./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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 0040318bb7d5d70cc95d7fb363d250bf2184336e92628a243777c547e7400e43 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:42:58,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:42:58,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:42:58,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:42:58,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:42:58,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:42:58,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:42:58,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:42:58,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:42:58,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:42:58,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:42:58,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:42:58,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:42:58,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:42:58,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:42:58,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:42:58,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:42:58,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:42:58,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:42:58,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:42:58,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:42:58,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:42:58,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:42:58,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:42:58,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:42:58,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:42:58,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:42:58,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:42:58,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:42:58,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:42:58,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:42:58,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:42:58,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:42:58,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:42:58,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:42:58,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:42:58,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:42:58,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:42:58,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:42:58,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:42:58,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:42:58,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:42:58,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:42:58,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:42:58,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:42:58,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:42:58,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:42:58,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:42:58,301 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:42:58,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:42:58,302 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:42:58,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:42:58,302 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:42:58,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:42:58,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:42:58,303 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:42:58,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:42:58,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:42:58,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:42:58,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:42:58,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:42:58,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:42:58,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:42:58,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:42:58,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:42:58,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:42:58,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:42:58,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:42:58,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:42:58,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:42:58,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:42:58,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:42:58,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:42:58,310 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:42:58,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:42:58,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:42:58,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:42:58,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:42:58,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:42:58,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:42:58,312 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0040318bb7d5d70cc95d7fb363d250bf2184336e92628a243777c547e7400e43 [2022-11-19 07:42:58,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:42:58,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:42:58,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:42:58,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:42:58,635 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:42:58,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c [2022-11-19 07:42:58,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/ab7c1575b/df388032a44c463cb7169a8afb802219/FLAG56a580a7a [2022-11-19 07:42:59,307 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:42:59,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c [2022-11-19 07:42:59,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/ab7c1575b/df388032a44c463cb7169a8afb802219/FLAG56a580a7a [2022-11-19 07:42:59,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/ab7c1575b/df388032a44c463cb7169a8afb802219 [2022-11-19 07:42:59,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:42:59,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:42:59,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:42:59,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:42:59,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:42:59,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:59" (1/1) ... [2022-11-19 07:42:59,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a5773e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:59, skipping insertion in model container [2022-11-19 07:42:59,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:59" (1/1) ... [2022-11-19 07:42:59,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:42:59,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:42:59,928 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c[1117,1130] [2022-11-19 07:42:59,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:42:59,975 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:42:59,986 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c[1117,1130] [2022-11-19 07:43:00,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:43:00,019 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:43:00,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00 WrapperNode [2022-11-19 07:43:00,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:43:00,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:00,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:43:00,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:43:00,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,062 INFO L138 Inliner]: procedures = 11, calls = 4, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2022-11-19 07:43:00,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:00,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:43:00,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:43:00,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:43:00,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:43:00,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:43:00,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:43:00,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:43:00,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (1/1) ... [2022-11-19 07:43:00,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:43:00,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:00,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:43:00,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:43:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:43:00,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:43:00,277 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:43:00,279 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:43:00,520 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:43:00,797 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:43:00,798 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:43:00,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:00 BoogieIcfgContainer [2022-11-19 07:43:00,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:43:00,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:43:00,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:43:00,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:43:00,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:59" (1/3) ... [2022-11-19 07:43:00,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2460580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:00, skipping insertion in model container [2022-11-19 07:43:00,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:00" (2/3) ... [2022-11-19 07:43:00,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2460580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:00, skipping insertion in model container [2022-11-19 07:43:00,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:00" (3/3) ... [2022-11-19 07:43:00,811 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.twocount2c.c [2022-11-19 07:43:00,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:43:00,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:43:00,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:43:00,891 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;@24711f2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:43:00,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:43:00,895 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 07:43:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:43:00,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:00,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:43:00,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 4304575, now seen corresponding path program 1 times [2022-11-19 07:43:00,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:00,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550977283] [2022-11-19 07:43:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:01,810 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 07:43:01,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:01,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550977283] [2022-11-19 07:43:01,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550977283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:01,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:43:01,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:43:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115904157] [2022-11-19 07:43:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:43:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:43:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:43:01,850 INFO L87 Difference]: Start difference. First 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 07:43:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:01,912 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-19 07:43:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:43:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-19 07:43:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:01,922 INFO L225 Difference]: With dead ends: 15 [2022-11-19 07:43:01,922 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 07:43:01,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:43:01,929 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:01,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:43:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 07:43:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-19 07:43:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 07:43:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-19 07:43:01,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-19 07:43:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:01,963 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-19 07:43:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 07:43:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-19 07:43:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:43:01,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:01,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 07:43:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:43:01,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -604439290, now seen corresponding path program 1 times [2022-11-19 07:43:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:01,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217746551] [2022-11-19 07:43:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:43:02,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:43:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:43:02,248 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:43:02,248 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:43:02,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:43:02,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:43:02,259 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 07:43:02,263 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:43:02,287 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:43:02,287 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:43:02,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:43:02 BoogieIcfgContainer [2022-11-19 07:43:02,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:43:02,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:43:02,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:43:02,298 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:43:02,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:00" (3/4) ... [2022-11-19 07:43:02,302 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:43:02,302 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:43:02,303 INFO L158 Benchmark]: Toolchain (without parser) took 2654.64ms. Allocated memory is still 151.0MB. Free memory was 118.7MB in the beginning and 102.5MB in the end (delta: 16.2MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2022-11-19 07:43:02,304 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory was 50.2MB in the beginning and 50.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:43:02,304 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.78ms. Allocated memory is still 151.0MB. Free memory was 118.7MB in the beginning and 126.8MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:43:02,305 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.45ms. Allocated memory is still 151.0MB. Free memory was 126.8MB in the beginning and 124.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:43:02,305 INFO L158 Benchmark]: Boogie Preprocessor took 28.73ms. Allocated memory is still 151.0MB. Free memory was 124.8MB in the beginning and 123.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:43:02,306 INFO L158 Benchmark]: RCFGBuilder took 708.34ms. Allocated memory is still 151.0MB. Free memory was 123.3MB in the beginning and 94.3MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-19 07:43:02,307 INFO L158 Benchmark]: TraceAbstraction took 1493.45ms. Allocated memory is still 151.0MB. Free memory was 93.3MB in the beginning and 103.5MB in the end (delta: -10.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:43:02,307 INFO L158 Benchmark]: Witness Printer took 5.02ms. Allocated memory is still 151.0MB. Free memory was 103.5MB in the beginning and 102.5MB in the end (delta: 965.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:43:02,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory was 50.2MB in the beginning and 50.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 365.78ms. Allocated memory is still 151.0MB. Free memory was 118.7MB in the beginning and 126.8MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.45ms. Allocated memory is still 151.0MB. Free memory was 126.8MB in the beginning and 124.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.73ms. Allocated memory is still 151.0MB. Free memory was 124.8MB in the beginning and 123.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 708.34ms. Allocated memory is still 151.0MB. Free memory was 123.3MB in the beginning and 94.3MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1493.45ms. Allocated memory is still 151.0MB. Free memory was 93.3MB in the beginning and 103.5MB in the end (delta: -10.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.02ms. Allocated memory is still 151.0MB. Free memory was 103.5MB in the beginning and 102.5MB in the end (delta: 965.9kB). 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: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 55, overapproximation of bitwiseAnd at line 49. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 2); [L30] const SORT_2 msb_SORT_2 = (SORT_2)1 << (2 - 1); [L32] const SORT_2 var_5 = 0; [L33] const SORT_2 var_10 = 1; [L34] const SORT_2 var_17 = mask_SORT_2; [L36] SORT_1 input_3; [L37] SORT_1 input_4; [L39] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L40] SORT_2 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L42] SORT_2 init_8_arg_1 = var_5; [L43] state_6 = init_8_arg_1 [L44] SORT_2 init_9_arg_1 = var_5; [L45] state_7 = init_9_arg_1 VAL [init_8_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, state_6=0, state_7=0, var_10=1, var_17=3, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=1, input_4=1, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=3, next_16_arg_1=3, state_6=3, state_7=3, var_10=1, var_11=1, var_11_arg_0=0, var_11_arg_1=1, var_12=1, var_12_arg_0=0, var_12_arg_1=1, var_13=3, var_13_arg_0=1, var_13_arg_1=1, var_13_arg_2=0, var_14=3, var_14_arg_0=1, var_14_arg_1=1, var_14_arg_2=0, var_17=3, var_18=0, var_18_arg_0=0, var_18_arg_1=3, var_19=0, var_19_arg_0=0, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=1, var_22_arg_1=1, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] 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: 1.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 2 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=1, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 07:43:02,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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 0040318bb7d5d70cc95d7fb363d250bf2184336e92628a243777c547e7400e43 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:43:04,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:43:04,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:43:04,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:43:04,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:43:04,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:43:04,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:43:04,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:43:04,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:43:04,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:43:04,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:43:04,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:43:04,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:43:04,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:43:04,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:43:04,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:43:04,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:43:04,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:43:04,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:43:04,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:43:04,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:43:04,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:43:04,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:43:04,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:43:04,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:43:04,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:43:04,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:43:04,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:43:04,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:43:04,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:43:04,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:43:04,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:43:04,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:43:04,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:43:04,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:43:04,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:43:04,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:43:04,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:43:04,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:43:04,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:43:04,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:43:04,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 07:43:04,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:43:04,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:43:04,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:43:05,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:43:05,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:43:05,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:43:05,001 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:43:05,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:43:05,002 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:43:05,002 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:43:05,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:43:05,002 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:43:05,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:43:05,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:43:05,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:43:05,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:43:05,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:43:05,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:43:05,005 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:43:05,005 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:43:05,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:43:05,006 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:43:05,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:43:05,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:43:05,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:43:05,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:43:05,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:43:05,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:43:05,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:43:05,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:43:05,008 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:43:05,008 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:43:05,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:43:05,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:43:05,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:43:05,009 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0040318bb7d5d70cc95d7fb363d250bf2184336e92628a243777c547e7400e43 [2022-11-19 07:43:05,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:43:05,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:43:05,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:43:05,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:43:05,402 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:43:05,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c [2022-11-19 07:43:05,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/b5f9aff4f/e325212048464a1c997618e18426ba2f/FLAG60d08c3ab [2022-11-19 07:43:06,067 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:43:06,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c [2022-11-19 07:43:06,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/b5f9aff4f/e325212048464a1c997618e18426ba2f/FLAG60d08c3ab [2022-11-19 07:43:06,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/data/b5f9aff4f/e325212048464a1c997618e18426ba2f [2022-11-19 07:43:06,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:43:06,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:43:06,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:43:06,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:43:06,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:43:06,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ead5d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06, skipping insertion in model container [2022-11-19 07:43:06,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:43:06,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:43:06,629 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c[1117,1130] [2022-11-19 07:43:06,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:43:06,710 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:43:06,743 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_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount2c.c[1117,1130] [2022-11-19 07:43:06,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:43:06,814 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:43:06,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06 WrapperNode [2022-11-19 07:43:06,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:43:06,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:06,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:43:06,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:43:06,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,868 INFO L138 Inliner]: procedures = 11, calls = 4, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-11-19 07:43:06,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:06,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:43:06,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:43:06,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:43:06,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:43:06,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:43:06,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:43:06,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:43:06,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (1/1) ... [2022-11-19 07:43:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:43:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:06,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:43:06,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:43:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:43:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:43:07,118 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:43:07,120 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:43:07,380 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:43:07,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:43:07,400 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:43:07,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:07 BoogieIcfgContainer [2022-11-19 07:43:07,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:43:07,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:43:07,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:43:07,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:43:07,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:43:06" (1/3) ... [2022-11-19 07:43:07,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eff433f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:07, skipping insertion in model container [2022-11-19 07:43:07,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:06" (2/3) ... [2022-11-19 07:43:07,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eff433f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:07, skipping insertion in model container [2022-11-19 07:43:07,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:07" (3/3) ... [2022-11-19 07:43:07,417 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.twocount2c.c [2022-11-19 07:43:07,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:43:07,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:43:07,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:43:07,530 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;@1d0bfe9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:43:07,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:43:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 07:43:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:43:07,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:07,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:07,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1809708109, now seen corresponding path program 1 times [2022-11-19 07:43:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:07,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146483545] [2022-11-19 07:43:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:07,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:07,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:43:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:43:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:07,715 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 07:43:07,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:07,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:43:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146483545] [2022-11-19 07:43:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146483545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:07,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:43:07,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:43:07,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270699996] [2022-11-19 07:43:07,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:07,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:43:07,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:43:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:43:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:43:07,797 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 07:43:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:07,834 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-19 07:43:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:43:07,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-19 07:43:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:07,844 INFO L225 Difference]: With dead ends: 20 [2022-11-19 07:43:07,846 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 07:43:07,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:43:07,859 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:43:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 07:43:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 07:43:07,888 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 07:43:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-19 07:43:07,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2022-11-19 07:43:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:07,891 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-19 07:43:07,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 07:43:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-19 07:43:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:43:07,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:07,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:07,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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)] Ended with exit code 0 [2022-11-19 07:43:08,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:08,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1809767691, now seen corresponding path program 1 times [2022-11-19 07:43:08,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692106549] [2022-11-19 07:43:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:08,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:08,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:08,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:43:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:43:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:08,413 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 07:43:08,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:08,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:43:08,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692106549] [2022-11-19 07:43:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692106549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:08,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:43:08,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:43:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37693048] [2022-11-19 07:43:08,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:43:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:43:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:43:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:43:08,420 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 07:43:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:08,479 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-11-19 07:43:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:43:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-19 07:43:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:08,482 INFO L225 Difference]: With dead ends: 19 [2022-11-19 07:43:08,482 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:43:08,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:43:08,484 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:08,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:43:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:43:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2022-11-19 07:43:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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 07:43:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-19 07:43:08,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2022-11-19 07:43:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:08,493 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-19 07:43:08,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 07:43:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-19 07:43:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:43:08,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:08,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:08,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:08,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1841040349, now seen corresponding path program 1 times [2022-11-19 07:43:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:08,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19037133] [2022-11-19 07:43:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:08,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:08,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:08,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:43:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:43:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:09,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:09,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:43:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19037133] [2022-11-19 07:43:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19037133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:09,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126316297] [2022-11-19 07:43:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:43:09,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:43:09,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:43:09,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-19 07:43:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:43:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126316297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:10,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975529482] [2022-11-19 07:43:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:10,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:10,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:43:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:10,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:43:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:10,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:10,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975529482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:10,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:43:10,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 14 [2022-11-19 07:43:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060323241] [2022-11-19 07:43:10,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:43:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:43:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:43:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:43:10,982 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 07:43:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:11,177 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-11-19 07:43:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:43:11,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 12 [2022-11-19 07:43:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:11,179 INFO L225 Difference]: With dead ends: 24 [2022-11-19 07:43:11,179 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:43:11,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:43:11,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:11,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-19 07:43:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:43:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2022-11-19 07:43:11,187 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 07:43:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-19 07:43:11,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-11-19 07:43:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:11,189 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-19 07:43:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 07:43:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-19 07:43:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:43:11,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:11,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:43:11,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:11,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:11,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:11,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:11,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash 191466507, now seen corresponding path program 2 times [2022-11-19 07:43:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658238296] [2022-11-19 07:43:11,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:43:11,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:11,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:11,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:11,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 07:43:11,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:43:11,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:11,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:43:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:12,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:43:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658238296] [2022-11-19 07:43:12,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658238296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [461590109] [2022-11-19 07:43:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:43:12,906 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:43:12,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:43:12,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:43:12,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-19 07:43:13,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:43:13,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:43:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:13,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:13,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [461590109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:13,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416197780] [2022-11-19 07:43:13,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:43:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:13,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:13,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:13,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:43:13,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:43:13,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:43:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:14,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:14,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416197780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:14,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:43:14,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 18 [2022-11-19 07:43:14,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105676360] [2022-11-19 07:43:14,980 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:14,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:43:14,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:43:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:43:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:43:14,982 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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 07:43:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:15,232 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-11-19 07:43:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:43:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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 07:43:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:15,235 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:43:15,235 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 07:43:15,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:43:15,236 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 53 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 07:43:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 07:43:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-11-19 07:43:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 07:43:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-11-19 07:43:15,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2022-11-19 07:43:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:15,246 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-11-19 07:43:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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 07:43:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-11-19 07:43:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:43:15,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:15,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:43:15,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:43:15,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:15,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:15,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1190222557, now seen corresponding path program 3 times [2022-11-19 07:43:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:15,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075178463] [2022-11-19 07:43:15,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:43:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:15,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:15,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:43:15,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:43:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:15,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-19 07:43:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:18,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:24,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:43:24,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075178463] [2022-11-19 07:43:24,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075178463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583683622] [2022-11-19 07:43:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:43:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:43:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:43:24,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:43:24,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-19 07:43:25,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:43:25,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:25,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-19 07:43:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:31,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583683622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718558538] [2022-11-19 07:43:31,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:43:31,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:31,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:31,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:43:31,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:43:31,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:31,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 07:43:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:34,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718558538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:40,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:43:40,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 14, 14] total 45 [2022-11-19 07:43:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569567434] [2022-11-19 07:43:40,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:43:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:43:40,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:43:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:43:40,792 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 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 07:43:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:42,747 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-11-19 07:43:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:43:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 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 22 [2022-11-19 07:43:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:42,749 INFO L225 Difference]: With dead ends: 30 [2022-11-19 07:43:42,749 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 07:43:42,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:43:42,752 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:42,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-11-19 07:43:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 07:43:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 07:43:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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 07:43:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-11-19 07:43:42,759 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2022-11-19 07:43:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:42,759 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-11-19 07:43:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 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 07:43:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-11-19 07:43:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:43:42,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:42,761 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 07:43:42,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:43:42,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:43,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:43,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:43:43,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1666876661, now seen corresponding path program 4 times [2022-11-19 07:43:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:43:43,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040718723] [2022-11-19 07:43:43,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:43:43,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:43:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:43:43,370 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:43:43,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:43:43,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:43:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:43,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-19 07:43:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:43:51,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:27,205 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 622 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:44:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:41,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:44:41,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040718723] [2022-11-19 07:44:41,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040718723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:41,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453062483] [2022-11-19 07:44:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:44:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:44:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:44:41,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:44:41,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-19 07:44:41,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:44:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:41,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-19 07:44:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:48,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:13,890 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 635 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:45:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:45:32,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453062483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:32,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223655753] [2022-11-19 07:45:32,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:45:32,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:32,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:32,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:45:32,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:45:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:32,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-19 07:45:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:45:36,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:12,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223655753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:12,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:46:12,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16, 16, 17, 17] total 43 [2022-11-19 07:46:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126601546] [2022-11-19 07:46:12,472 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:12,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:46:12,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:46:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:46:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1304, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:46:12,475 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 07:46:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:14,843 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-19 07:46:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:46:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 27 [2022-11-19 07:46:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:14,845 INFO L225 Difference]: With dead ends: 40 [2022-11-19 07:46:14,845 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 07:46:14,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=723, Invalid=1827, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:46:14,847 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:14,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-11-19 07:46:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 07:46:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-19 07:46:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 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 07:46:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-11-19 07:46:14,859 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 27 [2022-11-19 07:46:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:14,859 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-11-19 07:46:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 07:46:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-11-19 07:46:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:46:14,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:14,861 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1] [2022-11-19 07:46:14,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:15,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:15,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:15,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:15,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1560106485, now seen corresponding path program 5 times [2022-11-19 07:46:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:46:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720916016] [2022-11-19 07:46:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:46:15,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:46:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:46:15,477 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:46:15,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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 (16)] Waiting until timeout for monitored process [2022-11-19 07:46:15,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-19 07:46:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-19 07:46:15,602 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:46:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:46:15,807 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-19 07:46:15,807 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:46:15,809 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:46:15,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/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 (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:46:16,028 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2022-11-19 07:46:16,032 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:46:16,114 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,115 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,115 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,115 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,115 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,116 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,116 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:46:16 BoogieIcfgContainer [2022-11-19 07:46:16,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:46:16,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:46:16,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:46:16,148 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:46:16,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:07" (3/4) ... [2022-11-19 07:46:16,151 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:46:16,176 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,180 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,184 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,185 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,185 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,185 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,185 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 07:46:16,288 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:46:16,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:46:16,289 INFO L158 Benchmark]: Toolchain (without parser) took 189899.34ms. Allocated memory was 67.1MB in the beginning and 589.3MB in the end (delta: 522.2MB). Free memory was 48.5MB in the beginning and 331.1MB in the end (delta: -282.5MB). Peak memory consumption was 240.3MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,290 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory was 48.7MB in the beginning and 48.6MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:46:16,290 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.55ms. Allocated memory is still 67.1MB. Free memory was 48.4MB in the beginning and 49.4MB in the end (delta: -1.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,290 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.44ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 47.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:46:16,291 INFO L158 Benchmark]: Boogie Preprocessor took 53.04ms. Allocated memory is still 67.1MB. Free memory was 47.5MB in the beginning and 46.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,291 INFO L158 Benchmark]: RCFGBuilder took 480.33ms. Allocated memory is still 67.1MB. Free memory was 46.3MB in the beginning and 34.8MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,292 INFO L158 Benchmark]: TraceAbstraction took 188741.33ms. Allocated memory was 67.1MB in the beginning and 589.3MB in the end (delta: 522.2MB). Free memory was 34.1MB in the beginning and 339.4MB in the end (delta: -305.4MB). Peak memory consumption was 218.3MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,292 INFO L158 Benchmark]: Witness Printer took 141.12ms. Allocated memory is still 589.3MB. Free memory was 339.4MB in the beginning and 331.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:46:16,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory was 48.7MB in the beginning and 48.6MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.55ms. Allocated memory is still 67.1MB. Free memory was 48.4MB in the beginning and 49.4MB in the end (delta: -1.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.44ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 47.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.04ms. Allocated memory is still 67.1MB. Free memory was 47.5MB in the beginning and 46.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 480.33ms. Allocated memory is still 67.1MB. Free memory was 46.3MB in the beginning and 34.8MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 188741.33ms. Allocated memory was 67.1MB in the beginning and 589.3MB in the end (delta: 522.2MB). Free memory was 34.1MB in the beginning and 339.4MB in the end (delta: -305.4MB). Peak memory consumption was 218.3MB. Max. memory is 16.1GB. * Witness Printer took 141.12ms. Allocated memory is still 589.3MB. Free memory was 339.4MB in the beginning and 331.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 21]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 2); [L30] const SORT_2 msb_SORT_2 = (SORT_2)1 << (2 - 1); [L32] const SORT_2 var_5 = 0; [L33] const SORT_2 var_10 = 1; [L34] const SORT_2 var_17 = mask_SORT_2; [L36] SORT_1 input_3; [L37] SORT_1 input_4; [L39] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L40] SORT_2 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L42] SORT_2 init_8_arg_1 = var_5; [L43] state_6 = init_8_arg_1 [L44] SORT_2 init_9_arg_1 = var_5; [L45] state_7 = init_9_arg_1 VAL [init_8_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, state_6=0, state_7=0, var_10=1, var_17=3, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=0, input_4=1, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=0, next_16_arg_1=1, state_6=0, state_7=1, var_10=1, var_11=1, var_11_arg_0=0, var_11_arg_1=1, var_12=1, var_12_arg_0=0, var_12_arg_1=1, var_13=0, var_13_arg_0=0, var_13_arg_1=1, var_13_arg_2=0, var_14=1, var_14_arg_0=1, var_14_arg_1=1, var_14_arg_2=0, var_17=3, var_18=0, var_18_arg_0=0, var_18_arg_1=3, var_19=0, var_19_arg_0=0, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=0, var_22_arg_1=1, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=1, input_4=0, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=1, next_16_arg_1=1, state_6=1, state_7=1, var_10=1, var_11=1, var_11_arg_0=0, var_11_arg_1=1, var_12=2, var_12_arg_0=1, var_12_arg_1=1, var_13=1, var_13_arg_0=1, var_13_arg_1=1, var_13_arg_2=0, var_14=1, var_14_arg_0=0, var_14_arg_1=2, var_14_arg_2=1, var_17=3, var_18=0, var_18_arg_0=0, var_18_arg_1=3, var_19=0, var_19_arg_0=1, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=1, var_22_arg_1=0, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=1, input_4=0, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=2, next_16_arg_1=1, state_6=2, state_7=1, var_10=1, var_11=2, var_11_arg_0=1, var_11_arg_1=1, var_12=2, var_12_arg_0=1, var_12_arg_1=1, var_13=2, var_13_arg_0=1, var_13_arg_1=2, var_13_arg_2=1, var_14=1, var_14_arg_0=0, var_14_arg_1=2, var_14_arg_2=1, var_17=3, var_18=0, var_18_arg_0=1, var_18_arg_1=3, var_19=0, var_19_arg_0=1, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=1, var_22_arg_1=0, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=0, input_4=1, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=2, next_16_arg_1=2, state_6=2, state_7=2, var_10=1, var_11=3, var_11_arg_0=2, var_11_arg_1=1, var_12=2, var_12_arg_0=1, var_12_arg_1=1, var_13=2, var_13_arg_0=0, var_13_arg_1=3, var_13_arg_2=2, var_14=2, var_14_arg_0=1, var_14_arg_1=2, var_14_arg_2=1, var_17=3, var_18=0, var_18_arg_0=2, var_18_arg_1=3, var_19=0, var_19_arg_0=1, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=0, var_22_arg_1=1, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=1, input_4=0, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=3, next_16_arg_1=2, state_6=3, state_7=2, var_10=1, var_11=3, var_11_arg_0=2, var_11_arg_1=1, var_12=3, var_12_arg_0=2, var_12_arg_1=1, var_13=3, var_13_arg_0=1, var_13_arg_1=3, var_13_arg_2=2, var_14=2, var_14_arg_0=0, var_14_arg_1=3, var_14_arg_2=2, var_17=3, var_18=0, var_18_arg_0=2, var_18_arg_1=3, var_19=0, var_19_arg_0=2, var_19_arg_1=3, var_20=0, var_20_arg_0=0, var_20_arg_1=0, var_22=1, var_22_arg_0=1, var_22_arg_1=0, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L71] RET __VERIFIER_assert(!(bad_21_arg_0)) [L73] SORT_2 var_11_arg_0 = state_6; [L74] SORT_2 var_11_arg_1 = var_10; [L75] SORT_2 var_11 = var_11_arg_0 + var_11_arg_1; [L76] SORT_1 var_13_arg_0 = input_3; [L77] SORT_2 var_13_arg_1 = var_11; [L78] SORT_2 var_13_arg_2 = state_6; [L79] SORT_2 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L80] var_13 = var_13 & mask_SORT_2 [L81] SORT_2 next_15_arg_1 = var_13; [L82] SORT_2 var_12_arg_0 = state_7; [L83] SORT_2 var_12_arg_1 = var_10; [L84] SORT_2 var_12 = var_12_arg_0 + var_12_arg_1; [L85] SORT_1 var_14_arg_0 = input_4; [L86] SORT_2 var_14_arg_1 = var_12; [L87] SORT_2 var_14_arg_2 = state_7; [L88] SORT_2 var_14 = var_14_arg_0 ? var_14_arg_1 : var_14_arg_2; [L89] var_14 = var_14 & mask_SORT_2 [L90] SORT_2 next_16_arg_1 = var_14; [L92] state_6 = next_15_arg_1 [L93] state_7 = next_16_arg_1 VAL [bad_21_arg_0=0, constr_23_arg_0=1, init_8_arg_1=0, init_9_arg_1=0, input_3=0, input_4=1, mask_SORT_1=1, mask_SORT_2=3, msb_SORT_1=1, msb_SORT_2=2, next_15_arg_1=3, next_16_arg_1=3, state_6=3, state_7=3, var_10=1, var_11=4, var_11_arg_0=3, var_11_arg_1=1, var_12=3, var_12_arg_0=2, var_12_arg_1=1, var_13=3, var_13_arg_0=0, var_13_arg_1=4, var_13_arg_2=3, var_14=3, var_14_arg_0=1, var_14_arg_1=3, var_14_arg_2=2, var_17=3, var_18=1, var_18_arg_0=3, var_18_arg_1=3, var_19=0, var_19_arg_0=2, var_19_arg_1=3, var_20=0, var_20_arg_0=1, var_20_arg_1=0, var_22=1, var_22_arg_0=0, var_22_arg_1=1, var_5=0] [L48] input_3 = __VERIFIER_nondet_uchar() [L49] input_3 = input_3 & mask_SORT_1 [L50] input_4 = __VERIFIER_nondet_uchar() [L51] input_4 = input_4 & mask_SORT_1 [L53] SORT_1 var_22_arg_0 = input_3; [L54] SORT_1 var_22_arg_1 = input_4; [L55] SORT_1 var_22 = ~(var_22_arg_0 & var_22_arg_1); [L56] var_22 = var_22 & mask_SORT_1 [L57] SORT_1 constr_23_arg_0 = var_22; [L58] CALL assume_abort_if_not(constr_23_arg_0) [L22] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L58] RET assume_abort_if_not(constr_23_arg_0) [L60] SORT_2 var_18_arg_0 = state_6; [L61] SORT_2 var_18_arg_1 = var_17; [L62] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L63] SORT_2 var_19_arg_0 = state_7; [L64] SORT_2 var_19_arg_1 = var_17; [L65] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L66] SORT_1 var_20_arg_0 = var_18; [L67] SORT_1 var_20_arg_1 = var_19; [L68] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L69] var_20 = var_20 & mask_SORT_1 [L70] SORT_1 bad_21_arg_0 = var_20; [L71] CALL __VERIFIER_assert(!(bad_21_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 188.5s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 93 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 207 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 150 IncrementalHoareTripleChecker+Unchecked, 170 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 37 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 486 GetRequests, 325 SyntacticMatches, 21 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3461 ImplicationChecksByTransitivity, 56.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=6, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 178.3s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 456 ConstructedInterpolants, 240 QuantifiedInterpolants, 186046 SizeOfPredicates, 809 NumberOfNonLiveVariables, 1718 ConjunctsInSsa, 840 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 0/540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:46:16,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f5846f2-9aa6-4424-9ea2-c424e09ebeb8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE