./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array22_pattern.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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array22_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/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 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:41:09,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:41:09,854 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:41:09,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:41:09,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:41:09,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:41:09,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:41:09,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:41:09,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:41:09,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:41:09,897 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:41:09,898 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:41:09,898 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:41:09,899 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:41:09,899 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:41:09,900 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:41:09,901 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:41:09,901 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:41:09,902 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:41:09,903 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:41:09,904 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:41:09,904 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:41:09,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:41:09,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:41:09,907 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:41:09,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:41:09,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:41:09,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:41:09,909 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:41:09,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:41:09,910 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:41:09,910 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:41:09,911 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:41:09,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:41:09,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:41:09,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:41:09,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:41:09,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:09,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:41:09,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:41:09,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:41:09,921 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:41:09,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:41:09,922 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:41:09,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:41:09,923 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:41:09,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:41:09,923 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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2023-12-02 19:41:10,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:41:10,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:41:10,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:41:10,235 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:41:10,235 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:41:10,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-patterns/array22_pattern.c [2023-12-02 19:41:13,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:41:13,803 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:41:13,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/sv-benchmarks/c/array-patterns/array22_pattern.c [2023-12-02 19:41:13,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/data/5356f862e/e37319502d004fedbcf553f32fd92249/FLAGc87582258 [2023-12-02 19:41:13,828 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/data/5356f862e/e37319502d004fedbcf553f32fd92249 [2023-12-02 19:41:13,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:41:13,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:41:13,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:13,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:41:13,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:41:13,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:13" (1/1) ... [2023-12-02 19:41:13,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ca0148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:13, skipping insertion in model container [2023-12-02 19:41:13,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:13" (1/1) ... [2023-12-02 19:41:13,866 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:41:14,014 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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2023-12-02 19:41:14,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:14,053 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:41:14,069 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_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2023-12-02 19:41:14,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:14,103 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:41:14,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14 WrapperNode [2023-12-02 19:41:14,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:14,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:14,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:41:14,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:41:14,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,124 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,149 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2023-12-02 19:41:14,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:14,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:41:14,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:41:14,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:41:14,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,179 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,180 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:41:14,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:41:14,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:41:14,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:41:14,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (1/1) ... [2023-12-02 19:41:14,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:14,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:14,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:41:14,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:41:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-12-02 19:41:14,259 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-12-02 19:41:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:41:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:41:14,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:41:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:41:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:41:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:41:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:41:14,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:41:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:41:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:41:14,351 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:41:14,354 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:41:14,597 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:41:14,699 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:41:14,700 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-02 19:41:14,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:14 BoogieIcfgContainer [2023-12-02 19:41:14,702 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:41:14,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:41:14,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:41:14,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:41:14,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:41:13" (1/3) ... [2023-12-02 19:41:14,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430acf17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:14, skipping insertion in model container [2023-12-02 19:41:14,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:14" (2/3) ... [2023-12-02 19:41:14,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430acf17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:14, skipping insertion in model container [2023-12-02 19:41:14,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:14" (3/3) ... [2023-12-02 19:41:14,714 INFO L112 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2023-12-02 19:41:14,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:41:14,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:41:14,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:41:14,797 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;@6dedf3d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:41:14,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:41:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:41:14,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:14,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:14,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:14,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1938318667, now seen corresponding path program 1 times [2023-12-02 19:41:14,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399254857] [2023-12-02 19:41:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:14,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:14,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:14,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112734961] [2023-12-02 19:41:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:14,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:41:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:15,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 19:41:15,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:15,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:15,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:15,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399254857] [2023-12-02 19:41:15,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:15,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112734961] [2023-12-02 19:41:15,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112734961] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:15,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:15,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:41:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920748481] [2023-12-02 19:41:15,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:15,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 19:41:15,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 19:41:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:41:15,111 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:41:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:15,160 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-12-02 19:41:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 19:41:15,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 19:41:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:15,171 INFO L225 Difference]: With dead ends: 33 [2023-12-02 19:41:15,172 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 19:41:15,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 19:41:15,180 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 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 19:41:15,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 19:41:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-02 19:41:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-02 19:41:15,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2023-12-02 19:41:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:15,221 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-02 19:41:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:41:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-02 19:41:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 19:41:15,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:15,223 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:15,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:41:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 19:41:15,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:15,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -651899950, now seen corresponding path program 1 times [2023-12-02 19:41:15,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:15,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498727445] [2023-12-02 19:41:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:15,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:15,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486199897] [2023-12-02 19:41:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:15,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:15,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:41:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:15,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:41:15,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:41:15,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:15,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498727445] [2023-12-02 19:41:15,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486199897] [2023-12-02 19:41:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486199897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:41:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795907480] [2023-12-02 19:41:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:41:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:41:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:41:15,666 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:15,721 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-12-02 19:41:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:41:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-12-02 19:41:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:15,723 INFO L225 Difference]: With dead ends: 28 [2023-12-02 19:41:15,724 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 19:41:15,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:41:15,726 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:15,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 19:41:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 19:41:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-12-02 19:41:15,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2023-12-02 19:41:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:15,736 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-12-02 19:41:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-12-02 19:41:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:41:15,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:15,738 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:15,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:41:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:15,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:15,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -740825203, now seen corresponding path program 1 times [2023-12-02 19:41:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:15,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329652142] [2023-12-02 19:41:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:15,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306882981] [2023-12-02 19:41:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:15,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:15,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:41:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:16,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:41:16,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:41:16,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:16,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329652142] [2023-12-02 19:41:16,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306882981] [2023-12-02 19:41:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306882981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:16,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:41:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2707873] [2023-12-02 19:41:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:16,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:41:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:16,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:41:16,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:41:16,154 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:16,281 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2023-12-02 19:41:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:41:16,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-12-02 19:41:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:16,283 INFO L225 Difference]: With dead ends: 51 [2023-12-02 19:41:16,283 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 19:41:16,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:41:16,286 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:16,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 19:41:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-12-02 19:41:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-12-02 19:41:16,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2023-12-02 19:41:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:16,297 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-12-02 19:41:16,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-12-02 19:41:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 19:41:16,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:16,299 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:16,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 19:41:16,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 19:41:16,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:16,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1069598254, now seen corresponding path program 1 times [2023-12-02 19:41:16,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:16,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143180864] [2023-12-02 19:41:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:16,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404091643] [2023-12-02 19:41:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:16,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:16,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:16,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:41:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:16,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:41:16,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:41:16,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:16,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:16,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143180864] [2023-12-02 19:41:16,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404091643] [2023-12-02 19:41:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404091643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:16,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:41:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304419562] [2023-12-02 19:41:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:16,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:41:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:41:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:41:16,657 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:16,719 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-12-02 19:41:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:41:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-12-02 19:41:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:16,720 INFO L225 Difference]: With dead ends: 50 [2023-12-02 19:41:16,720 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 19:41:16,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:41:16,723 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:16,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 19:41:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-12-02 19:41:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-02 19:41:16,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2023-12-02 19:41:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:16,733 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-02 19:41:16,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-02 19:41:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 19:41:16,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:16,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:16,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:41:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:16,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:16,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 211388520, now seen corresponding path program 1 times [2023-12-02 19:41:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74017352] [2023-12-02 19:41:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:16,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:16,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364168963] [2023-12-02 19:41:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:16,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:16,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:16,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:16,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:41:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:17,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:41:17,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:41:17,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:41:17,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:17,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74017352] [2023-12-02 19:41:17,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:17,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364168963] [2023-12-02 19:41:17,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364168963] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587696690] [2023-12-02 19:41:17,228 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 19:41:17,228 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:17,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:17,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:17,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:19,342 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 19:41:19,345 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 51 for LOIs [2023-12-02 19:41:19,362 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:21,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '934#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 19:41:21,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:21,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:41:21,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-02 19:41:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785737637] [2023-12-02 19:41:21,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:41:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:41:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=723, Unknown=7, NotChecked=0, Total=870 [2023-12-02 19:41:21,902 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 19:41:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:22,016 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-12-02 19:41:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:41:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 32 [2023-12-02 19:41:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:22,018 INFO L225 Difference]: With dead ends: 54 [2023-12-02 19:41:22,018 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 19:41:22,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=778, Unknown=7, NotChecked=0, Total=930 [2023-12-02 19:41:22,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:22,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 19:41:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 19:41:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:41:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-02 19:41:22,031 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2023-12-02 19:41:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:22,031 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-02 19:41:22,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 19:41:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-02 19:41:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 19:41:22,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:22,033 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:22,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:41:22,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:22,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:22,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash 609822147, now seen corresponding path program 2 times [2023-12-02 19:41:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:22,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128823720] [2023-12-02 19:41:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:22,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:22,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:41:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912689080] [2023-12-02 19:41:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:41:22,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:22,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:22,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_977a1dcf-6abd-4a4c-bfe1-b6db4c5b1f6f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:41:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:41:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:22,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:41:22,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:41:22,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 19:41:22,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128823720] [2023-12-02 19:41:22,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:41:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912689080] [2023-12-02 19:41:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912689080] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354182089] [2023-12-02 19:41:22,530 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 19:41:22,530 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:22,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:22,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:22,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs