./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/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_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/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_b321b259-675b-4a72-976b-71a3d4e2ee36/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 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:41:12,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:41:12,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:41:12,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:41:12,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:41:12,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:41:12,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:41:12,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:41:12,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:41:12,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:41:12,777 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:41:12,777 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:41:12,778 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:41:12,778 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:41:12,779 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:41:12,779 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:41:12,779 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:41:12,780 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:41:12,780 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:41:12,781 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:41:12,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:41:12,785 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:41:12,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:41:12,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:41:12,787 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:41:12,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:41:12,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:41:12,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:41:12,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:41:12,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:41:12,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:41:12,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:41:12,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:41:12,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:41:12,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:41:12,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:41:12,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:41:12,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:12,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:41:12,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:41:12,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:41:12,794 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:41:12,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:41:12,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:41:12,796 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:41:12,797 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:41:12,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:41:12,797 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_b321b259-675b-4a72-976b-71a3d4e2ee36/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2023-12-02 19:41:13,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:41:13,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:41:13,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:41:13,082 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:41:13,083 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:41:13,084 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2023-12-02 19:41:16,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:41:16,332 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:41:16,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2023-12-02 19:41:16,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/data/2efc3be4e/24bf37687a9e46c0aafd2c4ddcda1637/FLAG3d547f420 [2023-12-02 19:41:16,370 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/data/2efc3be4e/24bf37687a9e46c0aafd2c4ddcda1637 [2023-12-02 19:41:16,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:41:16,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:41:16,374 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:16,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:41:16,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:41:16,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e00d7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16, skipping insertion in model container [2023-12-02 19:41:16,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:41:16,543 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_b321b259-675b-4a72-976b-71a3d4e2ee36/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2023-12-02 19:41:16,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:16,570 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:41:16,582 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_b321b259-675b-4a72-976b-71a3d4e2ee36/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2023-12-02 19:41:16,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:16,610 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:41:16,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16 WrapperNode [2023-12-02 19:41:16,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:16,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:16,613 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:41:16,613 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:41:16,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,646 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-12-02 19:41:16,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:16,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:41:16,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:41:16,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:41:16,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:41:16,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:41:16,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:41:16,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:41:16,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (1/1) ... [2023-12-02 19:41:16,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:16,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:41:16,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:41:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:41:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:41:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:41:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:41:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:41:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:41:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:41:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:41:16,845 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:41:16,847 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:41:17,009 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:41:17,066 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:41:17,067 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 19:41:17,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:17 BoogieIcfgContainer [2023-12-02 19:41:17,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:41:17,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:41:17,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:41:17,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:41:17,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:41:16" (1/3) ... [2023-12-02 19:41:17,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc67b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:17, skipping insertion in model container [2023-12-02 19:41:17,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:16" (2/3) ... [2023-12-02 19:41:17,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc67b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:17, skipping insertion in model container [2023-12-02 19:41:17,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:17" (3/3) ... [2023-12-02 19:41:17,082 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2023-12-02 19:41:17,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:41:17,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:41:17,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:41:17,203 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;@7153bdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:41:17,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:41:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:41:17,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:17,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:17,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:17,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1384529227, now seen corresponding path program 1 times [2023-12-02 19:41:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627541440] [2023-12-02 19:41:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:17,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:17,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627541440] [2023-12-02 19:41:17,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627541440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:17,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:17,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:41:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839922650] [2023-12-02 19:41:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 19:41:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 19:41:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:41:17,483 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:17,520 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-12-02 19:41:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 19:41:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 19:41:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:17,533 INFO L225 Difference]: With dead ends: 22 [2023-12-02 19:41:17,533 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 19:41:17,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:41:17,541 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 19:41:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-02 19:41:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-12-02 19:41:17,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2023-12-02 19:41:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:17,581 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-12-02 19:41:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-12-02 19:41:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:41:17,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:17,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:17,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:41:17,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:17,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1556500332, now seen corresponding path program 1 times [2023-12-02 19:41:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330240221] [2023-12-02 19:41:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:17,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:17,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330240221] [2023-12-02 19:41:17,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330240221] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:17,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:17,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:41:17,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784299361] [2023-12-02 19:41:17,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:17,699 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:41:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:17,722 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-12-02 19:41:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:17,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:41:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:17,724 INFO L225 Difference]: With dead ends: 21 [2023-12-02 19:41:17,724 INFO L226 Difference]: Without dead ends: 12 [2023-12-02 19:41:17,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:41:17,727 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:17,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-02 19:41:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-02 19:41:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-12-02 19:41:17,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-12-02 19:41:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:17,734 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-12-02 19:41:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:41:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-12-02 19:41:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:41:17,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:17,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:41:17,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:17,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 605701945, now seen corresponding path program 1 times [2023-12-02 19:41:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819999372] [2023-12-02 19:41:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:17,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:17,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819999372] [2023-12-02 19:41:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819999372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473828340] [2023-12-02 19:41:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:17,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:41:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:17,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:41:17,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:18,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:18,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473828340] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:18,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552547730] [2023-12-02 19:41:18,091 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 19:41:18,091 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:18,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:18,107 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:18,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:18,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:18,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [552547730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:18,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:18,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2023-12-02 19:41:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799379360] [2023-12-02 19:41:18,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:18,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:41:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:41:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:41:18,865 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:18,927 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-02 19:41:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:41:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 19:41:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:18,928 INFO L225 Difference]: With dead ends: 23 [2023-12-02 19:41:18,928 INFO L226 Difference]: Without dead ends: 14 [2023-12-02 19:41:18,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:41:18,931 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:18,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-02 19:41:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-02 19:41:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-12-02 19:41:18,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2023-12-02 19:41:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:18,938 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-12-02 19:41:18,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-12-02 19:41:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:41:18,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:18,939 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:18,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:41:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:19,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:19,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1316150341, now seen corresponding path program 1 times [2023-12-02 19:41:19,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:19,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639486715] [2023-12-02 19:41:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:19,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:41:19,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639486715] [2023-12-02 19:41:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639486715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:19,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132240338] [2023-12-02 19:41:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:19,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:19,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:41:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:19,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:41:19,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:41:19,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:41:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132240338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696714277] [2023-12-02 19:41:19,350 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 19:41:19,351 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:19,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:19,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:19,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:19,724 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:20,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '292#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem8#1|))' at error location [2023-12-02 19:41:20,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:20,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 19:41:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128120465] [2023-12-02 19:41:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:41:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:41:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=129, Unknown=1, NotChecked=0, Total=182 [2023-12-02 19:41:20,058 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:20,086 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-12-02 19:41:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:41:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2023-12-02 19:41:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:20,087 INFO L225 Difference]: With dead ends: 28 [2023-12-02 19:41:20,087 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 19:41:20,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=129, Unknown=1, NotChecked=0, Total=182 [2023-12-02 19:41:20,089 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:20,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 19:41:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 19:41:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-02 19:41:20,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-12-02 19:41:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:20,096 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-02 19:41:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-02 19:41:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 19:41:20,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:20,097 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:20,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:41:20,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:20,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:20,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1566903328, now seen corresponding path program 2 times [2023-12-02 19:41:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:20,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430678321] [2023-12-02 19:41:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:20,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:41:20,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:20,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430678321] [2023-12-02 19:41:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430678321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:20,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141835821] [2023-12-02 19:41:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:41:20,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:20,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:20,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:20,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:41:20,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:41:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:20,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 19:41:20,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:20,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 19:41:20,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 19:41:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:41:20,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:20,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:41:20,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-12-02 19:41:20,804 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 19:41:20,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2023-12-02 19:41:20,834 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-12-02 19:41:20,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2023-12-02 19:41:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:41:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141835821] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365921382] [2023-12-02 19:41:20,941 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 19:41:20,942 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:20,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:20,942 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:20,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:21,281 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:21,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '462#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem8#1|))' at error location [2023-12-02 19:41:21,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:21,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:21,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-12-02 19:41:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857197208] [2023-12-02 19:41:21,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:21,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 19:41:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 19:41:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=379, Unknown=1, NotChecked=0, Total=462 [2023-12-02 19:41:21,662 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:21,860 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-12-02 19:41:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:41:21,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 15 [2023-12-02 19:41:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:21,861 INFO L225 Difference]: With dead ends: 33 [2023-12-02 19:41:21,861 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 19:41:21,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=668, Unknown=1, NotChecked=0, Total=812 [2023-12-02 19:41:21,863 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:21,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 19:41:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-12-02 19:41:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-12-02 19:41:21,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-12-02 19:41:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:21,870 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-12-02 19:41:21,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-12-02 19:41:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 19:41:21,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:21,871 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:21,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:41:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:22,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:22,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1212809743, now seen corresponding path program 1 times [2023-12-02 19:41:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022540155] [2023-12-02 19:41:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:41:22,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022540155] [2023-12-02 19:41:22,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022540155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450586390] [2023-12-02 19:41:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:22,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:22,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:41:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:22,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:41:22,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:41:22,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:41:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450586390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894278717] [2023-12-02 19:41:22,429 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:22,430 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:22,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:22,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:22,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:22,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:23,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:23,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:23,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-02 19:41:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345329909] [2023-12-02 19:41:23,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:23,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 19:41:23,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 19:41:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=334, Unknown=2, NotChecked=0, Total=462 [2023-12-02 19:41:23,348 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:23,396 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-02 19:41:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 19:41:23,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 20 [2023-12-02 19:41:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:23,398 INFO L225 Difference]: With dead ends: 42 [2023-12-02 19:41:23,398 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 19:41:23,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=334, Unknown=2, NotChecked=0, Total=462 [2023-12-02 19:41:23,400 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:23,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 19:41:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-02 19:41:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-12-02 19:41:23,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2023-12-02 19:41:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:23,410 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-12-02 19:41:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-12-02 19:41:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:41:23,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:23,412 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:23,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:41:23,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:41:23,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:23,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1532752908, now seen corresponding path program 2 times [2023-12-02 19:41:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:23,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139034290] [2023-12-02 19:41:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:41:23,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139034290] [2023-12-02 19:41:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139034290] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142032625] [2023-12-02 19:41:23,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:41:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:23,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:23,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:41:24,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:41:24,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:24,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 19:41:24,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 19:41:24,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:24,501 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 19:41:24,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 25 [2023-12-02 19:41:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 19:41:24,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142032625] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:24,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374027512] [2023-12-02 19:41:24,590 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:24,590 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:24,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:24,591 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:24,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:25,018 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:25,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '988#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:25,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:25,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2023-12-02 19:41:25,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124658230] [2023-12-02 19:41:25,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:25,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 19:41:25,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 19:41:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1016, Unknown=2, NotChecked=0, Total=1190 [2023-12-02 19:41:25,573 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:26,018 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-12-02 19:41:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 19:41:26,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 27 [2023-12-02 19:41:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:26,019 INFO L225 Difference]: With dead ends: 59 [2023-12-02 19:41:26,019 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 19:41:26,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=2039, Unknown=2, NotChecked=0, Total=2450 [2023-12-02 19:41:26,022 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:26,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 19:41:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2023-12-02 19:41:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-12-02 19:41:26,031 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2023-12-02 19:41:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:26,031 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-12-02 19:41:26,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-12-02 19:41:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:41:26,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:26,032 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:26,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:41:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 19:41:26,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:26,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1682204803, now seen corresponding path program 3 times [2023-12-02 19:41:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799694376] [2023-12-02 19:41:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:26,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:26,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799694376] [2023-12-02 19:41:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799694376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332532014] [2023-12-02 19:41:26,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:41:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:26,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:41:26,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:41:26,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:26,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:41:26,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:26,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:27,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332532014] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630343571] [2023-12-02 19:41:27,111 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:27,111 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:27,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:27,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:27,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:27,446 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:27,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1365#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:27,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:27,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-12-02 19:41:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372019539] [2023-12-02 19:41:27,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:27,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 19:41:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 19:41:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=918, Unknown=2, NotChecked=0, Total=1406 [2023-12-02 19:41:27,872 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:27,942 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-12-02 19:41:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 19:41:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 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 30 [2023-12-02 19:41:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:27,944 INFO L225 Difference]: With dead ends: 62 [2023-12-02 19:41:27,944 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 19:41:27,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=918, Unknown=2, NotChecked=0, Total=1406 [2023-12-02 19:41:27,946 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:27,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:41:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 19:41:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-12-02 19:41:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-12-02 19:41:27,956 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2023-12-02 19:41:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:27,956 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-12-02 19:41:27,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-12-02 19:41:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:41:27,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:27,959 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:27,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:41:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:28,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:28,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1569950296, now seen corresponding path program 4 times [2023-12-02 19:41:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870241989] [2023-12-02 19:41:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:29,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870241989] [2023-12-02 19:41:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870241989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417008533] [2023-12-02 19:41:29,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:41:29,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:29,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:29,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:29,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:41:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:29,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 19:41:29,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:29,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417008533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388412889] [2023-12-02 19:41:30,480 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:30,480 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:30,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:30,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:30,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:30,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:31,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1878#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:31,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:31,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:31,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-12-02 19:41:31,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510795454] [2023-12-02 19:41:31,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:31,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 19:41:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 19:41:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2704, Unknown=1, NotChecked=0, Total=4556 [2023-12-02 19:41:31,309 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:31,418 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2023-12-02 19:41:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 19:41:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 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 45 [2023-12-02 19:41:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:31,420 INFO L225 Difference]: With dead ends: 92 [2023-12-02 19:41:31,420 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 19:41:31,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1851, Invalid=2704, Unknown=1, NotChecked=0, Total=4556 [2023-12-02 19:41:31,423 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:31,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 19:41:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 19:41:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 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 19:41:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-12-02 19:41:31,444 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 45 [2023-12-02 19:41:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:31,445 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-12-02 19:41:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-12-02 19:41:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 19:41:31,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:31,448 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 19:41:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:31,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:31,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -831920200, now seen corresponding path program 5 times [2023-12-02 19:41:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:31,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322469267] [2023-12-02 19:41:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:41:34,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322469267] [2023-12-02 19:41:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322469267] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592133606] [2023-12-02 19:41:34,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:41:34,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:34,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:34,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:41:34,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:41:34,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:34,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 19:41:34,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:34,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 19:41:35,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-12-02 19:41:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-12-02 19:41:35,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:35,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:41:35,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2023-12-02 19:41:36,032 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 19:41:36,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-12-02 19:41:36,051 INFO L349 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-12-02 19:41:36,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2023-12-02 19:41:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-12-02 19:41:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592133606] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520070742] [2023-12-02 19:41:36,223 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:36,223 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:36,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:36,223 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:36,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:36,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:37,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2705#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:37,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:37,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:37,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 8, 8] total 74 [2023-12-02 19:41:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121490288] [2023-12-02 19:41:37,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:37,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-02 19:41:37,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-02 19:41:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1907, Invalid=4733, Unknown=2, NotChecked=0, Total=6642 [2023-12-02 19:41:37,275 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 75 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:40,195 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2023-12-02 19:41:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 19:41:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 74 states have internal predecessors, (104), 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 75 [2023-12-02 19:41:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:40,196 INFO L225 Difference]: With dead ends: 98 [2023-12-02 19:41:40,197 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 19:41:40,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5661, Invalid=15217, Unknown=2, NotChecked=0, Total=20880 [2023-12-02 19:41:40,204 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:40,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:41:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 19:41:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-12-02 19:41:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-12-02 19:41:40,218 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2023-12-02 19:41:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:40,218 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-12-02 19:41:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-12-02 19:41:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 19:41:40,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:40,220 INFO L195 NwaCegarLoop]: trace histogram [59, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:40,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:41:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 19:41:40,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1690198007, now seen corresponding path program 6 times [2023-12-02 19:41:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:40,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704333376] [2023-12-02 19:41:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:41:42,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704333376] [2023-12-02 19:41:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704333376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:42,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086992334] [2023-12-02 19:41:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:41:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:42,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:42,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:41:43,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:41:43,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:41:43,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 19:41:43,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:41:43,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:41:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:41:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086992334] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:41:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941546673] [2023-12-02 19:41:46,661 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:41:46,661 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:41:46,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:41:46,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:41:46,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:41:46,858 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:41:47,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3751#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:41:47,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:41:47,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:41:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2023-12-02 19:41:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670670492] [2023-12-02 19:41:47,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:41:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-12-02 19:41:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-12-02 19:41:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7524, Invalid=9245, Unknown=1, NotChecked=0, Total=16770 [2023-12-02 19:41:47,481 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:47,650 INFO L93 Difference]: Finished difference Result 162 states and 226 transitions. [2023-12-02 19:41:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-02 19:41:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 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 80 [2023-12-02 19:41:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:47,652 INFO L225 Difference]: With dead ends: 162 [2023-12-02 19:41:47,652 INFO L226 Difference]: Without dead ends: 142 [2023-12-02 19:41:47,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7524, Invalid=9245, Unknown=1, NotChecked=0, Total=16770 [2023-12-02 19:41:47,654 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:47,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-02 19:41:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-12-02 19:41:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2023-12-02 19:41:47,672 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 80 [2023-12-02 19:41:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:47,673 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2023-12-02 19:41:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:41:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2023-12-02 19:41:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 19:41:47,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:47,674 INFO L195 NwaCegarLoop]: trace histogram [120, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:47,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:41:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 19:41:47,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:47,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1224183940, now seen corresponding path program 7 times [2023-12-02 19:41:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:47,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318858471] [2023-12-02 19:41:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:41:55,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:55,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318858471] [2023-12-02 19:41:55,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318858471] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:55,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449074851] [2023-12-02 19:41:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:41:55,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:55,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:55,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:41:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:55,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 122 conjunts are in the unsatisfiable core [2023-12-02 19:41:55,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:41:55,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:42:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:42:10,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449074851] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:42:10,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596842786] [2023-12-02 19:42:10,290 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:42:10,291 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:42:10,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:42:10,291 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:42:10,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:42:10,535 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:42:11,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5407#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:42:11,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:42:11,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:42:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2023-12-02 19:42:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456114392] [2023-12-02 19:42:11,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:42:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2023-12-02 19:42:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2023-12-02 19:42:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29911, Invalid=33339, Unknown=2, NotChecked=0, Total=63252 [2023-12-02 19:42:11,468 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:42:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:12,348 INFO L93 Difference]: Finished difference Result 284 states and 409 transitions. [2023-12-02 19:42:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2023-12-02 19:42:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 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 141 [2023-12-02 19:42:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:12,352 INFO L225 Difference]: With dead ends: 284 [2023-12-02 19:42:12,352 INFO L226 Difference]: Without dead ends: 264 [2023-12-02 19:42:12,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=29911, Invalid=33339, Unknown=2, NotChecked=0, Total=63252 [2023-12-02 19:42:12,356 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:12,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:42:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-12-02 19:42:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-12-02 19:42:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:42:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2023-12-02 19:42:12,391 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 141 [2023-12-02 19:42:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:12,392 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2023-12-02 19:42:12,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:42:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2023-12-02 19:42:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-12-02 19:42:12,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:12,396 INFO L195 NwaCegarLoop]: trace histogram [242, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:12,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:42:12,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:42:12,597 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:12,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 455555748, now seen corresponding path program 8 times [2023-12-02 19:42:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:12,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034593004] [2023-12-02 19:42:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:42:43,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034593004] [2023-12-02 19:42:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034593004] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824651179] [2023-12-02 19:42:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:42:43,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:43,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:43,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:43,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:42:44,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:42:44,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:42:44,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 19:42:44,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2023-12-02 19:42:45,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:42:46,334 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 19:42:46,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 25 [2023-12-02 19:42:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2023-12-02 19:42:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824651179] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:42:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851341904] [2023-12-02 19:42:46,790 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:42:46,791 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:42:46,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:42:46,791 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:42:46,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:42:47,064 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:42:48,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8300#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:42:48,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:42:48,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:42:48,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [244, 10, 10] total 261 [2023-12-02 19:42:48,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617200098] [2023-12-02 19:42:48,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:42:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2023-12-02 19:42:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2023-12-02 19:42:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29972, Invalid=42118, Unknown=2, NotChecked=0, Total=72092 [2023-12-02 19:42:48,895 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 262 states, 262 states have (on average 1.118320610687023) internal successors, (293), 261 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:43:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:16,306 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2023-12-02 19:43:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-12-02 19:43:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 1.118320610687023) internal successors, (293), 261 states have internal predecessors, (293), 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 263 [2023-12-02 19:43:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:16,308 INFO L225 Difference]: With dead ends: 305 [2023-12-02 19:43:16,309 INFO L226 Difference]: Without dead ends: 274 [2023-12-02 19:43:16,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37313 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=90009, Invalid=173671, Unknown=2, NotChecked=0, Total=263682 [2023-12-02 19:43:16,320 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:16,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 107 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:43:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-12-02 19:43:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2023-12-02 19:43:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:43:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2023-12-02 19:43:16,356 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2023-12-02 19:43:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:16,356 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2023-12-02 19:43:16,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 1.118320610687023) internal successors, (293), 261 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:43:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2023-12-02 19:43:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 19:43:16,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:16,360 INFO L195 NwaCegarLoop]: trace histogram [243, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:43:16,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 19:43:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:43:16,561 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:43:16,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1407819371, now seen corresponding path program 9 times [2023-12-02 19:43:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:16,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111246901] [2023-12-02 19:43:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:43:46,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111246901] [2023-12-02 19:43:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111246901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744229318] [2023-12-02 19:43:46,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:43:46,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:46,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:46,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:43:47,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:43:47,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:43:47,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 245 conjunts are in the unsatisfiable core [2023-12-02 19:43:47,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:43:47,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:44:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:44:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744229318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:44:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563262565] [2023-12-02 19:44:44,533 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:44:44,533 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:44:44,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:44:44,534 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:44:44,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:44:44,747 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:44:46,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11962#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:44:46,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:44:46,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:44:46,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 245, 245] total 490 [2023-12-02 19:44:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478346896] [2023-12-02 19:44:46,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:44:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 491 states [2023-12-02 19:44:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:44:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 491 interpolants. [2023-12-02 19:44:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120316, Invalid=127189, Unknown=1, NotChecked=0, Total=247506 [2023-12-02 19:44:46,352 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:44:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:44:49,693 INFO L93 Difference]: Finished difference Result 534 states and 782 transitions. [2023-12-02 19:44:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2023-12-02 19:44:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 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 266 [2023-12-02 19:44:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:44:49,697 INFO L225 Difference]: With dead ends: 534 [2023-12-02 19:44:49,697 INFO L226 Difference]: Without dead ends: 512 [2023-12-02 19:44:49,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6100 ImplicationChecksByTransitivity, 76.7s TimeCoverageRelationStatistics Valid=120316, Invalid=127189, Unknown=1, NotChecked=0, Total=247506 [2023-12-02 19:44:49,708 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:44:49,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:44:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-12-02 19:44:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2023-12-02 19:44:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.00587084148728) internal successors, (514), 511 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:44:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2023-12-02 19:44:49,768 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 266 [2023-12-02 19:44:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:44:49,769 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2023-12-02 19:44:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:44:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2023-12-02 19:44:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-12-02 19:44:49,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:44:49,782 INFO L195 NwaCegarLoop]: trace histogram [488, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:44:49,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:44:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 19:44:49,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:44:49,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:44:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 598522832, now seen corresponding path program 10 times [2023-12-02 19:44:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:44:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991504077] [2023-12-02 19:44:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:44:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:44:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:47:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:47:04,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:47:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991504077] [2023-12-02 19:47:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991504077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:47:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787377878] [2023-12-02 19:47:04,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:47:04,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:47:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:47:04,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:47:04,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:47:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:47:05,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 4510 conjuncts, 490 conjunts are in the unsatisfiable core [2023-12-02 19:47:05,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:47:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:47:06,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:50:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787377878] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738231609] [2023-12-02 19:50:58,992 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:50:58,992 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:50:58,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:50:58,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:50:58,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:50:59,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:51:01,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18055#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 19:51:01,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:51:01,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:51:01,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [490, 490, 490] total 980 [2023-12-02 19:51:01,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216380197] [2023-12-02 19:51:01,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:01,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 981 states [2023-12-02 19:51:01,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:51:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 981 interpolants. [2023-12-02 19:51:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480711, Invalid=494444, Unknown=1, NotChecked=0, Total=975156 [2023-12-02 19:51:02,100 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:28,142 INFO L93 Difference]: Finished difference Result 1024 states and 1517 transitions. [2023-12-02 19:51:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 980 states. [2023-12-02 19:51:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 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 511 [2023-12-02 19:51:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:28,149 INFO L225 Difference]: With dead ends: 1024 [2023-12-02 19:51:28,149 INFO L226 Difference]: Without dead ends: 1002 [2023-12-02 19:51:28,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2021 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 986 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12225 ImplicationChecksByTransitivity, 311.3s TimeCoverageRelationStatistics Valid=480711, Invalid=494444, Unknown=1, NotChecked=0, Total=975156 [2023-12-02 19:51:28,196 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:28,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 19:51:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2023-12-02 19:51:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2023-12-02 19:51:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.002997002997003) internal successors, (1004), 1001 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1004 transitions. [2023-12-02 19:51:28,305 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1004 transitions. Word has length 511 [2023-12-02 19:51:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:28,306 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1004 transitions. [2023-12-02 19:51:28,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1004 transitions. [2023-12-02 19:51:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2023-12-02 19:51:28,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:28,314 INFO L195 NwaCegarLoop]: trace histogram [978, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:28,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 19:51:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b321b259-675b-4a72-976b-71a3d4e2ee36/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 19:51:28,514 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:51:28,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1318768880, now seen corresponding path program 11 times [2023-12-02 19:51:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:51:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402173526] [2023-12-02 19:51:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:51:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat