./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9 --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 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 --- 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-6b4ec56 [2022-11-20 20:23:41,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:23:41,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:23:41,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:23:41,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:23:41,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:23:41,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:23:41,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:23:41,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:23:41,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:23:41,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:23:41,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:23:41,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:23:41,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:23:41,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:23:41,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:23:41,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:23:41,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:23:41,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:23:42,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:23:42,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:23:42,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:23:42,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:23:42,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:23:42,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:23:42,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:23:42,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:23:42,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:23:42,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:23:42,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:23:42,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:23:42,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:23:42,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:23:42,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:23:42,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:23:42,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:23:42,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:23:42,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:23:42,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:23:42,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:23:42,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:23:42,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:23:42,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:23:42,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:23:42,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:23:42,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:23:42,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:23:42,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:23:42,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:23:42,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:23:42,079 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:23:42,079 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:23:42,081 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:23:42,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:23:42,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:23:42,081 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:23:42,082 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:23:42,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:23:42,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:23:42,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:23:42,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:23:42,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:23:42,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:23:42,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:23:42,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:23:42,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:23:42,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:23:42,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:23:42,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:23:42,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:23:42,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:23:42,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:23:42,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:23:42,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:23:42,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:23:42,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:23:42,088 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:23:42,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:23:42,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:23:42,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:23:42,101 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 [2022-11-20 20:23:42,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:23:42,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:23:42,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:23:42,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:23:42,445 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:23:42,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:23:45,474 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:23:45,820 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:23:45,820 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:23:45,832 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/cd1d0ac32/a77923b844e34659a85f5f313aa475e3/FLAG9843f5e45 [2022-11-20 20:23:45,846 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/cd1d0ac32/a77923b844e34659a85f5f313aa475e3 [2022-11-20 20:23:45,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:23:45,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:23:45,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:23:45,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:23:45,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:23:45,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:23:45" (1/1) ... [2022-11-20 20:23:45,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0d1095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:45, skipping insertion in model container [2022-11-20 20:23:45,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:23:45" (1/1) ... [2022-11-20 20:23:45,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:23:45,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:23:46,100 WARN L237 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-20 20:23:46,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:23:46,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:23:46,299 WARN L237 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-20 20:23:46,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:23:46,473 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:23:46,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46 WrapperNode [2022-11-20 20:23:46,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:23:46,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:23:46,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:23:46,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:23:46,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,609 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 683 [2022-11-20 20:23:46,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:23:46,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:23:46,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:23:46,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:23:46,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:23:46,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:23:46,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:23:46,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:23:46,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (1/1) ... [2022-11-20 20:23:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:23:46,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:46,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:23:46,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:23:46,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:23:46,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:23:47,140 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:23:47,149 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:23:56,663 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:23:56,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:23:56,688 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:23:56,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:23:56 BoogieIcfgContainer [2022-11-20 20:23:56,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:23:56,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:23:56,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:23:56,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:23:56,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:23:45" (1/3) ... [2022-11-20 20:23:56,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b410cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:23:56, skipping insertion in model container [2022-11-20 20:23:56,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:23:46" (2/3) ... [2022-11-20 20:23:56,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b410cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:23:56, skipping insertion in model container [2022-11-20 20:23:56,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:23:56" (3/3) ... [2022-11-20 20:23:56,717 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:23:56,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:23:56,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:23:56,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:23:56,791 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;@76eaaf85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:23:56,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:23:56,795 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) [2022-11-20 20:23:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:23:56,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:56,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:23:56,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2022-11-20 20:23:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:23:56,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310913778] [2022-11-20 20:23:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:23:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:23:57,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:23:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:23:57,150 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:23:57,152 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:23:57,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:23:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:23:57,162 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 20:23:57,166 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:23:57,199 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-20 20:23:57,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:23:57 BoogieIcfgContainer [2022-11-20 20:23:57,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:23:57,214 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:23:57,214 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:23:57,214 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:23:57,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:23:56" (3/4) ... [2022-11-20 20:23:57,220 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 20:23:57,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:23:57,223 INFO L158 Benchmark]: Toolchain (without parser) took 11372.72ms. Allocated memory was 134.2MB in the beginning and 503.3MB in the end (delta: 369.1MB). Free memory was 102.8MB in the beginning and 315.4MB in the end (delta: -212.7MB). Peak memory consumption was 159.0MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,224 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:23:57,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 622.58ms. Allocated memory is still 134.2MB. Free memory was 102.3MB in the beginning and 76.0MB in the end (delta: 26.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,226 INFO L158 Benchmark]: Boogie Procedure Inliner took 135.02ms. Allocated memory is still 134.2MB. Free memory was 76.0MB in the beginning and 68.4MB in the end (delta: 7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,227 INFO L158 Benchmark]: Boogie Preprocessor took 118.29ms. Allocated memory is still 134.2MB. Free memory was 68.4MB in the beginning and 63.5MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,233 INFO L158 Benchmark]: RCFGBuilder took 9972.74ms. Allocated memory was 134.2MB in the beginning and 503.3MB in the end (delta: 369.1MB). Free memory was 63.5MB in the beginning and 338.5MB in the end (delta: -275.0MB). Peak memory consumption was 272.5MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,234 INFO L158 Benchmark]: TraceAbstraction took 506.80ms. Allocated memory is still 503.3MB. Free memory was 337.5MB in the beginning and 315.4MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,239 INFO L158 Benchmark]: Witness Printer took 7.83ms. Allocated memory is still 503.3MB. Free memory was 315.4MB in the beginning and 315.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:23:57,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 622.58ms. Allocated memory is still 134.2MB. Free memory was 102.3MB in the beginning and 76.0MB in the end (delta: 26.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 135.02ms. Allocated memory is still 134.2MB. Free memory was 76.0MB in the beginning and 68.4MB in the end (delta: 7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 118.29ms. Allocated memory is still 134.2MB. Free memory was 68.4MB in the beginning and 63.5MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 9972.74ms. Allocated memory was 134.2MB in the beginning and 503.3MB in the end (delta: 369.1MB). Free memory was 63.5MB in the beginning and 338.5MB in the end (delta: -275.0MB). Peak memory consumption was 272.5MB. Max. memory is 16.1GB. * TraceAbstraction took 506.80ms. Allocated memory is still 503.3MB. Free memory was 337.5MB in the beginning and 315.4MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 7.83ms. Allocated memory is still 503.3MB. Free memory was 315.4MB in the beginning and 315.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: 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 84, overapproximation of bitwiseAnd at line 89. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 32); [L29] const SORT_32 msb_SORT_32 = (SORT_32)1 << (32 - 1); [L31] const SORT_1 var_4 = 0; [L32] const SORT_1 var_10 = 1; [L33] const SORT_32 var_33 = 0; [L34] const SORT_32 var_39 = 2; [L35] const SORT_32 var_51 = 1; [L37] SORT_1 input_2; [L38] SORT_1 input_3; [L40] SORT_1 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L41] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L42] SORT_1 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L43] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_1 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_32 state_34 = __VERIFIER_nondet_uint() & mask_SORT_32; [L51] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L53] SORT_1 init_6_arg_1 = var_4; [L54] state_5 = init_6_arg_1 [L55] SORT_1 init_15_arg_1 = var_10; [L56] state_14 = init_15_arg_1 [L57] SORT_1 init_17_arg_1 = var_4; [L58] state_16 = init_17_arg_1 [L59] SORT_1 init_19_arg_1 = var_4; [L60] state_18 = init_19_arg_1 [L61] SORT_1 init_21_arg_1 = var_4; [L62] state_20 = init_21_arg_1 [L63] SORT_1 init_23_arg_1 = var_4; [L64] state_22 = init_23_arg_1 [L65] SORT_1 init_25_arg_1 = var_4; [L66] state_24 = init_25_arg_1 [L67] SORT_1 init_27_arg_1 = var_4; [L68] state_26 = init_27_arg_1 [L69] SORT_1 init_29_arg_1 = var_4; [L70] state_28 = init_29_arg_1 [L71] SORT_1 init_31_arg_1 = var_10; [L72] state_30 = init_31_arg_1 [L73] SORT_32 init_35_arg_1 = var_33; [L74] state_34 = init_35_arg_1 [L75] SORT_1 init_37_arg_1 = var_4; [L76] state_36 = init_37_arg_1 VAL [init_15_arg_1=1, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=1, init_35_arg_1=0, init_37_arg_1=0, init_6_arg_1=0, mask_SORT_1=1, mask_SORT_32=4294967295, msb_SORT_1=1, msb_SORT_32=2147483648, state_14=1, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=1, state_34=0, state_36=0, state_5=0, var_10=1, var_33=0, var_39=2, var_4=0, var_51=1] [L79] input_2 = __VERIFIER_nondet_uchar() [L80] input_3 = __VERIFIER_nondet_uchar() [L83] SORT_1 var_7_arg_0 = state_5; [L84] SORT_1 var_7 = ~var_7_arg_0; [L85] SORT_1 var_11_arg_0 = var_7; [L86] SORT_1 var_11 = ~var_11_arg_0; [L87] SORT_1 var_12_arg_0 = var_10; [L88] SORT_1 var_12_arg_1 = var_11; [L89] SORT_1 var_12 = var_12_arg_0 & var_12_arg_1; [L90] var_12 = var_12 & mask_SORT_1 [L91] SORT_1 bad_13_arg_0 = var_12; [L92] CALL __VERIFIER_assert(!(bad_13_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-20 20:23:57,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9 --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 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 --- 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-6b4ec56 [2022-11-20 20:24:00,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:24:00,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:24:00,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:24:00,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:24:00,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:24:00,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:24:00,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:24:00,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:24:00,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:24:00,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:24:00,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:24:00,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:24:00,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:24:00,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:24:00,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:24:00,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:24:00,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:24:00,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:24:00,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:24:00,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:24:00,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:24:00,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:24:00,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:24:00,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:24:00,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:24:00,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:24:00,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:24:00,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:24:00,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:24:00,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:24:00,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:24:00,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:24:00,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:24:00,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:24:00,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:24:00,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:24:00,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:24:00,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:24:00,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:24:00,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:24:00,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:24:00,262 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:24:00,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:24:00,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:24:00,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:24:00,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:24:00,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:24:00,264 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:24:00,264 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:24:00,264 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:24:00,265 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:24:00,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:24:00,265 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:24:00,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:24:00,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:24:00,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:24:00,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:24:00,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:24:00,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:24:00,267 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:24:00,267 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:24:00,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:24:00,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:24:00,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:24:00,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:24:00,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:24:00,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:24:00,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:00,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:24:00,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:24:00,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:24:00,274 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:24:00,274 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:00,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:24:00,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:24:00,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:24:00,275 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 [2022-11-20 20:24:00,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:24:00,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:24:00,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:24:00,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:24:00,744 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:24:00,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:24:04,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:24:04,590 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:24:04,591 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:24:04,606 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/f521bb8c6/a0461c46763e46b3bc348f0bf9a9116a/FLAGe5530415a [2022-11-20 20:24:04,627 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/data/f521bb8c6/a0461c46763e46b3bc348f0bf9a9116a [2022-11-20 20:24:04,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:24:04,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:24:04,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:04,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:24:04,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:24:04,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:04" (1/1) ... [2022-11-20 20:24:04,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe7164d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:04, skipping insertion in model container [2022-11-20 20:24:04,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:04" (1/1) ... [2022-11-20 20:24:04,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:24:04,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:24:04,902 WARN L237 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-20 20:24:05,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:05,103 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:24:05,117 WARN L237 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_de01abfe-3dad-4c35-836c-bc52d44d9cf0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-20 20:24:05,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:05,360 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:24:05,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05 WrapperNode [2022-11-20 20:24:05,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:05,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:05,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:24:05,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:24:05,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,510 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 683 [2022-11-20 20:24:05,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:05,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:24:05,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:24:05,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:24:05,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,617 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:24:05,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:24:05,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:24:05,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:24:05,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (1/1) ... [2022-11-20 20:24:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:05,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:24:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:24:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:24:05,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:24:06,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:24:06,164 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:24:07,171 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:24:07,179 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:24:07,180 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:24:07,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:07 BoogieIcfgContainer [2022-11-20 20:24:07,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:24:07,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:24:07,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:24:07,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:24:07,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:24:04" (1/3) ... [2022-11-20 20:24:07,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc6f4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:07, skipping insertion in model container [2022-11-20 20:24:07,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:05" (2/3) ... [2022-11-20 20:24:07,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc6f4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:07, skipping insertion in model container [2022-11-20 20:24:07,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:07" (3/3) ... [2022-11-20 20:24:07,193 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_state_machine.c [2022-11-20 20:24:07,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:24:07,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:24:07,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:24:07,298 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;@6638d17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:24:07,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:24:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:24:07,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:07,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:24:07,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 20:24:07,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207059585] [2022-11-20 20:24:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:07,336 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 [2022-11-20 20:24:07,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:07,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 20:24:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:24:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:07,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:07,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:07,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207059585] [2022-11-20 20:24:07,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207059585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:07,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:24:07,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:24:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243543658] [2022-11-20 20:24:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:07,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:24:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:07,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:24:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:24:07,774 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:07,928 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-20 20:24:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:24:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:24:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:07,942 INFO L225 Difference]: With dead ends: 20 [2022-11-20 20:24:07,944 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:24:07,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:24:07,957 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:07,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:24:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:24:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-20 20:24:07,996 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) [2022-11-20 20:24:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:24:07,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 20:24:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:08,001 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:24:08,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:24:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:24:08,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:08,003 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:08,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:08,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 20:24:08,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:08,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269765901] [2022-11-20 20:24:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:08,227 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 [2022-11-20 20:24:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:08,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 20:24:08,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 20:24:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:09,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269765901] [2022-11-20 20:24:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269765901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098754174] [2022-11-20 20:24:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:09,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:09,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:09,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:24:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:10,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 20:24:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:10,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:10,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098754174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836003726] [2022-11-20 20:24:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:10,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:10,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:24:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 20:24:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:11,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:11,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836003726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:11,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:11,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 11 [2022-11-20 20:24:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295069971] [2022-11-20 20:24:11,404 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:11,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:24:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:24:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:24:11,408 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-20 20:24:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:11,677 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-20 20:24:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:24:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:24:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:11,680 INFO L225 Difference]: With dead ends: 16 [2022-11-20 20:24:11,680 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 20:24:11,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:11,682 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:11,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-20 20:24:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 20:24:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-20 20:24:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-20 20:24:11,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-20 20:24:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:11,691 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-20 20:24:11,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-20 20:24:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-20 20:24:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:24:11,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:11,692 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:24:11,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:11,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:12,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:12,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-20 20:24:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:12,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350537777] [2022-11-20 20:24:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:12,305 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 [2022-11-20 20:24:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:12,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 20:24:12,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:24:12,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:12,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 20:24:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:13,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:14,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:14,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350537777] [2022-11-20 20:24:14,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350537777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198661002] [2022-11-20 20:24:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:14,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:14,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 20:24:15,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:15,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-20 20:24:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:16,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:21,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198661002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523096927] [2022-11-20 20:24:21,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:21,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:21,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:21,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:24:22,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:22,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 20:24:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:23,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:38,256 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 283 DAG size of output: 276 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:38,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523096927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:38,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 22 [2022-11-20 20:24:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498028456] [2022-11-20 20:24:38,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:24:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:24:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:24:38,474 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2022-11-20 20:24:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:39,051 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-20 20:24:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:24:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:24:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:39,058 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:24:39,058 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:24:39,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:24:39,060 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:39,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 20:24:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:24:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:24:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-11-20 20:24:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 20:24:39,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-20 20:24:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:39,068 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 20:24:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2022-11-20 20:24:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 20:24:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:24:39,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:39,069 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-20 20:24:39,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-20 20:24:39,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:24:39,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:39,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 20:24:39,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-20 20:24:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:39,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334066223] [2022-11-20 20:24:39,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:24:39,684 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 [2022-11-20 20:24:39,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:39,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 20:24:39,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 20:24:40,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:24:40,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:40,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 345 conjunts are in the unsatisfiable core [2022-11-20 20:24:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:51,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:04,114 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 515 DAG size of output: 498 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:25:40,340 WARN L233 SmtUtils]: Spent 21.56s on a formula simplification that was a NOOP. DAG size: 931 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:25:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:41,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:25:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334066223] [2022-11-20 20:25:41,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334066223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117223222] [2022-11-20 20:25:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:25:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:25:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:25:41,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:25:41,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-20 20:25:43,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:25:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:43,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 20:25:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:45,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:56,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117223222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:56,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596628929] [2022-11-20 20:25:56,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:25:56,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:56,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:56,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:25:57,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:25:57,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:57,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-20 20:25:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:26:00,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:51,527 WARN L233 SmtUtils]: Spent 32.43s on a formula simplification. DAG size of input: 193 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:26:51,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596628929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:51,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:26:51,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 33 [2022-11-20 20:26:51,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396811464] [2022-11-20 20:26:51,804 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:51,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 20:26:51,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:26:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 20:26:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=917, Unknown=12, NotChecked=0, Total=1056 [2022-11-20 20:26:51,807 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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) [2022-11-20 20:27:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:07,687 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-20 20:27:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:27:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 14 [2022-11-20 20:27:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:07,689 INFO L225 Difference]: With dead ends: 25 [2022-11-20 20:27:07,689 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 20:27:07,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 130.6s TimeCoverageRelationStatistics Valid=325, Invalid=1384, Unknown=13, NotChecked=0, Total=1722 [2022-11-20 20:27:07,691 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:07,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 63 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-20 20:27:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 20:27:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-20 20:27:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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) [2022-11-20 20:27:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-20 20:27:07,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-11-20 20:27:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:07,704 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-20 20:27:07,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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) [2022-11-20 20:27:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-20 20:27:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 20:27:07,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:07,705 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1] [2022-11-20 20:27:07,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:07,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:08,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:08,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash -826954269, now seen corresponding path program 4 times [2022-11-20 20:27:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:27:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310488951] [2022-11-20 20:27:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:27:08,315 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 [2022-11-20 20:27:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:27:08,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 20:27:08,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 20:27:09,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:27:09,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 574 conjunts are in the unsatisfiable core [2022-11-20 20:27:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:27:15,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:29:17,069 WARN L233 SmtUtils]: Spent 1.78m on a formula simplification. DAG size of input: 766 DAG size of output: 375 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:35:36,426 WARN L233 SmtUtils]: Spent 5.93m on a formula simplification. DAG size of input: 1037 DAG size of output: 882 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:35:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:35:38,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:35:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310488951] [2022-11-20 20:35:38,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310488951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:35:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [259712189] [2022-11-20 20:35:38,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:35:38,290 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:35:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:35:38,294 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:35:38,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-20 20:35:40,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:35:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:35:40,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 468 conjunts are in the unsatisfiable core [2022-11-20 20:35:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:35:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:35:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:36:24,478 WARN L233 SmtUtils]: Spent 12.84s on a formula simplification. DAG size of input: 715 DAG size of output: 490 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:37:28,107 WARN L233 SmtUtils]: Spent 40.38s on a formula simplification. DAG size of input: 1007 DAG size of output: 492 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:37:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:37:28,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [259712189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:37:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821522333] [2022-11-20 20:37:28,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:37:28,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:37:28,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:37:28,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:37:28,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de01abfe-3dad-4c35-836c-bc52d44d9cf0/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:37:29,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:37:29,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:37:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 592 conjunts are in the unsatisfiable core [2022-11-20 20:37:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:37:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:37:38,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:24,514 WARN L233 SmtUtils]: Spent 25.44s on a formula simplification. DAG size of input: 581 DAG size of output: 457 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:38:34,637 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 460 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)