./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5 --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 7edbd2d714654fb3cac877a34ec7b56a1dc045c2b1f9c322f5dfaacff9b2ba72 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:39:06,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:39:06,457 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:39:06,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:39:06,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:39:06,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:39:06,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:39:06,495 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:39:06,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:39:06,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:39:06,497 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:39:06,498 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:39:06,498 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:39:06,499 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:39:06,500 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:39:06,500 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:39:06,501 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:39:06,502 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:39:06,502 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:39:06,503 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:39:06,504 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:39:06,509 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:39:06,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:39:06,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:39:06,526 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:39:06,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:39:06,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:39:06,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:39:06,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:39:06,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:39:06,529 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:39:06,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:39:06,530 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:39:06,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:39:06,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:39:06,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:39:06,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:39:06,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:39:06,533 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:39:06,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:39:06,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:39:06,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:39:06,536 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:39:06,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:39:06,538 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7edbd2d714654fb3cac877a34ec7b56a1dc045c2b1f9c322f5dfaacff9b2ba72 [2023-11-21 19:39:06,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:39:06,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:39:06,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:39:06,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:39:06,842 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:39:06,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:09,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:39:10,327 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:39:10,328 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:10,351 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/658cc04aa/b171853e58f94729ad45cff5a0a87310/FLAG5c9f4adb4 [2023-11-21 19:39:10,367 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/658cc04aa/b171853e58f94729ad45cff5a0a87310 [2023-11-21 19:39:10,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:39:10,372 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:39:10,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:39:10,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:39:10,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:39:10,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:10,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355f994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10, skipping insertion in model container [2023-11-21 19:39:10,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:10,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:39:10,601 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1266,1279] [2023-11-21 19:39:10,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:39:10,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:39:10,785 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1266,1279] [2023-11-21 19:39:10,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:39:10,873 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:39:10,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10 WrapperNode [2023-11-21 19:39:10,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:39:10,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:39:10,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:39:10,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:39:10,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:10,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,029 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 798 [2023-11-21 19:39:11,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:39:11,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:39:11,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:39:11,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:39:11,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:39:11,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:39:11,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:39:11,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:39:11,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (1/1) ... [2023-11-21 19:39:11,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:39:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:39:11,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:39:11,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:39:11,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:39:11,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:39:11,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:39:11,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:39:11,386 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:39:11,389 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:39:12,468 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:39:13,568 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:39:13,568 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:39:13,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:39:13 BoogieIcfgContainer [2023-11-21 19:39:13,571 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:39:13,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:39:13,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:39:13,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:39:13,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:39:10" (1/3) ... [2023-11-21 19:39:13,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab6414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:39:13, skipping insertion in model container [2023-11-21 19:39:13,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:10" (2/3) ... [2023-11-21 19:39:13,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab6414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:39:13, skipping insertion in model container [2023-11-21 19:39:13,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:39:13" (3/3) ... [2023-11-21 19:39:13,586 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:13,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:39:13,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:39:13,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:39:13,687 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;@51ff3673, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:39:13,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:39:13,693 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) [2023-11-21 19:39:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:39:13,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:39:13,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:39:13,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:39:13,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:39:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 18731454, now seen corresponding path program 1 times [2023-11-21 19:39:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:39:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223358466] [2023-11-21 19:39:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:39:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:39:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:39:14,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:39:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:39:14,404 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:39:14,410 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:39:14,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 19:39:14,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:39:14,420 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 19:39:14,425 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:39:14,474 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-11-21 19:39:14,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:39:14 BoogieIcfgContainer [2023-11-21 19:39:14,500 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:39:14,502 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:39:14,502 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:39:14,502 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:39:14,503 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:39:13" (3/4) ... [2023-11-21 19:39:14,508 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 19:39:14,509 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:39:14,510 INFO L158 Benchmark]: Toolchain (without parser) took 4138.41ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 130.0MB in the beginning and 141.8MB in the end (delta: -11.8MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,511 INFO L158 Benchmark]: CDTParser took 1.39ms. Allocated memory is still 163.6MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:39:14,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 500.99ms. Allocated memory is still 163.6MB. Free memory was 129.6MB in the beginning and 108.1MB in the end (delta: 21.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,513 INFO L158 Benchmark]: Boogie Procedure Inliner took 155.78ms. Allocated memory is still 163.6MB. Free memory was 108.1MB in the beginning and 94.0MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,516 INFO L158 Benchmark]: Boogie Preprocessor took 106.50ms. Allocated memory is still 163.6MB. Free memory was 94.0MB in the beginning and 88.6MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,521 INFO L158 Benchmark]: RCFGBuilder took 2432.35ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 88.6MB in the beginning and 91.6MB in the end (delta: -3.0MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,523 INFO L158 Benchmark]: TraceAbstraction took 925.60ms. Allocated memory is still 205.5MB. Free memory was 90.6MB in the beginning and 142.8MB in the end (delta: -52.3MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2023-11-21 19:39:14,523 INFO L158 Benchmark]: Witness Printer took 7.32ms. Allocated memory is still 205.5MB. Free memory was 142.8MB in the beginning and 141.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:39:14,533 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.39ms. Allocated memory is still 163.6MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 500.99ms. Allocated memory is still 163.6MB. Free memory was 129.6MB in the beginning and 108.1MB in the end (delta: 21.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 155.78ms. Allocated memory is still 163.6MB. Free memory was 108.1MB in the beginning and 94.0MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 106.50ms. Allocated memory is still 163.6MB. Free memory was 94.0MB in the beginning and 88.6MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2432.35ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 88.6MB in the beginning and 91.6MB in the end (delta: -3.0MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. * TraceAbstraction took 925.60ms. Allocated memory is still 205.5MB. Free memory was 90.6MB in the beginning and 142.8MB in the end (delta: -52.3MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. * Witness Printer took 7.32ms. Allocated memory is still 205.5MB. Free memory was 142.8MB in the beginning and 141.8MB 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: 21]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 163, overapproximation of bitwiseAnd at line 150. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L30] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L32] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L33] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L35] const SORT_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 4); [L36] const SORT_31 msb_SORT_31 = (SORT_31)1 << (4 - 1); [L38] const SORT_67 mask_SORT_67 = (SORT_67)-1 >> (sizeof(SORT_67) * 8 - 10); [L39] const SORT_67 msb_SORT_67 = (SORT_67)1 << (10 - 1); [L41] const SORT_1 var_7 = 0; [L42] const SORT_10 var_12 = 0; [L43] const SORT_1 var_21 = 1; [L44] const SORT_67 var_68 = 0; [L45] const SORT_10 var_119 = 104; [L46] const SORT_10 var_136 = 1; [L48] SORT_1 input_2; [L49] SORT_3 input_4; [L50] SORT_1 input_5; [L51] SORT_1 input_6; [L52] SORT_1 input_29; [L53] SORT_31 input_32; [L54] SORT_31 input_34; [L55] SORT_1 input_36; [L56] SORT_1 input_38; [L57] SORT_1 input_44; [L58] SORT_1 input_46; [L59] SORT_1 input_48; [L60] SORT_3 input_52; [L61] SORT_1 input_55; [L62] SORT_1 input_63; [L63] SORT_1 input_73; [L64] SORT_1 input_79; [L65] SORT_1 input_81; [L66] SORT_1 input_95; [L67] SORT_1 input_101; [L68] SORT_1 input_107; [L69] SORT_1 input_113; [L70] SORT_1 input_114; [L71] SORT_1 input_115; [L72] SORT_67 input_134; [L73] SORT_1 input_143; [L74] SORT_1 input_144; [L75] SORT_1 input_145; [L77] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L77] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L78] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L79] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L80] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L81] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L82] SORT_1 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L83] SORT_1 state_50 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L84] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L85] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L86] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L87] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] EXPR __VERIFIER_nondet_ushort() & mask_SORT_67 [L88] SORT_67 state_69 = __VERIFIER_nondet_ushort() & mask_SORT_67; [L89] EXPR __VERIFIER_nondet_uchar() & mask_SORT_1 [L89] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_1 init_9_arg_1 = var_7; [L92] state_8 = init_9_arg_1 [L93] SORT_1 init_15_arg_1 = var_7; [L94] state_14 = init_15_arg_1 [L95] SORT_1 init_26_arg_1 = var_7; [L96] state_25 = init_26_arg_1 [L97] SORT_1 init_28_arg_1 = var_7; [L98] state_27 = init_28_arg_1 [L99] SORT_1 init_41_arg_1 = var_7; [L100] state_40 = init_41_arg_1 [L101] SORT_1 init_43_arg_1 = var_7; [L102] state_42 = init_43_arg_1 [L103] SORT_1 init_51_arg_1 = var_21; [L104] state_50 = init_51_arg_1 [L105] SORT_1 init_58_arg_1 = var_7; [L106] state_57 = init_58_arg_1 [L107] SORT_1 init_60_arg_1 = var_7; [L108] state_59 = init_60_arg_1 [L109] SORT_1 init_62_arg_1 = var_7; [L110] state_61 = init_62_arg_1 [L111] SORT_1 init_66_arg_1 = var_7; [L112] state_65 = init_66_arg_1 [L113] SORT_67 init_70_arg_1 = var_68; [L114] state_69 = init_70_arg_1 [L115] SORT_1 init_72_arg_1 = var_7; [L116] state_71 = init_72_arg_1 VAL [init_15_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_51_arg_1=1, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_66_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_9_arg_1=0, mask_SORT_10=4294967295, mask_SORT_1=1, mask_SORT_31=15, mask_SORT_3=255, mask_SORT_67=1023, msb_SORT_10=2147483648, msb_SORT_1=1, msb_SORT_31=8, msb_SORT_3=128, msb_SORT_67=512, state_14=0, state_25=0, state_27=0, state_40=0, state_42=0, state_50=1, state_57=0, state_59=0, state_61=0, state_65=0, state_69=0, state_71=0, state_8=0, var_119=104, var_12=0, var_136=1, var_21=1, var_68=0, var_7=0] [L119] input_2 = __VERIFIER_nondet_uchar() [L120] input_4 = __VERIFIER_nondet_uchar() [L121] input_5 = __VERIFIER_nondet_uchar() [L122] input_6 = __VERIFIER_nondet_uchar() [L123] input_29 = __VERIFIER_nondet_uchar() [L124] input_32 = __VERIFIER_nondet_uchar() [L125] input_34 = __VERIFIER_nondet_uchar() [L126] input_36 = __VERIFIER_nondet_uchar() [L127] input_38 = __VERIFIER_nondet_uchar() [L128] input_44 = __VERIFIER_nondet_uchar() [L129] input_46 = __VERIFIER_nondet_uchar() [L130] input_48 = __VERIFIER_nondet_uchar() [L131] input_52 = __VERIFIER_nondet_uchar() [L132] input_55 = __VERIFIER_nondet_uchar() [L133] input_63 = __VERIFIER_nondet_uchar() [L134] input_73 = __VERIFIER_nondet_uchar() [L135] input_79 = __VERIFIER_nondet_uchar() [L136] input_81 = __VERIFIER_nondet_uchar() [L137] input_95 = __VERIFIER_nondet_uchar() [L138] input_101 = __VERIFIER_nondet_uchar() [L139] input_107 = __VERIFIER_nondet_uchar() [L140] input_113 = __VERIFIER_nondet_uchar() [L141] input_114 = __VERIFIER_nondet_uchar() [L142] input_115 = __VERIFIER_nondet_uchar() [L143] input_134 = __VERIFIER_nondet_ushort() [L144] input_143 = __VERIFIER_nondet_uchar() [L145] input_144 = __VERIFIER_nondet_uchar() [L146] input_145 = __VERIFIER_nondet_uchar() [L149] SORT_1 var_11_arg_0 = state_8; [L150] EXPR var_11_arg_0 & mask_SORT_1 [L150] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L151] SORT_10 var_11 = var_11_arg_0; [L152] SORT_10 var_13_arg_0 = var_11; [L153] SORT_10 var_13_arg_1 = var_12; [L154] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L155] SORT_1 var_16_arg_0 = state_14; [L156] EXPR var_16_arg_0 & mask_SORT_1 [L156] var_16_arg_0 = var_16_arg_0 & mask_SORT_1 [L157] SORT_10 var_16 = var_16_arg_0; [L158] SORT_10 var_17_arg_0 = var_16; [L159] SORT_10 var_17_arg_1 = var_12; [L160] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L161] SORT_1 var_18_arg_0 = var_13; [L162] SORT_1 var_18_arg_1 = var_17; [L163] EXPR var_18_arg_0 | var_18_arg_1 [L163] SORT_1 var_18 = var_18_arg_0 | var_18_arg_1; [L164] SORT_1 var_22_arg_0 = var_18; [L165] SORT_1 var_22 = ~var_22_arg_0; [L166] SORT_1 var_23_arg_0 = var_21; [L167] SORT_1 var_23_arg_1 = var_22; [L168] EXPR var_23_arg_0 & var_23_arg_1 [L168] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L169] EXPR var_23 & mask_SORT_1 [L169] var_23 = var_23 & mask_SORT_1 [L170] SORT_1 bad_24_arg_0 = var_23; [L171] CALL __VERIFIER_assert(!(bad_24_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 19:39:14,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5 --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 7edbd2d714654fb3cac877a34ec7b56a1dc045c2b1f9c322f5dfaacff9b2ba72 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:39:17,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:39:17,337 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2023-11-21 19:39:17,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:39:17,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:39:17,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:39:17,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:39:17,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:39:17,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:39:17,374 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:39:17,375 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:39:17,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:39:17,376 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:39:17,377 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:39:17,378 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:39:17,378 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:39:17,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:39:17,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:39:17,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:39:17,382 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:39:17,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:39:17,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:39:17,389 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:39:17,390 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 19:39:17,391 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 19:39:17,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:39:17,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:39:17,393 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:39:17,393 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 19:39:17,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:39:17,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:39:17,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:39:17,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:39:17,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:39:17,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:39:17,397 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 19:39:17,397 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:17,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:39:17,398 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:39:17,399 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:39:17,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:39:17,399 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7edbd2d714654fb3cac877a34ec7b56a1dc045c2b1f9c322f5dfaacff9b2ba72 [2023-11-21 19:39:17,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:39:17,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:39:17,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:39:17,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:39:17,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:39:17,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:21,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:39:21,453 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:39:21,456 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:21,473 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/4e984e3a0/cebf43f976e84b528998ace951b6e097/FLAG8365da4f2 [2023-11-21 19:39:21,494 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/data/4e984e3a0/cebf43f976e84b528998ace951b6e097 [2023-11-21 19:39:21,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:39:21,503 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:39:21,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:39:21,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:39:21,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:39:21,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:39:21" (1/1) ... [2023-11-21 19:39:21,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4101a2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:21, skipping insertion in model container [2023-11-21 19:39:21,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:39:21" (1/1) ... [2023-11-21 19:39:21,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:39:21,806 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1266,1279] [2023-11-21 19:39:22,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:39:22,058 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:39:22,082 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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1266,1279] [2023-11-21 19:39:22,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:39:22,198 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:39:22,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22 WrapperNode [2023-11-21 19:39:22,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:39:22,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:39:22,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:39:22,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:39:22,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,305 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 468 [2023-11-21 19:39:22,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:39:22,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:39:22,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:39:22,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:39:22,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,403 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:39:22,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:39:22,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:39:22,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:39:22,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (1/1) ... [2023-11-21 19:39:22,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:39:22,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:39:22,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:39:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:39:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:39:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 19:39:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:39:22,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:39:22,708 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:39:22,711 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:39:23,280 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:39:23,357 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:39:23,357 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:39:23,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:39:23 BoogieIcfgContainer [2023-11-21 19:39:23,359 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:39:23,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:39:23,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:39:23,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:39:23,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:39:21" (1/3) ... [2023-11-21 19:39:23,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531cee55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:39:23, skipping insertion in model container [2023-11-21 19:39:23,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:39:22" (2/3) ... [2023-11-21 19:39:23,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531cee55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:39:23, skipping insertion in model container [2023-11-21 19:39:23,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:39:23" (3/3) ... [2023-11-21 19:39:23,368 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2023-11-21 19:39:23,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:39:23,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:39:23,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:39:23,448 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;@28d70bca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:39:23,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:39:23,453 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) [2023-11-21 19:39:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:39:23,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:39:23,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:39:23,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:39:23,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:39:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2023-11-21 19:39:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:39:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500115218] [2023-11-21 19:39:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:39:23,492 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 [2023-11-21 19:39:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:39:23,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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) [2023-11-21 19:39:23,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:39:23,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 19:39:23,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:23,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:39:23,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:39:23,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500115218] [2023-11-21 19:39:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500115218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:39:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:39:24,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:39:24,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062951234] [2023-11-21 19:39:24,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:39:24,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:39:24,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:39:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:39:24,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:39:24,051 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) [2023-11-21 19:39:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:39:24,154 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2023-11-21 19:39:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:39:24,157 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 [2023-11-21 19:39:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:39:24,164 INFO L225 Difference]: With dead ends: 15 [2023-11-21 19:39:24,164 INFO L226 Difference]: Without dead ends: 9 [2023-11-21 19:39:24,167 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 [2023-11-21 19:39:24,172 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:39:24,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:39:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-21 19:39:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-21 19:39:24,205 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) [2023-11-21 19:39:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-21 19:39:24,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-11-21 19:39:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:39:24,208 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-21 19:39:24,208 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) [2023-11-21 19:39:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-21 19:39:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 19:39:24,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:39:24,210 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-21 19:39:24,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:24,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:24,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:39:24,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:39:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times [2023-11-21 19:39:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:39:24,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190621605] [2023-11-21 19:39:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:39:24,416 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 [2023-11-21 19:39:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:39:24,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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) [2023-11-21 19:39:24,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:39:24,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 19:39:24,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:25,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:26,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:39:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190621605] [2023-11-21 19:39:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190621605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188820441] [2023-11-21 19:39:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:39:26,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:26,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:39:26,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:39:26,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-21 19:39:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:39:26,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 19:39:26,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:26,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188820441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636803583] [2023-11-21 19:39:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:39:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:39:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:39:27,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:39:27,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:39:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:39:27,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 19:39:27,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:28,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:29,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636803583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:29,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:39:29,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 9 [2023-11-21 19:39:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361836261] [2023-11-21 19:39:29,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:39:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 19:39:29,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:39:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 19:39:29,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:39:29,147 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) [2023-11-21 19:39:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:39:29,338 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-21 19:39:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:39:29,339 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 [2023-11-21 19:39:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:39:29,340 INFO L225 Difference]: With dead ends: 14 [2023-11-21 19:39:29,340 INFO L226 Difference]: Without dead ends: 12 [2023-11-21 19:39:29,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:39:29,342 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:39:29,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:39:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-21 19:39:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-21 19:39:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:39:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-21 19:39:29,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-11-21 19:39:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:39:29,351 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-21 19:39:29,355 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) [2023-11-21 19:39:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-21 19:39:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:39:29,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:39:29,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2023-11-21 19:39:29,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:39:29,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-21 19:39:29,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:39:29,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:29,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:39:29,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:39:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2112524529, now seen corresponding path program 2 times [2023-11-21 19:39:29,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:39:29,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018360135] [2023-11-21 19:39:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:39:29,964 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 [2023-11-21 19:39:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:39:29,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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) [2023-11-21 19:39:30,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:30,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:39:30,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:39:30,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-21 19:39:30,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:30,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:38,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:39:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018360135] [2023-11-21 19:39:38,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018360135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338762923] [2023-11-21 19:39:38,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:39:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:39:38,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:39:38,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-21 19:39:38,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:39:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:39:38,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 19:39:38,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:38,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338762923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798929828] [2023-11-21 19:39:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:39:45,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:39:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:39:45,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:39:45,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:39:45,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:39:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:39:45,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-21 19:39:45,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:45,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:39:52,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798929828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:52,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:39:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 11 [2023-11-21 19:39:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998765593] [2023-11-21 19:39:52,195 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:39:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 19:39:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:39:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 19:39:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:39:52,197 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:39:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:39:52,409 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-11-21 19:39:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:39:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:39:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:39:52,411 INFO L225 Difference]: With dead ends: 17 [2023-11-21 19:39:52,411 INFO L226 Difference]: Without dead ends: 15 [2023-11-21 19:39:52,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:39:52,413 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:39:52,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:39:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-21 19:39:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-21 19:39:52,417 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) [2023-11-21 19:39:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-21 19:39:52,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2023-11-21 19:39:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:39:52,419 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-21 19:39:52,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:39:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-21 19:39:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:39:52,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:39:52,420 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2023-11-21 19:39:52,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:39:52,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:39:52,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:39:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:53,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:39:53,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:39:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash -57678563, now seen corresponding path program 3 times [2023-11-21 19:39:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:39:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306611104] [2023-11-21 19:39:53,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:39:53,024 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 [2023-11-21 19:39:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:39:53,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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) [2023-11-21 19:39:53,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:39:53,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 19:39:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:39:53,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 19:39:53,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:39:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 19:39:53,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:39:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 19:39:57,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:39:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306611104] [2023-11-21 19:39:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306611104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:39:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171335946] [2023-11-21 19:39:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:39:57,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:39:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:39:57,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:39:57,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f878d9-91a2-4a7a-a49b-44a7cf227c88/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process