./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-2-u.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_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/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_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/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_992ec597-e70a-4808-bff9-b92597e03f0e/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 d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:00:21,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:00:21,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:00:21,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:00:21,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:00:21,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:00:21,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:00:21,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:00:21,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:00:21,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:00:21,765 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:00:21,766 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:00:21,766 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:00:21,767 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:00:21,767 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:00:21,768 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:00:21,768 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:00:21,769 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:00:21,769 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:00:21,770 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:00:21,770 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:00:21,771 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:00:21,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:00:21,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:00:21,773 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:00:21,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:00:21,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:00:21,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:00:21,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:00:21,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:00:21,776 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:00:21,776 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:00:21,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:00:21,777 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:00:21,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:00:21,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:00:21,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:00:21,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:00:21,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:00:21,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:00:21,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:00:21,779 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:00:21,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:00:21,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:00:21,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:00:21,779 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:00:21,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:00:21,780 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_992ec597-e70a-4808-bff9-b92597e03f0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 [2023-12-02 15:00:22,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:00:22,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:00:22,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:00:22,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:00:22,033 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:00:22,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2023-12-02 15:00:24,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:00:24,948 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:00:24,949 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2023-12-02 15:00:24,954 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/data/2694eadc3/58ff5cea2a934406b1716122ecd13ae0/FLAGb02527f54 [2023-12-02 15:00:24,965 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/data/2694eadc3/58ff5cea2a934406b1716122ecd13ae0 [2023-12-02 15:00:24,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:00:24,969 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:00:24,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:00:24,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:00:24,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:00:24,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:00:24" (1/1) ... [2023-12-02 15:00:24,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50495f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:24, skipping insertion in model container [2023-12-02 15:00:24,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:00:24" (1/1) ... [2023-12-02 15:00:24,998 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:00:25,118 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_992ec597-e70a-4808-bff9-b92597e03f0e/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2023-12-02 15:00:25,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:00:25,142 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:00:25,155 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_992ec597-e70a-4808-bff9-b92597e03f0e/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2023-12-02 15:00:25,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:00:25,178 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:00:25,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25 WrapperNode [2023-12-02 15:00:25,179 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:00:25,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:00:25,180 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:00:25,180 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:00:25,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,216 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-12-02 15:00:25,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:00:25,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:00:25,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:00:25,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:00:25,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,228 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:00:25,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:00:25,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:00:25,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:00:25,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (1/1) ... [2023-12-02 15:00:25,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:00:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:25,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:00:25,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:00:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:00:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:00:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:00:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:00:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:00:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:00:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:00:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:00:25,375 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:00:25,378 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:00:25,511 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:00:25,548 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:00:25,549 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 15:00:25,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:00:25 BoogieIcfgContainer [2023-12-02 15:00:25,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:00:25,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:00:25,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:00:25,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:00:25,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:00:24" (1/3) ... [2023-12-02 15:00:25,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692cad5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:00:25, skipping insertion in model container [2023-12-02 15:00:25,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:00:25" (2/3) ... [2023-12-02 15:00:25,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692cad5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:00:25, skipping insertion in model container [2023-12-02 15:00:25,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:00:25" (3/3) ... [2023-12-02 15:00:25,560 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2023-12-02 15:00:25,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:00:25,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:00:25,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:00:25,623 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;@4cee4d12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:00:25,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:00:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:00:25,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:25,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:25,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:25,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash -321639508, now seen corresponding path program 1 times [2023-12-02 15:00:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959125689] [2023-12-02 15:00:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:25,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:25,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415059921] [2023-12-02 15:00:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:25,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:25,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:25,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:00:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:25,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:00:25,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:25,894 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 15:00:25,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:00:25,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959125689] [2023-12-02 15:00:25,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:25,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415059921] [2023-12-02 15:00:25,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415059921] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:25,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:25,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:00:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642902118] [2023-12-02 15:00:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:25,928 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:25,980 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2023-12-02 15:00:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:00:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:25,990 INFO L225 Difference]: With dead ends: 23 [2023-12-02 15:00:25,990 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 15:00:25,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:25,996 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:25,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:00:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 15:00:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-12-02 15:00:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-12-02 15:00:26,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2023-12-02 15:00:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:26,029 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-12-02 15:00:26,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-12-02 15:00:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:00:26,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:26,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:26,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:00:26,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 15:00:26,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -814249556, now seen corresponding path program 1 times [2023-12-02 15:00:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705989968] [2023-12-02 15:00:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:26,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824755855] [2023-12-02 