./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 02da88a4f4d1ccaffb329e5ada42e451b6381aa731e6c7a9ccc4142d0ea1fbdc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:00:59,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:00:59,312 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 19:00:59,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:00:59,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:00:59,340 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:00:59,341 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:00:59,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:00:59,342 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:00:59,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:00:59,343 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:00:59,344 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:00:59,344 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:00:59,345 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:00:59,346 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:00:59,346 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:00:59,347 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:00:59,347 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:00:59,348 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:00:59,348 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:00:59,349 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:00:59,350 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:00:59,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:00:59,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:00:59,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:00:59,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:00:59,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:00:59,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:00:59,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:00:59,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:00:59,355 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:00:59,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:00:59,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:00:59,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:00:59,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:00:59,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:00:59,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:00:59,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:00:59,357 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:00:59,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:00:59,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:00:59,358 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:00:59,358 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:00:59,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:00:59,358 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02da88a4f4d1ccaffb329e5ada42e451b6381aa731e6c7a9ccc4142d0ea1fbdc [2023-12-02 19:00:59,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:00:59,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:00:59,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:00:59,602 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:00:59,602 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:00:59,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c [2023-12-02 19:01:02,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:01:02,560 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:01:02,560 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c [2023-12-02 19:01:02,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/71f3adad8/9d12c6d831e541448002868df766c6e7/FLAG42d7710ea [2023-12-02 19:01:02,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/71f3adad8/9d12c6d831e541448002868df766c6e7 [2023-12-02 19:01:02,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:01:02,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:01:02,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:01:02,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:01:02,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:01:02,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb11e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02, skipping insertion in model container [2023-12-02 19:01:02,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:01:02,738 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c[1256,1269] [2023-12-02 19:01:02,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:01:02,772 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:01:02,785 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c[1256,1269] [2023-12-02 19:01:02,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:01:02,808 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:01:02,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02 WrapperNode [2023-12-02 19:01:02,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:01:02,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:01:02,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:01:02,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:01:02,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,847 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-12-02 19:01:02,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:01:02,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:01:02,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:01:02,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:01:02,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,864 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,874 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:01:02,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:01:02,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:01:02,876 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:01:02,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (1/1) ... [2023-12-02 19:01:02,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:01:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:02,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:01:02,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:01:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:01:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:01:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:01:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:01:03,012 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:01:03,014 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:01:03,225 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:01:03,311 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:01:03,312 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:01:03,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:03 BoogieIcfgContainer [2023-12-02 19:01:03,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:01:03,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:01:03,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:01:03,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:01:03,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:01:02" (1/3) ... [2023-12-02 19:01:03,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfa19f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:01:03, skipping insertion in model container [2023-12-02 19:01:03,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:02" (2/3) ... [2023-12-02 19:01:03,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfa19f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:01:03, skipping insertion in model container [2023-12-02 19:01:03,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:03" (3/3) ... [2023-12-02 19:01:03,323 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.count2.c [2023-12-02 19:01:03,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:01:03,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:01:03,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:01:03,397 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;@e4f5dde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:01:03,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:01:03,401 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 19:01:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 19:01:03,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:03,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 19:01:03,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:03,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2852089, now seen corresponding path program 1 times [2023-12-02 19:01:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746144180] [2023-12-02 19:01:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:03,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:03,889 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 19:01:03,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746144180] [2023-12-02 19:01:03,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746144180] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:03,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:03,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:03,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121378146] [2023-12-02 19:01:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:03,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:01:03,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:01:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:03,930 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:01:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:03,976 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2023-12-02 19:01:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:01:03,979 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 19:01:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:03,986 INFO L225 Difference]: With dead ends: 15 [2023-12-02 19:01:03,986 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 19:01:03,988 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 19:01:03,992 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 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, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:03,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:01:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 19:01:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 19:01:04,015 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 19:01:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 19:01:04,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 19:01:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:04,017 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 19:01:04,017 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 19:01:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 19:01:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:01:04,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:04,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:01:04,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:01:04,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:04,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash -926931332, now seen corresponding path program 1 times [2023-12-02 19:01:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:04,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065817466] [2023-12-02 19:01:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:04,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:04,420 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 19:01:04,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065817466] [2023-12-02 19:01:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065817466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:01:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015603307] [2023-12-02 19:01:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:04,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:04,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:01:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:04,505 WARN L260 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 19:01:04,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:04,768 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 19:01:04,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:05,208 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 19:01:05,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015603307] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:05,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033666740] [2023-12-02 19:01:05,226 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:01:05,226 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:01:05,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:01:05,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:01:05,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:01:05,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:01:06,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93#(and (= |ULTIMATE.start_main_~var_5~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~msb_SORT_9~0#1| 1) (= |ULTIMATE.start_main_~var_8~0#1| 7) (= |ULTIMATE.start_main_~init_4_arg_1~0#1| 0) (= |ULTIMATE.start_main_~var_2~0#1| 0) (= 7 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (= |ULTIMATE.start_main_~var_6_arg_1~0#1| 1) (= |ULTIMATE.start_main_~var_10~0#1| 1) (<= |ULTIMATE.start_main_~state_3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~mask_SORT_9~0#1| 1) (<= 0 |ULTIMATE.start_main_~state_3~0#1|) (= 7 |ULTIMATE.start_main_~var_10_arg_1~0#1|) (= |ULTIMATE.start_main_~bad_11_arg_0~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= 7 (mod |ULTIMATE.start_main_~var_10_arg_0~0#1| 256)) (= |ULTIMATE.start_main_~state_3~0#1| |ULTIMATE.start_main_~var_10_arg_0~0#1|) (= |ULTIMATE.start_main_~msb_SORT_1~0#1| 4))' at error location [2023-12-02 19:01:06,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:01:06,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:01:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-12-02 19:01:06,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233098655] [2023-12-02 19:01:06,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:01:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:01:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:01:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:01:06,279 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:01:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:06,433 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-12-02 19:01:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:01:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:01:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:06,435 INFO L225 Difference]: With dead ends: 17 [2023-12-02 19:01:06,435 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 19:01:06,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:01:06,437 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:06,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:01:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 19:01:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-12-02 19:01:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 19:01:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-12-02 19:01:06,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2023-12-02 19:01:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:06,443 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-12-02 19:01:06,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:01:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-12-02 19:01:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:01:06,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:06,444 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2023-12-02 19:01:06,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:01:06,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:06,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:06,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2009048412, now seen corresponding path program 2 times [2023-12-02 19:01:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876388915] [2023-12-02 19:01:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:07,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876388915] [2023-12-02 19:01:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876388915] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:01:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340749702] [2023-12-02 19:01:07,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:01:07,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:07,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:07,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:07,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:01:08,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 19:01:08,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:01:08,065 WARN L260 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-02 19:01:08,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:08,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340749702] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:29,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1401122040] [2023-12-02 19:01:29,988 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 19:01:29,988 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:01:29,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:01:29,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:01:29,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:01:30,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:01:30,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (= |ULTIMATE.start_main_~var_5~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~msb_SORT_9~0#1| 1) (= |ULTIMATE.start_main_~var_8~0#1| 7) (= |ULTIMATE.start_main_~init_4_arg_1~0#1| 0) (= |ULTIMATE.start_main_~var_2~0#1| 0) (= 7 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (= |ULTIMATE.start_main_~var_6_arg_1~0#1| 1) (= |ULTIMATE.start_main_~var_10~0#1| 1) (<= |ULTIMATE.start_main_~state_3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~mask_SORT_9~0#1| 1) (<= 0 |ULTIMATE.start_main_~state_3~0#1|) (= 7 |ULTIMATE.start_main_~var_10_arg_1~0#1|) (= |ULTIMATE.start_main_~bad_11_arg_0~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= 7 (mod |ULTIMATE.start_main_~var_10_arg_0~0#1| 256)) (= |ULTIMATE.start_main_~state_3~0#1| |ULTIMATE.start_main_~var_10_arg_0~0#1|) (= |ULTIMATE.start_main_~msb_SORT_1~0#1| 4))' at error location [2023-12-02 19:01:30,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:01:30,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:01:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 20 [2023-12-02 19:01:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777259414] [2023-12-02 19:01:30,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:01:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 19:01:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 19:01:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-12-02 19:01:30,633 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 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 19:01:36,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 19:01:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:37,132 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-12-02 19:01:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:01:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 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 13 [2023-12-02 19:01:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:37,133 INFO L225 Difference]: With dead ends: 29 [2023-12-02 19:01:37,133 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 19:01:37,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:01:37,135 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:37,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 19:01:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 19:01:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-12-02 19:01:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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 19:01:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-12-02 19:01:37,143 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 13 [2023-12-02 19:01:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:37,143 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-12-02 19:01:37,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 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 19:01:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-12-02 19:01:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 19:01:37,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:37,145 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1] [2023-12-02 19:01:37,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:01:37,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:37,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:37,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1636521188, now seen corresponding path program 3 times [2023-12-02 19:01:37,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:37,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696106312] [2023-12-02 19:01:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:01:37,563 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:01:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:01:37,754 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:01:37,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:01:37,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 19:01:37,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:01:37,759 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-02 19:01:37,762 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,789 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,790 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,790 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:37,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 07:01:37 BoogieIcfgContainer [2023-12-02 19:01:37,799 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 19:01:37,800 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 19:01:37,800 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 19:01:37,800 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 19:01:37,800 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:03" (3/4) ... [2023-12-02 19:01:37,802 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 19:01:37,803 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 19:01:37,804 INFO L158 Benchmark]: Toolchain (without parser) took 35217.06ms. Allocated memory was 153.1MB in the beginning and 323.0MB in the end (delta: 169.9MB). Free memory was 103.7MB in the beginning and 207.5MB in the end (delta: -103.8MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,804 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory was 84.1MB in the beginning and 84.1MB in the end (delta: 31.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:01:37,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.10ms. Allocated memory is still 153.1MB. Free memory was 103.2MB in the beginning and 92.7MB in the end (delta: 10.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,805 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.90ms. Allocated memory is still 153.1MB. Free memory was 92.7MB in the beginning and 90.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,805 INFO L158 Benchmark]: Boogie Preprocessor took 25.77ms. Allocated memory is still 153.1MB. Free memory was 90.6MB in the beginning and 89.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,805 INFO L158 Benchmark]: RCFGBuilder took 438.44ms. Allocated memory is still 153.1MB. Free memory was 89.0MB in the beginning and 115.7MB in the end (delta: -26.7MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,806 INFO L158 Benchmark]: TraceAbstraction took 34483.25ms. Allocated memory was 153.1MB in the beginning and 323.0MB in the end (delta: 169.9MB). Free memory was 115.2MB in the beginning and 208.5MB in the end (delta: -93.3MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2023-12-02 19:01:37,806 INFO L158 Benchmark]: Witness Printer took 3.30ms. Allocated memory is still 323.0MB. Free memory was 208.5MB in the beginning and 207.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:01:37,808 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory was 84.1MB in the beginning and 84.1MB in the end (delta: 31.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.10ms. Allocated memory is still 153.1MB. Free memory was 103.2MB in the beginning and 92.7MB in the end (delta: 10.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.90ms. Allocated memory is still 153.1MB. Free memory was 92.7MB in the beginning and 90.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.77ms. Allocated memory is still 153.1MB. Free memory was 90.6MB in the beginning and 89.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 438.44ms. Allocated memory is still 153.1MB. Free memory was 89.0MB in the beginning and 115.7MB in the end (delta: -26.7MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * TraceAbstraction took 34483.25ms. Allocated memory was 153.1MB in the beginning and 323.0MB in the end (delta: 169.9MB). Free memory was 115.2MB in the beginning and 208.5MB in the end (delta: -93.3MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. * Witness Printer took 3.30ms. Allocated memory is still 323.0MB. Free memory was 208.5MB in the beginning and 207.5MB in the end (delta: 1.0MB). 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: 22]: 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 55. Possible FailurePath: [L27] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 3); [L28] const SORT_1 msb_SORT_1 = (SORT_1)1 << (3 - 1); [L30] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 1); [L31] const SORT_9 msb_SORT_9 = (SORT_9)1 << (1 - 1); [L33] const SORT_1 var_2 = 0; [L34] const SORT_1 var_5 = 1; [L35] const SORT_1 var_8 = mask_SORT_1; [L38] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L38] SORT_1 state_3 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L40] SORT_1 init_4_arg_1 = var_2; [L41] state_3 = init_4_arg_1 VAL [init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, state_3=0, var_2=0, var_5=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=1, state_3=1, var_10=0, var_10_arg_0=0, var_10_arg_1=7, var_2=0, var_5=1, var_6=1, var_6_arg_0=0, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=2, state_3=2, var_10=0, var_10_arg_0=1, var_10_arg_1=7, var_2=0, var_5=1, var_6=2, var_6_arg_0=1, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=3, state_3=3, var_10=0, var_10_arg_0=2, var_10_arg_1=7, var_2=0, var_5=1, var_6=3, var_6_arg_0=2, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=4, state_3=4, var_10=0, var_10_arg_0=3, var_10_arg_1=7, var_2=0, var_5=1, var_6=4, var_6_arg_0=3, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=5, state_3=5, var_10=0, var_10_arg_0=4, var_10_arg_1=7, var_2=0, var_5=1, var_6=5, var_6_arg_0=4, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=6, state_3=6, var_10=0, var_10_arg_0=5, var_10_arg_1=7, var_2=0, var_5=1, var_6=6, var_6_arg_0=5, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] EXPR var_6 & mask_SORT_1 [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=7, state_3=7, var_10=0, var_10_arg_0=6, var_10_arg_1=7, var_2=0, var_5=1, var_6=7, var_6_arg_0=6, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L22] 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: 34.4s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 35 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 89 IncrementalHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 6 mSDtfsCounter, 89 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 24.5s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4468 SizeOfPredicates, 64 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/51 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 19:01:37,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 02da88a4f4d1ccaffb329e5ada42e451b6381aa731e6c7a9ccc4142d0ea1fbdc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:01:39,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:01:39,753 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2023-12-02 19:01:39,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:01:39,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:01:39,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:01:39,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:01:39,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:01:39,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:01:39,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:01:39,791 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:01:39,791 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:01:39,792 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:01:39,792 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:01:39,793 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:01:39,793 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:01:39,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:01:39,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:01:39,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:01:39,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:01:39,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:01:39,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:01:39,797 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:01:39,797 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 19:01:39,798 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 19:01:39,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:01:39,799 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:01:39,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:01:39,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 19:01:39,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:01:39,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:01:39,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:01:39,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:01:39,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:01:39,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:01:39,802 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 19:01:39,802 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 19:01:39,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:01:39,803 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:01:39,803 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:01:39,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:01:39,804 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02da88a4f4d1ccaffb329e5ada42e451b6381aa731e6c7a9ccc4142d0ea1fbdc [2023-12-02 19:01:40,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:01:40,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:01:40,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:01:40,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:01:40,129 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:01:40,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c [2023-12-02 19:01:43,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:01:43,233 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:01:43,234 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c [2023-12-02 19:01:43,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/7afa26768/0a49a67d1faf4bcf8e2a350a093b8696/FLAG0a458dd03 [2023-12-02 19:01:43,254 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/data/7afa26768/0a49a67d1faf4bcf8e2a350a093b8696 [2023-12-02 19:01:43,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:01:43,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:01:43,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:01:43,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:01:43,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:01:43,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b396c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43, skipping insertion in model container [2023-12-02 19:01:43,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:01:43,457 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c[1256,1269] [2023-12-02 19:01:43,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:01:43,494 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:01:43,505 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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count2.c[1256,1269] [2023-12-02 19:01:43,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:01:43,530 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:01:43,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43 WrapperNode [2023-12-02 19:01:43,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:01:43,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:01:43,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:01:43,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:01:43,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,562 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-12-02 19:01:43,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:01:43,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:01:43,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:01:43,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:01:43,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:01:43,589 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:01:43,589 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:01:43,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:01:43,590 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (1/1) ... [2023-12-02 19:01:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:01:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:43,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:01:43,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:01:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:01:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 19:01:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:01:43,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:01:43,732 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:01:43,734 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:01:43,857 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:01:43,896 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:01:43,897 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:01:43,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:43 BoogieIcfgContainer [2023-12-02 19:01:43,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:01:43,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:01:43,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:01:43,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:01:43,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:01:43" (1/3) ... [2023-12-02 19:01:43,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf59c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:01:43, skipping insertion in model container [2023-12-02 19:01:43,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:01:43" (2/3) ... [2023-12-02 19:01:43,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf59c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:01:43, skipping insertion in model container [2023-12-02 19:01:43,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:43" (3/3) ... [2023-12-02 19:01:43,908 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.count2.c [2023-12-02 19:01:43,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:01:43,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:01:43,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:01:43,979 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@e8ccd61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:01:43,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:01:43,982 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 19:01:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 19:01:43,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:43,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 19:01:43,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:43,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2023-12-02 19:01:44,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:01:44,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045435134] [2023-12-02 19:01:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:44,007 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 19:01:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:01:44,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:44,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:01:44,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:44,216 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 19:01:44,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:01:44,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:01:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045435134] [2023-12-02 19:01:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045435134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:44,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530513144] [2023-12-02 19:01:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:44,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:01:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:01:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:01:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:44,258 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 19:01:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:44,308 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2023-12-02 19:01:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:01:44,310 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 19:01:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:44,318 INFO L225 Difference]: With dead ends: 16 [2023-12-02 19:01:44,318 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 19:01:44,321 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 19:01:44,325 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 19:01:44,327 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 19:01:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 19:01:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 19:01:44,357 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 19:01:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 19:01:44,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 19:01:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:44,360 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 19:01:44,360 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 19:01:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 19:01:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:01:44,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:44,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:01:44,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:44,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times [2023-12-02 19:01:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:01:44,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366062368] [2023-12-02 19:01:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:44,564 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 19:01:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:01:44,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:44,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:01:44,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:44,752 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 19:01:44,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:44,852 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 19:01:44,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:01:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366062368] [2023-12-02 19:01:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366062368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1686246719] [2023-12-02 19:01:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:44,854 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:01:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:01:44,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:01:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-12-02 19:01:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:44,960 WARN L260 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:01:44,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:45,064 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 19:01:45,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:45,104 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 19:01:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1686246719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72254412] [2023-12-02 19:01:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:45,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:45,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:01:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:45,160 WARN L260 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:01:45,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:45,296 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 19:01:45,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:45,354 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 19:01:45,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72254412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:45,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:01:45,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 9 [2023-12-02 19:01:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317736678] [2023-12-02 19:01:45,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:01:45,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 19:01:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:01:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 19:01:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:01:45,358 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 19:01:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:45,479 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-12-02 19:01:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:01:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 19:01:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:45,480 INFO L225 Difference]: With dead ends: 17 [2023-12-02 19:01:45,481 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 19:01:45,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:01:45,483 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:45,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:01:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 19:01:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-12-02 19:01:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 19:01:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-12-02 19:01:45,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2023-12-02 19:01:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:45,490 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-12-02 19:01:45,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 19:01:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-12-02 19:01:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:01:45,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:45,492 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2023-12-02 19:01:45,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-12-02 19:01:45,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 19:01:45,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:46,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:46,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash -57678563, now seen corresponding path program 2 times [2023-12-02 19:01:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:01:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759510691] [2023-12-02 19:01:46,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:01:46,097 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 19:01:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:01:46,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:46,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:46,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:01:46,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:01:46,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 19:01:46,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:46,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:46,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:01:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759510691] [2023-12-02 19:01:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759510691] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573237005] [2023-12-02 19:01:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:01:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:01:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:01:46,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:01:46,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 19:01:46,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:01:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:01:46,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 19:01:46,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:46,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:46,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573237005] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60107053] [2023-12-02 19:01:46,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:01:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:46,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:46,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:01:46,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:01:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:01:46,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 19:01:46,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:47,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60107053] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:47,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:01:47,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 13 [2023-12-02 19:01:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470114621] [2023-12-02 19:01:47,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:01:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:01:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:01:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:01:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:01:47,205 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 19:01:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:47,588 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-12-02 19:01:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:01:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 13 [2023-12-02 19:01:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:47,589 INFO L225 Difference]: With dead ends: 29 [2023-12-02 19:01:47,590 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 19:01:47,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-12-02 19:01:47,591 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:47,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:01:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 19:01:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-12-02 19:01:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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 19:01:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-12-02 19:01:47,599 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 13 [2023-12-02 19:01:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:47,599 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-12-02 19:01:47,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 19:01:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-12-02 19:01:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 19:01:47,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:47,601 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1] [2023-12-02 19:01:47,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:47,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 19:01:48,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:01:48,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:48,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:48,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash 284396189, now seen corresponding path program 3 times [2023-12-02 19:01:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:01:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223276379] [2023-12-02 19:01:48,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:01:48,204 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 19:01:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:01:48,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:48,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:48,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 19:01:48,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-02 19:01:48,295 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:01:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:01:48,388 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 19:01:48,388 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:01:48,389 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 19:01:48,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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)] Ended with exit code 0 [2023-12-02 19:01:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/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 19:01:48,594 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-02 19:01:48,604 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 19:01:48,644 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,645 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,646 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 07:01:48 BoogieIcfgContainer [2023-12-02 19:01:48,656 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 19:01:48,657 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 19:01:48,657 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 19:01:48,657 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 19:01:48,658 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:01:43" (3/4) ... [2023-12-02 19:01:48,658 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 19:01:48,675 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,675 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,676 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-12-02 19:01:48,724 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 19:01:48,724 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 19:01:48,725 INFO L158 Benchmark]: Toolchain (without parser) took 5467.42ms. Allocated memory was 62.9MB in the beginning and 151.0MB in the end (delta: 88.1MB). Free memory was 27.0MB in the beginning and 122.0MB in the end (delta: -95.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:01:48,726 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:01:48,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.40ms. Allocated memory was 62.9MB in the beginning and 125.8MB in the end (delta: 62.9MB). Free memory was 26.7MB in the beginning and 98.1MB in the end (delta: -71.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2023-12-02 19:01:48,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.79ms. Allocated memory is still 125.8MB. Free memory was 98.1MB in the beginning and 96.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:01:48,727 INFO L158 Benchmark]: Boogie Preprocessor took 25.24ms. Allocated memory is still 125.8MB. Free memory was 96.6MB in the beginning and 95.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:01:48,728 INFO L158 Benchmark]: RCFGBuilder took 308.38ms. Allocated memory is still 125.8MB. Free memory was 95.3MB in the beginning and 84.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 19:01:48,728 INFO L158 Benchmark]: TraceAbstraction took 4755.14ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 83.2MB in the beginning and 126.2MB in the end (delta: -43.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:01:48,728 INFO L158 Benchmark]: Witness Printer took 67.99ms. Allocated memory is still 151.0MB. Free memory was 126.2MB in the beginning and 122.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 19:01:48,731 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.40ms. Allocated memory was 62.9MB in the beginning and 125.8MB in the end (delta: 62.9MB). Free memory was 26.7MB in the beginning and 98.1MB in the end (delta: -71.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.79ms. Allocated memory is still 125.8MB. Free memory was 98.1MB in the beginning and 96.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.24ms. Allocated memory is still 125.8MB. Free memory was 96.6MB in the beginning and 95.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 308.38ms. Allocated memory is still 125.8MB. Free memory was 95.3MB in the beginning and 84.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4755.14ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 83.2MB in the beginning and 126.2MB in the end (delta: -43.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 67.99ms. Allocated memory is still 151.0MB. Free memory was 126.2MB in the beginning and 122.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 22]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 3); [L28] const SORT_1 msb_SORT_1 = (SORT_1)1 << (3 - 1); [L30] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 1); [L31] const SORT_9 msb_SORT_9 = (SORT_9)1 << (1 - 1); [L33] const SORT_1 var_2 = 0; [L34] const SORT_1 var_5 = 1; [L35] const SORT_1 var_8 = mask_SORT_1; [L38] SORT_1 state_3 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L40] SORT_1 init_4_arg_1 = var_2; [L41] state_3 = init_4_arg_1 VAL [init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, state_3=0, var_2=0, var_5=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=1, state_3=1, var_10=0, var_10_arg_0=0, var_10_arg_1=7, var_2=0, var_5=1, var_6=1, var_6_arg_0=0, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=2, state_3=2, var_10=0, var_10_arg_0=1, var_10_arg_1=7, var_2=0, var_5=1, var_6=2, var_6_arg_0=1, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=3, state_3=3, var_10=0, var_10_arg_0=2, var_10_arg_1=7, var_2=0, var_5=1, var_6=3, var_6_arg_0=2, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=4, state_3=4, var_10=0, var_10_arg_0=3, var_10_arg_1=7, var_2=0, var_5=1, var_6=4, var_6_arg_0=3, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=5, state_3=5, var_10=0, var_10_arg_0=4, var_10_arg_1=7, var_2=0, var_5=1, var_6=5, var_6_arg_0=4, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=6, state_3=6, var_10=0, var_10_arg_0=5, var_10_arg_1=7, var_2=0, var_5=1, var_6=6, var_6_arg_0=5, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L50] RET __VERIFIER_assert(!(bad_11_arg_0)) [L52] SORT_1 var_6_arg_0 = state_3; [L53] SORT_1 var_6_arg_1 = var_5; [L54] SORT_1 var_6 = var_6_arg_0 + var_6_arg_1; [L55] var_6 = var_6 & mask_SORT_1 [L56] SORT_1 next_7_arg_1 = var_6; [L58] state_3 = next_7_arg_1 VAL [bad_11_arg_0=0, init_4_arg_1=0, mask_SORT_1=7, mask_SORT_9=1, msb_SORT_1=4, msb_SORT_9=1, next_7_arg_1=7, state_3=7, var_10=0, var_10_arg_0=6, var_10_arg_1=7, var_2=0, var_5=1, var_6=7, var_6_arg_0=6, var_6_arg_1=1, var_8=7] [L46] SORT_1 var_10_arg_0 = state_3; [L47] SORT_1 var_10_arg_1 = var_8; [L48] SORT_9 var_10 = var_10_arg_0 == var_10_arg_1; [L49] SORT_9 bad_11_arg_0 = var_10; [L50] CALL __VERIFIER_assert(!(bad_11_arg_0)) [L22] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L22] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 118 IncrementalHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 6 mSDtfsCounter, 118 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 1479 SizeOfPredicates, 136 NumberOfNonLiveVariables, 347 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 19:01:48,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daa4bfb-3e79-4bbc-9ec3-3922e82ce041/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE