155] input_145 = __VERIFIER_nondet_uchar() [L156] input_145 = input_145 & mask_SORT_1 [L157] input_187 = __VERIFIER_nondet_uchar() [L158] input_187 = input_187 & mask_SORT_1 [L159] input_208 = __VERIFIER_nondet_uchar() [L162] SORT_3 var_60_arg_0 = var_59; [L163] SORT_2 var_60_arg_1 = state_28; [L164] SORT_4 var_60 = ((SORT_4)var_60_arg_0 << 8) | var_60_arg_1; [L165] var_60 = var_60 & mask_SORT_4 [L166] SORT_4 var_62_arg_0 = var_60; [L167] SORT_4 var_62_arg_1 = var_61; [L168] SORT_1 var_62 = var_62_arg_0 <= var_62_arg_1; [L169] SORT_1 var_63_arg_0 = ~state_57; [L170] var_63_arg_0 = var_63_arg_0 & mask_SORT_1 [L171] SORT_1 var_63_arg_1 = ~var_62; [L172] var_63_arg_1 = var_63_arg_1 & mask_SORT_1 [L173] SORT_1 var_63 = var_63_arg_0 & var_63_arg_1; [L174] var_63 = var_63 & mask_SORT_1 [L175] SORT_1 bad_64_arg_0 = var_63; [L176] CALL __VERIFIER_assert(!(bad_64_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 06:34:30,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 64bit --witnessprinter.graph.data.programhash d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea --- 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 06:34:33,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:34:33,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:34:33,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:34:33,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:34:33,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:34:33,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:34:33,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:34:33,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:34:33,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:34:33,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:34:33,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:34:33,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:34:33,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:34:33,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:34:33,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:34:33,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:34:33,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:34:33,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:34:33,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:34:33,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:34:33,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:34:33,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:34:33,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:34:33,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:34:33,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:34:33,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:34:33,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:34:33,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:34:33,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:34:33,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:34:33,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:34:33,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:34:33,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:34:33,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:34:33,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:34:33,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:34:33,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:34:33,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:34:33,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:34:33,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:34:33,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 06:34:33,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:34:33,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:34:33,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:34:33,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:34:33,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:34:33,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:34:33,352 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:34:33,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:34:33,353 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:34:33,353 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:34:33,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:34:33,354 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:34:33,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:34:33,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:34:33,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:34:33,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:34:33,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:34:33,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:34:33,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:34:33,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:34:33,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:34:33,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:34:33,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:34:33,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:34:33,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:34:33,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:34:33,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:33,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:34:33,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:34:33,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:34:33,360 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:34:33,360 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:34:33,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:34:33,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:34:33,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:34:33,361 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea [2022-11-19 06:34:33,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:34:33,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:34:33,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:34:33,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:34:33,753 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:34:33,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:33,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/72525b1f9/56de3de2c88d4267be6f02d676f0ead7/FLAG177bf60ee [2022-11-19 06:34:34,464 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:34:34,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:34,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/72525b1f9/56de3de2c88d4267be6f02d676f0ead7/FLAG177bf60ee [2022-11-19 06:34:34,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/data/72525b1f9/56de3de2c88d4267be6f02d676f0ead7 [2022-11-19 06:34:34,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:34:34,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:34:34,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:34,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:34:34,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:34:34,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:34" (1/1) ... [2022-11-19 06:34:34,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10be1c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:34, skipping insertion in model container [2022-11-19 06:34:34,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:34" (1/1) ... [2022-11-19 06:34:34,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:34:34,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:34:35,046 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-19 06:34:35,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:35,309 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:34:35,320 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_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-19 06:34:35,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:35,543 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:34:35,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35 WrapperNode [2022-11-19 06:34:35,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:35,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:35,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:34:35,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:34:35,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,684 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1074 [2022-11-19 06:34:35,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:35,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:34:35,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:34:35,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:34:35,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:34:35,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:34:35,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:34:35,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:34:35,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (1/1) ... [2022-11-19 06:34:35,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:35,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:35,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:34:35,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:34:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:34:35,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:34:36,277 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:34:36,279 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:34:37,884 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:34:37,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:34:37,891 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:34:37,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:37 BoogieIcfgContainer [2022-11-19 06:34:37,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:34:37,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:34:37,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:34:37,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:34:37,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:34:34" (1/3) ... [2022-11-19 06:34:37,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8646ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:37, skipping insertion in model container [2022-11-19 06:34:37,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:35" (2/3) ... [2022-11-19 06:34:37,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8646ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:37, skipping insertion in model container [2022-11-19 06:34:37,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:37" (3/3) ... [2022-11-19 06:34:37,902 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-19 06:34:37,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:34:37,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:34:37,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:34:37,975 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;@19815fd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:34:37,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:34:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:34:37,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:37,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:34:37,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-19 06:34:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:34:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953088106] [2022-11-19 06:34:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:38,008 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 06:34:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:34:38,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:38,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:34:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:38,473 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 06:34:38,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:34:38,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:34:38,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953088106] [2022-11-19 06:34:38,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953088106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:38,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:34:38,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:34:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541781543] [2022-11-19 06:34:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:34:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:34:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:34:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:34:38,524 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:38,758 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-19 06:34:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:34:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 06:34:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:38,768 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:34:38,768 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 06:34:38,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:34:38,775 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:38,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:34:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 06:34:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-19 06:34:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-19 06:34:38,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-19 06:34:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:38,807 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-19 06:34:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-19 06:34:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:34:38,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:38,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:38,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:39,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:39,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:39,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-19 06:34:39,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:34:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049127152] [2022-11-19 06:34:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:39,026 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 06:34:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:34:39,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:39,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:39,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:34:39,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:40,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:42,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:34:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049127152] [2022-11-19 06:34:42,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049127152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032869477] [2022-11-19 06:34:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:34:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:34:42,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:34:42,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-19 06:34:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:34:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:43,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:43,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032869477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940882571] [2022-11-19 06:34:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:43,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:43,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:43,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:43,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:34:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 06:34:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:44,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:45,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940882571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:45,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:34:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 12 [2022-11-19 06:34:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133566331] [2022-11-19 06:34:45,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:34:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:34:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:34:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:34:45,563 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:45,656 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-19 06:34:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:34:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:34:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:45,658 INFO L225 Difference]: With dead ends: 14 [2022-11-19 06:34:45,658 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 06:34:45,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:34:45,660 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:45,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-11-19 06:34:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 06:34:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 06:34:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-19 06:34:45,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-19 06:34:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:45,670 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-19 06:34:45,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-19 06:34:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:34:45,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:45,672 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 06:34:45,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:45,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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)] Ended with exit code 0 [2022-11-19 06:34:46,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:46,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:34:46,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-19 06:34:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:34:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49485507] [2022-11-19 06:34:46,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:34:46,284 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 06:34:46,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:34:46,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:46,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:34:47,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:34:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:47,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 06:34:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:49,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:34:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49485507] [2022-11-19 06:34:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49485507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064832540] [2022-11-19 06:34:49,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:34:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:34:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:34:49,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:34:49,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 06:34:50,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:34:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 06:34:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:51,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:12,199 WARN L233 SmtUtils]: Spent 13.99s on a formula simplification. DAG size of input: 107 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:35:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:12,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064832540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339559399] [2022-11-19 06:35:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:35:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:35:12,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:35:12,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:35:12,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:35:13,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:35:13,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:35:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 06:35:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:13,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:19,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339559399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:19,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:35:19,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 23 [2022-11-19 06:35:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201257701] [2022-11-19 06:35:19,260 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:35:19,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 06:35:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:35:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 06:35:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=357, Unknown=2, NotChecked=0, Total=506 [2022-11-19 06:35:19,264 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:35:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:20,217 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-19 06:35:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:35:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 06:35:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:20,218 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:35:20,218 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:35:20,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=217, Invalid=537, Unknown=2, NotChecked=0, Total=756 [2022-11-19 06:35:20,220 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:20,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-11-19 06:35:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:35:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 06:35:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:35:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-19 06:35:20,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-11-19 06:35:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:20,236 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-19 06:35:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:35:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-19 06:35:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:35:20,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:20,238 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2022-11-19 06:35:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:35:20,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:35:20,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:35:20,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:35:20,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1250702327, now seen corresponding path program 3 times [2022-11-19 06:35:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:35:20,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011811553] [2022-11-19 06:35:20,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:35:20,847 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 06:35:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:35:20,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:35:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 06:35:22,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 06:35:22,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:35:22,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 3474 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-19 06:35:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:24,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:39,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:35:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011811553] [2022-11-19 06:35:39,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011811553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170754] [2022-11-19 06:35:39,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:35:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:35:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:35:39,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:35:39,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 06:35:43,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 06:35:43,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:35:43,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 3474 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-19 06:35:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:46,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:55,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [170754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:55,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494806005] [2022-11-19 06:35:55,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:35:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:35:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:35:55,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:35:55,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:35:56,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 06:35:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:35:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 3474 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-19 06:35:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:35:59,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:36:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:36:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494806005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:36:16,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:36:16,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 46 [2022-11-19 06:36:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880966518] [2022-11-19 06:36:16,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:36:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 06:36:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:36:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 06:36:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=1602, Unknown=3, NotChecked=0, Total=2070 [2022-11-19 06:36:16,932 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:36:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:36:20,021 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-19 06:36:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:36:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 06:36:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:36:20,023 INFO L225 Difference]: With dead ends: 26 [2022-11-19 06:36:20,023 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 06:36:20,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=670, Invalid=2297, Unknown=3, NotChecked=0, Total=2970 [2022-11-19 06:36:20,026 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:36:20,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 34 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-11-19 06:36:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 06:36:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 06:36:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:36:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-11-19 06:36:20,036 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2022-11-19 06:36:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:36:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-11-19 06:36:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:36:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-11-19 06:36:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:36:20,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:36:20,038 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1] [2022-11-19 06:36:20,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:36:20,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:36:20,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:36:20,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:36:20,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:36:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:36:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash 142558665, now seen corresponding path program 4 times [2022-11-19 06:36:20,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:36:20,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779008546] [2022-11-19 06:36:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:36:20,647 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 06:36:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:36:20,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 06:36:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b311a75-6f71-4c6a-8fe4-a63d61bd6f23/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 (12)] Waiting until timeout for monitored process [2022-11-19 06:36:22,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:36:22,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:36:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 5162 conjuncts, 325 conjunts are in the unsatisfiable core [2022-11-19 06:36:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:13,028 WARN L233 SmtUtils]: Spent 49.24s on a formula simplification. DAG size of input: 160 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:37:41,629 WARN L233 SmtUtils]: Spent 28.28s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:45:27,501 WARN L233 SmtUtils]: Spent 7.63m on a formula simplification. DAG size of input: 549 DAG size of output: 461 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:46:22,548 WARN L233 SmtUtils]: Spent 47.25s on a formula simplification that was a NOOP. DAG size: 478 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)