./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 54eceae7382bc15f3f6868c637e60b7eb166af5d1c4b040a6f157b03b87c995c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:32:25,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:32:25,706 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 13:32:25,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:32:25,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:32:25,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:32:25,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:32:25,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:32:25,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:32:25,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:32:25,738 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:32:25,738 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:32:25,739 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:32:25,739 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:32:25,740 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:32:25,740 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:32:25,741 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:32:25,741 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:32:25,742 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:32:25,742 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:32:25,743 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:32:25,746 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:32:25,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:32:25,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:32:25,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:32:25,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:32:25,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:32:25,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:32:25,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:32:25,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:32:25,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:32:25,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:32:25,750 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:32:25,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:32:25,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:25,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:32:25,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:32:25,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:32:25,752 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:32:25,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:32:25,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:32:25,752 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:32:25,753 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:32:25,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:32:25,753 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54eceae7382bc15f3f6868c637e60b7eb166af5d1c4b040a6f157b03b87c995c [2023-12-02 13:32:25,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:32:26,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:32:26,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:32:26,016 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:32:26,016 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:32:26,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:28,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:32:28,927 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:32:28,927 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:28,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/afdc6b20e/d17b940627d94d32ab3fcb7e7d2d1af2/FLAG772542092 [2023-12-02 13:32:28,947 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/afdc6b20e/d17b940627d94d32ab3fcb7e7d2d1af2 [2023-12-02 13:32:28,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:32:28,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:32:28,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:28,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:32:28,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:32:28,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:28" (1/1) ... [2023-12-02 13:32:28,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63286a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:28, skipping insertion in model container [2023-12-02 13:32:28,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:28" (1/1) ... [2023-12-02 13:32:28,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:32:29,111 WARN L240 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1263,1276] [2023-12-02 13:32:29,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:29,185 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:32:29,193 WARN L240 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1263,1276] [2023-12-02 13:32:29,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:29,249 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:32:29,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29 WrapperNode [2023-12-02 13:32:29,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:29,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:29,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:32:29,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:32:29,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,324 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 302 [2023-12-02 13:32:29,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:29,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:32:29,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:32:29,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:32:29,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,375 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:32:29,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:32:29,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:32:29,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:32:29,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (1/1) ... [2023-12-02 13:32:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:29,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:29,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:32:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:32:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:32:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:32:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:32:29,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:32:29,584 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:32:29,586 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:32:29,938 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:32:30,220 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:32:30,221 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:32:30,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:30 BoogieIcfgContainer [2023-12-02 13:32:30,223 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:32:30,225 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:32:30,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:32:30,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:32:30,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:32:28" (1/3) ... [2023-12-02 13:32:30,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2aebcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:30, skipping insertion in model container [2023-12-02 13:32:30,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:29" (2/3) ... [2023-12-02 13:32:30,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2aebcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:30, skipping insertion in model container [2023-12-02 13:32:30,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:30" (3/3) ... [2023-12-02 13:32:30,231 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:30,246 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:32:30,246 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:32:30,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:32:30,292 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=LoopHeads, 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;@11715dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:32:30,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:32:30,296 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) [2023-12-02 13:32:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:32:30,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:30,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:32:30,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:30,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 7304016, now seen corresponding path program 1 times [2023-12-02 13:32:30,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:30,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322700791] [2023-12-02 13:32:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:32:30,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:32:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:32:30,565 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:32:30,566 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:32:30,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 13:32:30,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:32:30,573 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 13:32:30,576 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 13:32:30,591 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 13:32:30,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:32:30 BoogieIcfgContainer [2023-12-02 13:32:30,599 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 13:32:30,600 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 13:32:30,600 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 13:32:30,600 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 13:32:30,601 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:30" (3/4) ... [2023-12-02 13:32:30,603 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 13:32:30,604 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 13:32:30,605 INFO L158 Benchmark]: Toolchain (without parser) took 1654.44ms. Allocated memory was 157.3MB in the beginning and 209.7MB in the end (delta: 52.4MB). Free memory was 109.3MB in the beginning and 123.1MB in the end (delta: -13.9MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,605 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 157.3MB. Free memory was 131.1MB in the beginning and 130.9MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:32:30,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.80ms. Allocated memory is still 157.3MB. Free memory was 109.3MB in the beginning and 93.9MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,607 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.92ms. Allocated memory is still 157.3MB. Free memory was 93.9MB in the beginning and 87.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,607 INFO L158 Benchmark]: Boogie Preprocessor took 82.75ms. Allocated memory is still 157.3MB. Free memory was 87.7MB in the beginning and 123.5MB in the end (delta: -35.8MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,608 INFO L158 Benchmark]: RCFGBuilder took 814.30ms. Allocated memory was 157.3MB in the beginning and 209.7MB in the end (delta: 52.4MB). Free memory was 123.5MB in the beginning and 145.1MB in the end (delta: -21.6MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,609 INFO L158 Benchmark]: TraceAbstraction took 374.25ms. Allocated memory is still 209.7MB. Free memory was 144.1MB in the beginning and 123.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 13:32:30,609 INFO L158 Benchmark]: Witness Printer took 4.25ms. Allocated memory is still 209.7MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:32:30,613 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 157.3MB. Free memory was 131.1MB in the beginning and 130.9MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.80ms. Allocated memory is still 157.3MB. Free memory was 109.3MB in the beginning and 93.9MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.92ms. Allocated memory is still 157.3MB. Free memory was 93.9MB in the beginning and 87.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.75ms. Allocated memory is still 157.3MB. Free memory was 87.7MB in the beginning and 123.5MB in the end (delta: -35.8MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * RCFGBuilder took 814.30ms. Allocated memory was 157.3MB in the beginning and 209.7MB in the end (delta: 52.4MB). Free memory was 123.5MB in the beginning and 145.1MB in the end (delta: -21.6MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. * TraceAbstraction took 374.25ms. Allocated memory is still 209.7MB. Free memory was 144.1MB in the beginning and 123.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 4.25ms. Allocated memory is still 209.7MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 65. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 8); [L30] const SORT_4 msb_SORT_4 = (SORT_4)1 << (8 - 1); [L32] const SORT_16 mask_SORT_16 = (SORT_16)-1 >> (sizeof(SORT_16) * 8 - 2); [L33] const SORT_16 msb_SORT_16 = (SORT_16)1 << (2 - 1); [L35] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 32); [L36] const SORT_44 msb_SORT_44 = (SORT_44)1 << (32 - 1); [L38] const SORT_4 var_5 = 0; [L39] const SORT_4 var_8 = 255; [L40] const SORT_1 var_12 = 1; [L41] const SORT_16 var_17 = 0; [L42] const SORT_4 var_21 = 1; [L43] const SORT_4 var_23 = 63; [L44] const SORT_4 var_29 = 7; [L45] const SORT_16 var_35 = 2; [L46] const SORT_16 var_38 = 1; [L47] const SORT_44 var_45 = 0; [L48] const SORT_44 var_46 = 1; [L49] const SORT_44 var_52 = 2; [L51] SORT_1 input_2; [L52] SORT_1 input_3; [L54] EXPR __VERIFIER_nondet_uchar() & mask_SORT_4 [L54] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L55] EXPR __VERIFIER_nondet_uchar() & mask_SORT_16 [L55] SORT_16 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_16; [L57] SORT_4 init_7_arg_1 = var_5; [L58] state_6 = init_7_arg_1 [L59] SORT_16 init_19_arg_1 = var_17; [L60] state_18 = init_19_arg_1 VAL [init_19_arg_1=0, init_7_arg_1=0, mask_SORT_16=3, mask_SORT_1=1, mask_SORT_44=4294967295, mask_SORT_4=255, msb_SORT_16=2, msb_SORT_1=1, msb_SORT_44=2147483648, msb_SORT_4=128, state_18=0, state_6=0, var_12=1, var_17=0, var_21=1, var_23=63, var_29=7, var_35=2, var_38=1, var_45=0, var_46=1, var_52=2, var_5=0, var_8=255] [L63] input_2 = __VERIFIER_nondet_uchar() [L64] input_3 = __VERIFIER_nondet_uchar() [L65] EXPR input_3 & mask_SORT_1 [L65] input_3 = input_3 & mask_SORT_1 [L68] SORT_4 var_9_arg_0 = state_6; [L69] SORT_4 var_9_arg_1 = var_8; [L70] SORT_1 var_9 = var_9_arg_0 != var_9_arg_1; [L71] SORT_1 var_13_arg_0 = var_9; [L72] SORT_1 var_13 = ~var_13_arg_0; [L73] SORT_1 var_14_arg_0 = var_12; [L74] SORT_1 var_14_arg_1 = var_13; [L75] EXPR var_14_arg_0 & var_14_arg_1 [L75] SORT_1 var_14 = var_14_arg_0 & var_14_arg_1; [L76] EXPR var_14 & mask_SORT_1 [L76] var_14 = var_14 & mask_SORT_1 [L77] SORT_1 bad_15_arg_0 = var_14; [L78] CALL __VERIFIER_assert(!(bad_15_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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 [2023-12-02 13:32:30,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 54eceae7382bc15f3f6868c637e60b7eb166af5d1c4b040a6f157b03b87c995c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:32:32,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:32:32,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2023-12-02 13:32:32,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:32:32,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:32:32,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:32:32,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:32:32,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:32:32,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:32:32,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:32:32,652 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:32:32,652 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:32:32,653 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:32:32,653 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:32:32,654 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:32:32,654 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:32:32,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:32:32,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:32:32,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:32:32,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:32:32,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:32:32,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:32:32,658 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:32:32,659 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 13:32:32,659 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 13:32:32,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:32:32,660 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:32:32,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:32:32,661 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 13:32:32,661 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:32:32,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:32:32,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:32,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:32:32,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:32:32,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:32:32,663 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 13:32:32,663 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 13:32:32,663 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:32:32,663 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:32:32,664 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:32:32,664 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:32:32,664 INFO L153 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54eceae7382bc15f3f6868c637e60b7eb166af5d1c4b040a6f157b03b87c995c [2023-12-02 13:32:32,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:32:32,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:32:32,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:32:32,991 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:32:32,991 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:32:32,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:35,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:32:35,991 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:32:35,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:36,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/c2121382f/9d714b39c9c04470889b92224b49782d/FLAG0f0c00bc6 [2023-12-02 13:32:36,014 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/data/c2121382f/9d714b39c9c04470889b92224b49782d [2023-12-02 13:32:36,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:32:36,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:32:36,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:36,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:32:36,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:32:36,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4faa0b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36, skipping insertion in model container [2023-12-02 13:32:36,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,058 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:32:36,214 WARN L240 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1263,1276] [2023-12-02 13:32:36,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:36,288 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:32:36,300 WARN L240 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_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1263,1276] [2023-12-02 13:32:36,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:36,350 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:32:36,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36 WrapperNode [2023-12-02 13:32:36,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:36,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:36,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:32:36,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:32:36,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,372 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,401 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2023-12-02 13:32:36,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:36,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:32:36,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:32:36,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:32:36,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:32:36,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:32:36,441 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:32:36,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:32:36,442 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (1/1) ... [2023-12-02 13:32:36,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:36,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:32:36,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:32:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:32:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 13:32:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:32:36,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:32:36,600 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:32:36,602 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:32:36,849 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:32:36,883 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:32:36,884 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:32:36,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:36 BoogieIcfgContainer [2023-12-02 13:32:36,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:32:36,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:32:36,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:32:36,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:32:36,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:32:36" (1/3) ... [2023-12-02 13:32:36,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102cd362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:36, skipping insertion in model container [2023-12-02 13:32:36,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:36" (2/3) ... [2023-12-02 13:32:36,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102cd362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:36, skipping insertion in model container [2023-12-02 13:32:36,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:36" (3/3) ... [2023-12-02 13:32:36,893 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_traffic_light_example.c [2023-12-02 13:32:36,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:32:36,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:32:36,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:32:36,962 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=LoopHeads, 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;@bbe1c0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:32:36,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:32:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-12-02 13:32:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:32:36,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:36,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:32:36,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:36,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2023-12-02 13:32:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:36,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850103932] [2023-12-02 13:32:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:36,991 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 [2023-12-02 13:32:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:36,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 13:32:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:32:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:37,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:32:37,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:37,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:37,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850103932] [2023-12-02 13:32:37,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850103932] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:37,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:37,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908154710] [2023-12-02 13:32:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:37,362 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:37,429 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2023-12-02 13:32:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:32:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:37,439 INFO L225 Difference]: With dead ends: 16 [2023-12-02 13:32:37,439 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 13:32:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:32:37,445 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:37,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 13:32:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 13:32:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 13:32:37,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 13:32:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:37,476 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 13:32:37,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 13:32:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:32:37,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:37,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 13:32:37,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:32:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:32:37,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:37,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times [2023-12-02 13:32:37,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280704077] [2023-12-02 13:32:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:37,684 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 [2023-12-02 13:32:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:37,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 13:32:37,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:32:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:37,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 13:32:37,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:38,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:46,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280704077] [2023-12-02 13:32:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280704077] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:32:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1747058989] [2023-12-02 13:32:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:32:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:32:46,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:32:46,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-12-02 13:32:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:46,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 13:32:46,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:47,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:54,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1747058989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:32:54,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762315059] [2023-12-02 13:32:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:54,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:54,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:54,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:32:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:54,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 13:32:54,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:54,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:56,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762315059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:32:56,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:32:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 12 [2023-12-02 13:32:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188620908] [2023-12-02 13:32:56,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:32:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:32:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:32:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:32:56,329 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-12-02 13:32:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:56,519 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-12-02 13:32:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:32:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 13:32:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:56,521 INFO L225 Difference]: With dead ends: 14 [2023-12-02 13:32:56,521 INFO L226 Difference]: Without dead ends: 12 [2023-12-02 13:32:56,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:32:56,523 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:56,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-02 13:32:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-12-02 13:32:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2023-12-02 13:32:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-12-02 13:32:56,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-12-02 13:32:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:56,528 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-12-02 13:32:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-12-02 13:32:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-12-02 13:32:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:32:56,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:56,529 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2023-12-02 13:32:56,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 13:32:56,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-12-02 13:32:56,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:32:57,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:57,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:57,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2112524529, now seen corresponding path program 2 times [2023-12-02 13:32:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:57,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403789219] [2023-12-02 13:32:57,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:32:57,134 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 [2023-12-02 13:32:57,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:57,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 13:32:57,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:32:57,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:32:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:32:57,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-02 13:32:57,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:58,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:35:01,659 WARN L293 SmtUtils]: Spent 22.87s on a formula simplification that was a NOOP. DAG size: 941 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:38:24,472 WARN L293 SmtUtils]: Spent 23.58s on a formula simplification that was a NOOP. DAG size: 946 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:38:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:38:24,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403789219] [2023-12-02 13:38:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403789219] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2005462735] [2023-12-02 13:38:24,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:38:24,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:24,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:38:24,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:38:24,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 13:38:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:38:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:24,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 138 conjunts are in the unsatisfiable core [2023-12-02 13:38:24,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:38:26,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:18,149 WARN L293 SmtUtils]: Spent 47.11s on a formula simplification. DAG size of input: 1056 DAG size of output: 1050 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:44:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:44:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2005462735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834865439] [2023-12-02 13:44:52,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:44:52,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:52,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:52,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:44:53,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:44:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:44:53,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 134 conjunts are in the unsatisfiable core [2023-12-02 13:44:53,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:44:55,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:45:27,269 WARN L293 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 666 DAG size of output: 675 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:45:51,046 WARN L293 SmtUtils]: Spent 6.57s on a formula simplification that was a NOOP. DAG size: 678 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:46:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:46:05,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834865439] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:46:05,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:46:05,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 8, 8] total 27 [2023-12-02 13:46:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299019576] [2023-12-02 13:46:05,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:46:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:46:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:46:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:46:05,912 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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) [2023-12-02 13:46:15,695 WARN L293 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 712 DAG size of output: 456 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:46:25,436 WARN L293 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 714 DAG size of output: 458 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:46:37,085 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification that was a NOOP. DAG size: 708 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:46:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:46:37,090 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-12-02 13:46:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:46:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 10 [2023-12-02 13:46:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:46:37,091 INFO L225 Difference]: With dead ends: 23 [2023-12-02 13:46:37,091 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 13:46:37,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 146.2s TimeCoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:46:37,093 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:46:37,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 13:46:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 13:46:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-02 13:46:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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) [2023-12-02 13:46:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-12-02 13:46:37,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2023-12-02 13:46:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:46:37,102 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-12-02 13:46:37,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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) [2023-12-02 13:46:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-12-02 13:46:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:46:37,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:46:37,103 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2023-12-02 13:46:37,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 13:46:37,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 13:46:37,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:46:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:46:37,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:46:37,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:46:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 677461981, now seen corresponding path program 3 times [2023-12-02 13:46:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:46:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667673433] [2023-12-02 13:46:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:46:37,706 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 [2023-12-02 13:46:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:46:37,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 13:46:37,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 13:46:37,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:46:37,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:46:37,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-02 13:46:37,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:46:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:46:39,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:47:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:47:03,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:47:03,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667673433] [2023-12-02 13:47:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667673433] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:47:03,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104981419] [2023-12-02 13:47:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:47:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:47:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:47:03,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:47:03,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea16be2-2de8-48f4-bc7c-10fd4a0489a9/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 13:47:04,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:47:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:47:04,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 13:47:04,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:47:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:47:05,234 INFO L327 TraceCheckSpWp]: Computing backward predicates...