15:00:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:26,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:26,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:00:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:26,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:00:26,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:26,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:00:26,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705989968] [2023-12-02 15:00:26,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824755855] [2023-12-02 15:00:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824755855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:26,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:26,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974233269] [2023-12-02 15:00:26,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:00:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:00:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:00:26,341 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:26,388 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-12-02 15:00:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:00:26,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:00:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:26,389 INFO L225 Difference]: With dead ends: 31 [2023-12-02 15:00:26,389 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 15:00:26,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:00:26,391 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:26,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:00:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 15:00:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-12-02 15:00:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-12-02 15:00:26,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2023-12-02 15:00:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:26,398 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-12-02 15:00:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-12-02 15:00:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:00:26,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:26,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:26,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:00:26,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:26,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2010050416, now seen corresponding path program 1 times [2023-12-02 15:00:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:26,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065160700] [2023-12-02 15:00:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:26,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:26,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101723364] [2023-12-02 15:00:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:26,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:26,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:26,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:00:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:26,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:00:26,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:26,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:26,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065160700] [2023-12-02 15:00:26,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101723364] [2023-12-02 15:00:26,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101723364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:00:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354096049] [2023-12-02 15:00:26,761 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 15:00:26,761 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:00:26,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:00:26,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:00:26,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:00:27,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:00:27,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [354096049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:27,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:27,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2023-12-02 15:00:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514023789] [2023-12-02 15:00:27,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:27,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:00:27,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:00:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:00:27,930 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:28,168 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-12-02 15:00:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:00:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:00:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:28,170 INFO L225 Difference]: With dead ends: 31 [2023-12-02 15:00:28,170 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 15:00:28,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:00:28,172 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:28,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:00:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 15:00:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2023-12-02 15:00:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-12-02 15:00:28,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2023-12-02 15:00:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:28,185 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-12-02 15:00:28,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-12-02 15:00:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:00:28,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:28,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:28,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:00:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:28,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:28,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash -12525556, now seen corresponding path program 1 times [2023-12-02 15:00:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:28,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721190031] [2023-12-02 15:00:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:28,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:28,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401968230] [2023-12-02 15:00:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:28,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:28,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:28,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:00:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:28,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:00:28,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:00:28,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:00:28,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:28,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721190031] [2023-12-02 15:00:28,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:28,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401968230] [2023-12-02 15:00:28,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401968230] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:00:28,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144282846] [2023-12-02 15:00:28,526 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:00:28,526 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:00:28,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:00:28,526 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:00:28,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:00:29,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:00:30,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_79| Int) (|v_ULTIMATE.start_main_~i~0#1_79| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_79|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_79|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:00:30,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:00:30,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:30,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 15:00:30,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734168662] [2023-12-02 15:00:30,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:00:30,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:00:30,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:00:30,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:00:30,840 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:30,937 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2023-12-02 15:00:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:00:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 15:00:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:30,939 INFO L225 Difference]: With dead ends: 52 [2023-12-02 15:00:30,939 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 15:00:30,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:00:30,941 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:30,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:00:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 15:00:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2023-12-02 15:00:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-02 15:00:30,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2023-12-02 15:00:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:30,951 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-02 15:00:30,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-02 15:00:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 15:00:30,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:30,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:30,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:00:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:31,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:31,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1250776380, now seen corresponding path program 2 times [2023-12-02 15:00:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:31,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248477868] [2023-12-02 15:00:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:31,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896697757] [2023-12-02 15:00:31,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:00:31,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:31,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:31,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:31,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:00:31,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:00:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:00:31,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:00:31,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:00:31,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:00:31,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248477868] [2023-12-02 15:00:31,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896697757] [2023-12-02 15:00:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896697757] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:00:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535819800] [2023-12-02 15:00:31,281 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:00:31,282 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:00:31,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:00:31,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:00:31,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:00:32,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:00:32,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '674#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~j~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_97| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_112|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_97|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:00:32,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:00:32,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:32,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 15:00:32,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447364000] [2023-12-02 15:00:32,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:00:32,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:00:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:00:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:00:32,736 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:32,781 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2023-12-02 15:00:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:00:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 15:00:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:32,782 INFO L225 Difference]: With dead ends: 72 [2023-12-02 15:00:32,783 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 15:00:32,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:00:32,784 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:32,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:00:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 15:00:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-02 15:00:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-12-02 15:00:32,798 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2023-12-02 15:00:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:32,798 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-12-02 15:00:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-12-02 15:00:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:00:32,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:32,799 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:32,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:00:33,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:33,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:33,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1863616572, now seen corresponding path program 3 times [2023-12-02 15:00:33,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:33,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864147785] [2023-12-02 15:00:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:33,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025536161] [2023-12-02 15:00:33,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:00:33,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:33,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:33,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:00:33,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:00:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:00:33,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:00:33,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 15:00:33,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 15:00:33,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864147785] [2023-12-02 15:00:33,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025536161] [2023-12-02 15:00:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025536161] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:00:33,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588346888] [2023-12-02 15:00:33,217 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:00:33,217 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:00:33,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:00:33,218 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:00:33,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:00:33,959 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:00:34,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1123#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~j~0#1_139| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_112|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_139|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:00:34,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:00:34,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-02 15:00:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615683531] [2023-12-02 15:00:34,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:00:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 15:00:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 15:00:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:00:34,670 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:35,049 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2023-12-02 15:00:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 15:00:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 15:00:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:35,052 INFO L225 Difference]: With dead ends: 148 [2023-12-02 15:00:35,052 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 15:00:35,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1213, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:00:35,054 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:35,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 67 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:00:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 15:00:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2023-12-02 15:00:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-12-02 15:00:35,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2023-12-02 15:00:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:35,088 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-12-02 15:00:35,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-12-02 15:00:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 15:00:35,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:35,090 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:35,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 15:00:35,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:35,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:35,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash -928318452, now seen corresponding path program 4 times [2023-12-02 15:00:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:35,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566007434] [2023-12-02 15:00:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:35,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749360468] [2023-12-02 15:00:35,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:00:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:35,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:35,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:00:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:35,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:00:35,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-12-02 15:00:35,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-12-02 15:00:35,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566007434] [2023-12-02 15:00:35,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:00:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749360468] [2023-12-02 15:00:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749360468] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:00:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75561786] [2023-12-02 15:00:35,566 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:00:35,566 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:00:35,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:00:35,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:00:35,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:00:36,386 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:00:37,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1864#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_134| Int) (|v_ULTIMATE.start_main_~j~0#1_204| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_204|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_134|))))' at error location [2023-12-02 15:00:37,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:00:37,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:37,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-02 15:00:37,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947391779] [2023-12-02 15:00:37,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:00:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:00:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:00:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:00:37,037 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:37,230 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2023-12-02 15:00:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:00:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 15:00:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:37,232 INFO L225 Difference]: With dead ends: 212 [2023-12-02 15:00:37,232 INFO L226 Difference]: Without dead ends: 152 [2023-12-02 15:00:37,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:00:37,233 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:37,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 30 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:00:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-02 15:00:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-12-02 15:00:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 132 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2023-12-02 15:00:37,258 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2023-12-02 15:00:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:37,258 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2023-12-02 15:00:37,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:00:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2023-12-02 15:00:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:00:37,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:37,261 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:37,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:00:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:37,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:37,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash -702625780, now seen corresponding path program 5 times [2023-12-02 15:00:37,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:37,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435003211] [2023-12-02 15:00:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:37,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:00:37,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219715268] [2023-12-02 15:00:37,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:00:37,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:37,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:37,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:37,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:00:59,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 15:00:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:00:59,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:00:59,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2023-12-02 15:00:59,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2023-12-02 15:01:00,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:00,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435003211] [2023-12-02 15:01:00,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:01:00,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219715268] [2023-12-02 15:01:00,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219715268] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:01:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277326182] [2023-12-02 15:01:00,126 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:01:00,126 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:01:00,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:01:00,127 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:01:00,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:01:00,779 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:01:01,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3135#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_321| Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_155|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_321|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:01:01,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:01:01,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:01:01,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 15:01:01,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539195833] [2023-12-02 15:01:01,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:01:01,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:01:01,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:01:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:01:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 15:01:01,382 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:01:01,822 INFO L93 Difference]: Finished difference Result 428 states and 566 transitions. [2023-12-02 15:01:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 15:01:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-02 15:01:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:01:01,824 INFO L225 Difference]: With dead ends: 428 [2023-12-02 15:01:01,824 INFO L226 Difference]: Without dead ends: 308 [2023-12-02 15:01:01,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=628, Invalid=1352, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 15:01:01,827 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 364 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:01:01,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 66 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:01:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-02 15:01:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 265. [2023-12-02 15:01:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2023-12-02 15:01:01,882 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2023-12-02 15:01:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:01:01,882 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2023-12-02 15:01:01,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2023-12-02 15:01:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-12-02 15:01:01,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:01:01,885 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:01:01,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:01:02,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:02,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:01:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:01:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1164353524, now seen corresponding path program 6 times [2023-12-02 15:01:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:01:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862204731] [2023-12-02 15:01:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:01:02,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:01:02,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001415643] [2023-12-02 15:01:02,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:01:02,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:02,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:02,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:02,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:01:02,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:01:02,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:01:02,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 15:01:02,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:01:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2023-12-02 15:01:03,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2023-12-02 15:01:03,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862204731] [2023-12-02 15:01:03,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:01:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001415643] [2023-12-02 15:01:03,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001415643] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:01:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236237714] [2023-12-02 15:01:03,598 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:01:03,598 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:01:03,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:01:03,598 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:01:03,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:01:04,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:01:05,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_176| Int) (|v_ULTIMATE.start_main_~j~0#1_453| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_176|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_453|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:01:05,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:01:05,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:01:05,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2023-12-02 15:01:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237808033] [2023-12-02 15:01:05,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:01:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-02 15:01:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:01:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-02 15:01:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1290, Invalid=3000, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 15:01:05,378 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:01:08,478 INFO L93 Difference]: Finished difference Result 1487 states and 1700 transitions. [2023-12-02 15:01:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-02 15:01:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-12-02 15:01:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:01:08,487 INFO L225 Difference]: With dead ends: 1487 [2023-12-02 15:01:08,487 INFO L226 Difference]: Without dead ends: 1320 [2023-12-02 15:01:08,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8522, Invalid=20208, Unknown=0, NotChecked=0, Total=28730 [2023-12-02 15:01:08,495 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 618 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:01:08,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 532 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:01:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2023-12-02 15:01:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 553. [2023-12-02 15:01:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.0815217391304348) internal successors, (597), 552 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 597 transitions. [2023-12-02 15:01:08,584 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 597 transitions. Word has length 199 [2023-12-02 15:01:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:01:08,584 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 597 transitions. [2023-12-02 15:01:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 597 transitions. [2023-12-02 15:01:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-12-02 15:01:08,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:01:08,592 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:01:08,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:01:08,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:08,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:01:08,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:01:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1154072220, now seen corresponding path program 7 times [2023-12-02 15:01:08,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:01:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340864037] [2023-12-02 15:01:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:01:08,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:01:08,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137191634] [2023-12-02 15:01:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:01:08,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:08,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:08,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:01:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:09,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 3714 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:01:09,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:01:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2023-12-02 15:01:10,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2023-12-02 15:01:10,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340864037] [2023-12-02 15:01:10,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:01:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137191634] [2023-12-02 15:01:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137191634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:01:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438347114] [2023-12-02 15:01:10,699 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 15:01:10,699 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:01:10,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:01:10,700 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:01:10,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:01:11,403 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:01:12,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12268#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_209| Int) (|v_ULTIMATE.start_main_~j~0#1_954| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_209|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_954|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 15:01:12,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:01:12,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:01:12,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-12-02 15:01:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923273050] [2023-12-02 15:01:12,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:01:12,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 15:01:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:01:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 15:01:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1218, Invalid=2088, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 15:01:12,060 INFO L87 Difference]: Start difference. First operand 553 states and 597 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:01:13,470 INFO L93 Difference]: Finished difference Result 1724 states and 2294 transitions. [2023-12-02 15:01:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 15:01:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2023-12-02 15:01:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:01:13,475 INFO L225 Difference]: With dead ends: 1724 [2023-12-02 15:01:13,475 INFO L226 Difference]: Without dead ends: 1196 [2023-12-02 15:01:13,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1403 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2368, Invalid=4112, Unknown=0, NotChecked=0, Total=6480 [2023-12-02 15:01:13,479 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 912 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:01:13,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 138 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:01:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2023-12-02 15:01:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1105. [2023-12-02 15:01:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.0625) internal successors, (1173), 1104 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1173 transitions. [2023-12-02 15:01:13,649 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1173 transitions. Word has length 487 [2023-12-02 15:01:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:01:13,649 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1173 transitions. [2023-12-02 15:01:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:01:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1173 transitions. [2023-12-02 15:01:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2023-12-02 15:01:13,692 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:01:13,692 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:01:13,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:01:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:13,896 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:01:13,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:01:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -74103140, now seen corresponding path program 8 times [2023-12-02 15:01:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:01:13,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383301694] [2023-12-02 15:01:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:01:14,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:01:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342341651] [2023-12-02 15:01:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:01:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:14,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:14,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_992ec597-e70a-4808-bff9-b92597e03f0e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process