./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f9cd32f4b321d9995f5b714ac7ab8f417de9e23e3b823c49499e1a07b5844c4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:11:09,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:11:09,117 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:11:09,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:11:09,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:11:09,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:11:09,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:11:09,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:11:09,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:11:09,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:11:09,155 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:11:09,156 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:11:09,156 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:11:09,157 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:11:09,157 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:11:09,158 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:11:09,158 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:11:09,159 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:11:09,159 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:11:09,160 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:11:09,161 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:11:09,162 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:11:09,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:11:09,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:11:09,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:11:09,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:11:09,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:11:09,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:11:09,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:11:09,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:11:09,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:11:09,166 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:11:09,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:11:09,167 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:11:09,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:11:09,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:11:09,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:11:09,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:11:09,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:11:09,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:11:09,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:11:09,169 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:11:09,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:11:09,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:11:09,170 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:11:09,170 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:11:09,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:11:09,170 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_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f9cd32f4b321d9995f5b714ac7ab8f417de9e23e3b823c49499e1a07b5844c4 [2023-12-02 13:11:09,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:11:09,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:11:09,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:11:09,431 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:11:09,432 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:11:09,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2023-12-02 13:11:12,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:11:12,486 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:11:12,486 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2023-12-02 13:11:12,494 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/data/537530ebd/39c6226b858f49cf9aa5a555951ca477/FLAGaf2d7c7ed [2023-12-02 13:11:12,508 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/data/537530ebd/39c6226b858f49cf9aa5a555951ca477 [2023-12-02 13:11:12,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:11:12,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:11:12,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:11:12,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:11:12,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:11:12,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0797c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12, skipping insertion in model container [2023-12-02 13:11:12,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:11:12,688 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_2e0e4318-e33f-4933-b453-be704343aac5/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2023-12-02 13:11:12,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:11:12,726 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:11:12,741 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_2e0e4318-e33f-4933-b453-be704343aac5/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2023-12-02 13:11:12,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:11:12,767 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:11:12,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12 WrapperNode [2023-12-02 13:11:12,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:11:12,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:11:12,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:11:12,769 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:11:12,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,782 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,801 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2023-12-02 13:11:12,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:11:12,802 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:11:12,802 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:11:12,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:11:12,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:11:12,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:11:12,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:11:12,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:11:12,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (1/1) ... [2023-12-02 13:11:12,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:11:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:12,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:11:12,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:11:12,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:11:12,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:11:12,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:11:12,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:11:12,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:11:12,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:11:12,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:11:12,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:11:12,977 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:11:12,980 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:11:13,172 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:11:13,210 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:11:13,210 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:11:13,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:11:13 BoogieIcfgContainer [2023-12-02 13:11:13,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:11:13,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:11:13,215 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:11:13,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:11:13,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:11:12" (1/3) ... [2023-12-02 13:11:13,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39317799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:11:13, skipping insertion in model container [2023-12-02 13:11:13,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:11:12" (2/3) ... [2023-12-02 13:11:13,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39317799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:11:13, skipping insertion in model container [2023-12-02 13:11:13,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:11:13" (3/3) ... [2023-12-02 13:11:13,223 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2023-12-02 13:11:13,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:11:13,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:11:13,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:11:13,320 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;@f7c7ec9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:11:13,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:11:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 13:11:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:11:13,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:13,337 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:13,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:13,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1288775727, now seen corresponding path program 1 times [2023-12-02 13:11:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:13,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229133687] [2023-12-02 13:11:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:13,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:13,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:13,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884218137] [2023-12-02 13:11:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:13,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:13,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:13,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:11:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:13,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:11:13,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:11:13,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:13,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229133687] [2023-12-02 13:11:13,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:11:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884218137] [2023-12-02 13:11:13,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884218137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:13,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:11:13,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:11:13,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546640875] [2023-12-02 13:11:13,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:11:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:11:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:11:13,635 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:13,666 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2023-12-02 13:11:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:11:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2023-12-02 13:11:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:13,676 INFO L225 Difference]: With dead ends: 50 [2023-12-02 13:11:13,677 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 13:11:13,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:11:13,685 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:13,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:11:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 13:11:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-02 13:11:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:11:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-12-02 13:11:13,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2023-12-02 13:11:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:13,735 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-12-02 13:11:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-12-02 13:11:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:11:13,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:13,737 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:13,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:11:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:11:13,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:13,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 226858993, now seen corresponding path program 1 times [2023-12-02 13:11:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845159626] [2023-12-02 13:11:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:13,957 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758707475] [2023-12-02 13:11:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:13,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:13,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:13,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:11:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:14,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:11:14,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:11:14,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:14,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845159626] [2023-12-02 13:11:14,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:11:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758707475] [2023-12-02 13:11:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758707475] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:11:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:11:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213282953] [2023-12-02 13:11:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:11:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:11:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:11:14,095 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:14,120 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2023-12-02 13:11:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:11:14,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2023-12-02 13:11:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:14,122 INFO L225 Difference]: With dead ends: 37 [2023-12-02 13:11:14,122 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 13:11:14,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:11:14,124 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:14,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:11:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 13:11:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-02 13:11:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:11:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2023-12-02 13:11:14,135 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2023-12-02 13:11:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:14,135 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2023-12-02 13:11:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2023-12-02 13:11:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:11:14,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:14,137 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:14,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:11:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:14,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:14,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1563892497, now seen corresponding path program 1 times [2023-12-02 13:11:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129875421] [2023-12-02 13:11:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:14,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:14,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150920655] [2023-12-02 13:11:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:14,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:14,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:14,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:11:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:14,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:11:14,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:11:14,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:11:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:11:14,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129875421] [2023-12-02 13:11:14,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:11:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150920655] [2023-12-02 13:11:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150920655] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:11:14,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163667502] [2023-12-02 13:11:14,535 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 13:11:14,536 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:11:14,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:11:14,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:11:14,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:11:15,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 13:11:15,639 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:11:17,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1163667502] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:17,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:11:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2023-12-02 13:11:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671807874] [2023-12-02 13:11:17,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:17,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:11:17,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:11:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:11:17,009 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:11:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:17,238 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-12-02 13:11:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:11:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-02 13:11:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:17,240 INFO L225 Difference]: With dead ends: 38 [2023-12-02 13:11:17,240 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 13:11:17,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:11:17,242 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:17,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:11:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 13:11:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-02 13:11:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:11:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-12-02 13:11:17,256 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2023-12-02 13:11:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:17,256 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-12-02 13:11:17,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:11:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-12-02 13:11:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:11:17,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:17,258 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:17,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:11:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:17,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:17,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash 281079646, now seen corresponding path program 1 times [2023-12-02 13:11:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:17,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248873180] [2023-12-02 13:11:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:17,470 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:17,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862079176] [2023-12-02 13:11:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:17,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:17,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:11:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:17,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:11:17,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:11:17,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:17,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248873180] [2023-12-02 13:11:17,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:11:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862079176] [2023-12-02 13:11:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862079176] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:11:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:11:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770280194] [2023-12-02 13:11:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:17,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:11:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:11:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:11:17,581 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:17,636 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-12-02 13:11:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:11:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2023-12-02 13:11:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:17,641 INFO L225 Difference]: With dead ends: 44 [2023-12-02 13:11:17,641 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 13:11:17,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:11:17,643 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:17,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:11:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 13:11:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 13:11:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 13:11:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-12-02 13:11:17,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2023-12-02 13:11:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:17,654 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-12-02 13:11:17,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:11:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-12-02 13:11:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:11:17,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:17,656 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:17,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 13:11:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:17,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:17,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -717512630, now seen corresponding path program 1 times [2023-12-02 13:11:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:17,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583012014] [2023-12-02 13:11:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:17,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896095140] [2023-12-02 13:11:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:17,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:17,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:11:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:11:17,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:11:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:11:17,966 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:11:17,967 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:11:17,968 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 13:11:17,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:11:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:18,183 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-02 13:11:18,186 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 13:11:18,200 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 13:11:18,201 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-12-02 13:11:18,202 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 13:11:18,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:11:18 BoogieIcfgContainer [2023-12-02 13:11:18,212 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 13:11:18,213 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 13:11:18,213 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 13:11:18,213 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 13:11:18,214 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:11:13" (3/4) ... [2023-12-02 13:11:18,215 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 13:11:18,222 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 13:11:18,222 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-12-02 13:11:18,223 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 13:11:18,255 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 13:11:18,255 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 13:11:18,255 INFO L158 Benchmark]: Toolchain (without parser) took 5742.83ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 152.7MB in the beginning and 128.1MB in the end (delta: 24.6MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,256 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:11:18,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.05ms. Allocated memory is still 190.8MB. Free memory was 152.2MB in the beginning and 141.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,256 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.70ms. Allocated memory is still 190.8MB. Free memory was 141.2MB in the beginning and 139.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:11:18,257 INFO L158 Benchmark]: Boogie Preprocessor took 21.57ms. Allocated memory is still 190.8MB. Free memory was 139.7MB in the beginning and 138.6MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,257 INFO L158 Benchmark]: RCFGBuilder took 387.58ms. Allocated memory is still 190.8MB. Free memory was 138.2MB in the beginning and 125.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,258 INFO L158 Benchmark]: TraceAbstraction took 4997.39ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 124.5MB in the beginning and 131.3MB in the end (delta: -6.8MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,258 INFO L158 Benchmark]: Witness Printer took 41.90ms. Allocated memory is still 230.7MB. Free memory was 131.3MB in the beginning and 128.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 13:11:18,260 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.05ms. Allocated memory is still 190.8MB. Free memory was 152.2MB in the beginning and 141.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.70ms. Allocated memory is still 190.8MB. Free memory was 141.2MB in the beginning and 139.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.57ms. Allocated memory is still 190.8MB. Free memory was 139.7MB in the beginning and 138.6MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 387.58ms. Allocated memory is still 190.8MB. Free memory was 138.2MB in the beginning and 125.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4997.39ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 124.5MB in the beginning and 131.3MB in the end (delta: -6.8MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * Witness Printer took 41.90ms. Allocated memory is still 230.7MB. Free memory was 131.3MB in the beginning and 128.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=1, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=1, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) VAL [a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) VAL [a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [a=1, b=1, c=0, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] COND TRUE counter++<1 [L41] COND FALSE, EXPR !(!(b != 0)) [L43] EXPR c = a [L44] EXPR k = 0 VAL [a=1, b=1, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] EXPR counter++ VAL [a=1, b=1, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] COND FALSE, EXPR !(counter++<1) [L57] EXPR a = b [L58] EXPR b = c [L60] long long temp; [L61] EXPR temp = p [L62] EXPR p = q [L63] EXPR q = temp - q * k [L64] EXPR temp = r [L65] EXPR r = s [L66] EXPR s = temp - s * k [L40-L67] { if (!(b != 0)) break; c = a; k = 0; while (counter++<1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } VAL [a=1, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [a=1, b=1, c=1, counter=3, k=0, p=0, q=1, r=1, s=0, x=1, xy=1, y=1, yy=1] [L40] COND FALSE !(counter++<1) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 281 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 160 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 126 IncrementalHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 121 mSDtfsCounter, 126 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 195 SizeOfPredicates, 3 NumberOfNonLiveVariables, 380 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 56/60 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: OVERALL_TIME: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 7, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 12, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 27, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 15, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 164, DAG_COMPRESSION_RETAINED_NODES: 40, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 13:11:18,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0e4318-e33f-4933-b453-be704343aac5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE