./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/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 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:20:29,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:20:29,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:20:29,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:20:29,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:20:29,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:20:29,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:20:29,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:20:29,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:20:29,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:20:29,364 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:20:29,365 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:20:29,365 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:20:29,366 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:20:29,366 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:20:29,367 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:20:29,367 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:20:29,368 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:20:29,368 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:20:29,369 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:20:29,369 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:20:29,370 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:20:29,371 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:20:29,371 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:20:29,372 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:20:29,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:20:29,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:20:29,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:20:29,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:20:29,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:20:29,374 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:20:29,374 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:20:29,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:20:29,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:20:29,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:20:29,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:20:29,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:20:29,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:20:29,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:20:29,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:20:29,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:20:29,377 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:20:29,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:20:29,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:20:29,377 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:20:29,377 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:20:29,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:20:29,378 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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a [2023-12-02 16:20:29,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:20:29,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:20:29,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:20:29,608 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:20:29,608 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:20:29,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-12-02 16:20:32,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:20:32,561 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:20:32,561 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-12-02 16:20:32,569 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/data/109bff1ff/84b748ee967a41fca022d9401d09c63a/FLAG5c2d69a68 [2023-12-02 16:20:32,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/data/109bff1ff/84b748ee967a41fca022d9401d09c63a [2023-12-02 16:20:32,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:20:32,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:20:32,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:20:32,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:20:32,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:20:32,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d3e73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32, skipping insertion in model container [2023-12-02 16:20:32,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:20:32,771 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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2023-12-02 16:20:32,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:20:32,795 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:20:32,807 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_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2023-12-02 16:20:32,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:20:32,828 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:20:32,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32 WrapperNode [2023-12-02 16:20:32,828 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:20:32,829 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:20:32,829 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:20:32,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:20:32,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,862 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-12-02 16:20:32,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:20:32,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:20:32,864 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:20:32,864 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:20:32,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:20:32,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:20:32,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:20:32,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:20:32,890 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (1/1) ... [2023-12-02 16:20:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:20:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:32,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:20:32,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:20:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:20:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:20:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:20:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:20:33,023 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:20:33,026 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:20:33,145 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:20:33,181 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:20:33,182 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 16:20:33,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:33 BoogieIcfgContainer [2023-12-02 16:20:33,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:20:33,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:20:33,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:20:33,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:20:33,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:20:32" (1/3) ... [2023-12-02 16:20:33,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273501cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:33, skipping insertion in model container [2023-12-02 16:20:33,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:32" (2/3) ... [2023-12-02 16:20:33,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273501cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:33, skipping insertion in model container [2023-12-02 16:20:33,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:33" (3/3) ... [2023-12-02 16:20:33,192 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2023-12-02 16:20:33,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:20:33,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:20:33,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:20:33,260 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;@17d6104c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:20:33,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:20:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 16:20:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:20:33,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:33,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:33,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:33,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash -583452026, now seen corresponding path program 1 times [2023-12-02 16:20:33,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:33,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807195954] [2023-12-02 16:20:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:33,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:33,407 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 16:20:33,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807195954] [2023-12-02 16:20:33,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807195954] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:33,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:33,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:20:33,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293998112] [2023-12-02 16:20:33,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:20:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:20:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:20:33,445 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:20:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:33,471 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-12-02 16:20:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:20:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:20:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:33,482 INFO L225 Difference]: With dead ends: 18 [2023-12-02 16:20:33,482 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 16:20:33,485 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 16:20:33,488 INFO L413 NwaCegarLoop]: 8 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, 8 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 16:20:33,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 16:20:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-02 16:20:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 16:20:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-12-02 16:20:33,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-12-02 16:20:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:33,514 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-12-02 16:20:33,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 16:20:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-12-02 16:20:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 16:20:33,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:33,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:33,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:20:33,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:33,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 117723461, now seen corresponding path program 1 times [2023-12-02 16:20:33,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:33,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372558569] [2023-12-02 16:20:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:33,609 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 16:20:33,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:33,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372558569] [2023-12-02 16:20:33,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372558569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:33,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:20:33,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:20:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8316969] [2023-12-02 16:20:33,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:20:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:20:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:20:33,613 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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 16:20:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:33,630 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-12-02 16:20:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:20:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 16:20:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:33,632 INFO L225 Difference]: With dead ends: 19 [2023-12-02 16:20:33,632 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 16:20:33,633 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 16:20:33,634 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 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 16:20:33,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 16:20:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-02 16:20:33,639 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 16:20:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-12-02 16:20:33,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2023-12-02 16:20:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:33,640 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-12-02 16:20:33,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 16:20:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-12-02 16:20:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:20:33,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:33,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:20:33,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:33,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash -903641258, now seen corresponding path program 1 times [2023-12-02 16:20:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:33,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000673019] [2023-12-02 16:20:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:33,757 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 16:20:33,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000673019] [2023-12-02 16:20:33,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000673019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974828421] [2023-12-02 16:20:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:33,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:33,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:33,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:20:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:33,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:20:33,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:33,872 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 16:20:33,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:33,895 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 16:20:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974828421] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517075653] [2023-12-02 16:20:33,917 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 16:20:33,917 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:33,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:33,926 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:33,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:34,353 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:34,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1517075653] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:20:34,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:34,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2023-12-02 16:20:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111999014] [2023-12-02 16:20:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:20:34,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:20:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:20:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:20:34,506 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 16:20:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:34,560 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-12-02 16:20:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:20:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 16:20:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:34,561 INFO L225 Difference]: With dead ends: 20 [2023-12-02 16:20:34,561 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 16:20:34,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 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 16:20:34,563 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:34,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 16:20:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 16:20:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 16:20:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-02 16:20:34,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2023-12-02 16:20:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:34,568 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-02 16:20:34,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 16:20:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-02 16:20:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 16:20:34,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:34,569 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:34,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:20:34,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:34,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:34,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:34,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1919282960, now seen corresponding path program 1 times [2023-12-02 16:20:34,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:34,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560366498] [2023-12-02 16:20:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:34,882 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 16:20:34,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560366498] [2023-12-02 16:20:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560366498] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313618796] [2023-12-02 16:20:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:34,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:34,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:20:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:34,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:20:34,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:34,956 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 16:20:34,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:34,975 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 16:20:34,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313618796] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502798605] [2023-12-02 16:20:34,978 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 16:20:34,978 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:34,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:34,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:34,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:35,280 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:35,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '266#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 16:20:35,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:35,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:35,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 16:20:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601248119] [2023-12-02 16:20:35,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:20:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:35,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:20:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2023-12-02 16:20:35,547 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16:20:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:35,573 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-12-02 16:20:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:20:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 11 [2023-12-02 16:20:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:35,574 INFO L225 Difference]: With dead ends: 26 [2023-12-02 16:20:35,575 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 16:20:35,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2023-12-02 16:20:35,576 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 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 16:20:35,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 16:20:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 16:20:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 16:20:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-12-02 16:20:35,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-12-02 16:20:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:35,581 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-12-02 16:20:35,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16:20:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-02 16:20:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 16:20:35,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:35,582 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:35,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:20:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:35,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:35,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1343003265, now seen corresponding path program 2 times [2023-12-02 16:20:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:35,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557874786] [2023-12-02 16:20:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:35,911 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 16:20:35,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557874786] [2023-12-02 16:20:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557874786] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881410234] [2023-12-02 16:20:35,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:20:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:35,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:35,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:20:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:20:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:35,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 16:20:35,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:36,004 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 16:20:36,082 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 16:20:36,169 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 16:20:36,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:36,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:20:36,235 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 16:20:36,254 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:20:36,255 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 16:20:36,285 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-12-02 16:20:36,285 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 16:20:36,383 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 16:20:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881410234] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:36,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337688348] [2023-12-02 16:20:36,386 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 16:20:36,386 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:36,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:36,387 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:36,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:36,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:36,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 16:20:36,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:36,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-12-02 16:20:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054391311] [2023-12-02 16:20:36,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:36,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:20:36,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:20:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=355, Unknown=2, NotChecked=0, Total=420 [2023-12-02 16:20:36,929 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 16:20:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:37,129 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-12-02 16:20:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:20:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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) Word has length 14 [2023-12-02 16:20:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:37,130 INFO L225 Difference]: With dead ends: 30 [2023-12-02 16:20:37,130 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 16:20:37,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=632, Unknown=2, NotChecked=0, Total=756 [2023-12-02 16:20:37,133 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:37,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 27 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:20:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 16:20:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-12-02 16:20:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:20:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-02 16:20:37,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2023-12-02 16:20:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:37,139 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-02 16:20:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 16:20:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-02 16:20:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 16:20:37,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:37,140 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:37,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 16:20:37,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:37,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:37,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1675875919, now seen corresponding path program 1 times [2023-12-02 16:20:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:37,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570629164] [2023-12-02 16:20:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:37,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:20:37,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570629164] [2023-12-02 16:20:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570629164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735084193] [2023-12-02 16:20:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:37,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:37,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:37,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:37,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:20:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:37,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:20:37,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:20:37,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:20:37,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735084193] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:37,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302323291] [2023-12-02 16:20:37,628 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:37,628 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:37,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:37,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:37,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:37,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:38,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '635#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:38,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:38,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:38,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-02 16:20:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895471304] [2023-12-02 16:20:38,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:20:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:20:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=331, Unknown=3, NotChecked=0, Total=462 [2023-12-02 16:20:38,264 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 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 16:20:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:38,290 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-02 16:20:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:20:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 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 18 [2023-12-02 16:20:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:38,291 INFO L225 Difference]: With dead ends: 38 [2023-12-02 16:20:38,292 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 16:20:38,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=331, Unknown=3, NotChecked=0, Total=462 [2023-12-02 16:20:38,293 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:38,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 16:20:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 16:20:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 16:20:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-02 16:20:38,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2023-12-02 16:20:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:38,300 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-02 16:20:38,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 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 16:20:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-02 16:20:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:20:38,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:38,301 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:38,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 16:20:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:38,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1957243870, now seen corresponding path program 2 times [2023-12-02 16:20:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:38,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995156761] [2023-12-02 16:20:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:20:38,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995156761] [2023-12-02 16:20:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995156761] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573969146] [2023-12-02 16:20:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:20:38,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:38,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:38,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:38,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:20:38,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:20:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:38,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:20:38,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 16:20:38,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 16:20:38,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573969146] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538167903] [2023-12-02 16:20:38,998 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:38,999 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:38,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:38,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:38,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:39,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:39,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '909#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:39,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:39,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-12-02 16:20:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730417641] [2023-12-02 16:20:39,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:39,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 16:20:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 16:20:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=603, Unknown=3, NotChecked=0, Total=756 [2023-12-02 16:20:39,668 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 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 16:20:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:39,877 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-12-02 16:20:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:20:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 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 25 [2023-12-02 16:20:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:39,878 INFO L225 Difference]: With dead ends: 46 [2023-12-02 16:20:39,878 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 16:20:39,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=1266, Unknown=3, NotChecked=0, Total=1640 [2023-12-02 16:20:39,879 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:39,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 16:20:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-02 16:20:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 16:20:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-02 16:20:39,886 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-12-02 16:20:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:39,886 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-02 16:20:39,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 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 16:20:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-02 16:20:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:20:39,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:39,887 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:39,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:20:40,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:40,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:40,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1672974007, now seen corresponding path program 3 times [2023-12-02 16:20:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:40,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674929078] [2023-12-02 16:20:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:40,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:40,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:40,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674929078] [2023-12-02 16:20:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674929078] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041859680] [2023-12-02 16:20:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:20:40,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:40,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:40,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:40,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:20:40,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:20:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:40,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 16:20:40,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:40,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041859680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039533290] [2023-12-02 16:20:40,781 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:40,781 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:40,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:40,782 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:40,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:41,030 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:41,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1254#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:41,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:41,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:41,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-12-02 16:20:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758473939] [2023-12-02 16:20:41,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:41,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 16:20:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 16:20:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=915, Unknown=3, NotChecked=0, Total=1406 [2023-12-02 16:20:41,368 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:20:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:41,411 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-12-02 16:20:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 16:20:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 16:20:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:41,412 INFO L225 Difference]: With dead ends: 58 [2023-12-02 16:20:41,412 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 16:20:41,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=488, Invalid=915, Unknown=3, NotChecked=0, Total=1406 [2023-12-02 16:20:41,414 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:41,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:20:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 16:20:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-02 16:20:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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 16:20:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-02 16:20:41,424 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 28 [2023-12-02 16:20:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:41,425 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-02 16:20:41,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:20:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-02 16:20:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:20:41,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:41,426 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:41,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:20:41,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:41,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:41,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1122137960, now seen corresponding path program 4 times [2023-12-02 16:20:41,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:41,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139123079] [2023-12-02 16:20:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:41,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:42,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:42,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139123079] [2023-12-02 16:20:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139123079] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650513321] [2023-12-02 16:20:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:20:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:42,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:42,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:20:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:42,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 16:20:42,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:42,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650513321] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793251566] [2023-12-02 16:20:43,564 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:43,564 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:43,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:43,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:43,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:43,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:44,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1749#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:44,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:44,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:44,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-12-02 16:20:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947626757] [2023-12-02 16:20:44,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:44,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 16:20:44,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 16:20:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1853, Invalid=2700, Unknown=3, NotChecked=0, Total=4556 [2023-12-02 16:20:44,264 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 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 16:20:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:44,378 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2023-12-02 16:20:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 16:20:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 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 43 [2023-12-02 16:20:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:44,380 INFO L225 Difference]: With dead ends: 88 [2023-12-02 16:20:44,380 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 16:20:44,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1853, Invalid=2700, Unknown=3, NotChecked=0, Total=4556 [2023-12-02 16:20:44,383 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:44,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:20:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 16:20:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-02 16:20:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 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 16:20:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-12-02 16:20:44,400 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 43 [2023-12-02 16:20:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-12-02 16:20:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 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 16:20:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-12-02 16:20:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 16:20:44,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:44,403 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:44,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:20:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:44,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:44,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash -176401528, now seen corresponding path program 5 times [2023-12-02 16:20:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:44,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289884601] [2023-12-02 16:20:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:47,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289884601] [2023-12-02 16:20:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289884601] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356013876] [2023-12-02 16:20:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:20:47,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:47,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:47,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:47,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:20:47,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:20:47,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:47,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 16:20:47,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:47,334 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 16:20:47,771 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 16:20:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-12-02 16:20:47,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:48,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:20:48,124 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 16:20:48,135 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:20:48,135 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 24 treesize of output 18 [2023-12-02 16:20:48,163 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-12-02 16:20:48,163 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 86 treesize of output 78 [2023-12-02 16:20:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-12-02 16:20:48,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356013876] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:48,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403813826] [2023-12-02 16:20:48,733 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:48,733 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:48,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:48,734 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:48,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:48,958 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:49,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2556#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:49,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:49,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:49,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 72 [2023-12-02 16:20:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738243214] [2023-12-02 16:20:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-02 16:20:49,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-02 16:20:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=4427, Unknown=3, NotChecked=0, Total=6320 [2023-12-02 16:20:49,603 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 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 16:20:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:52,114 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2023-12-02 16:20:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 16:20:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 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 73 [2023-12-02 16:20:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:52,116 INFO L225 Difference]: With dead ends: 93 [2023-12-02 16:20:52,116 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 16:20:52,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5629, Invalid=14390, Unknown=3, NotChecked=0, Total=20022 [2023-12-02 16:20:52,125 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:52,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:20:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 16:20:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-12-02 16:20:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 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 16:20:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-12-02 16:20:52,139 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2023-12-02 16:20:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:52,139 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-12-02 16:20:52,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 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 16:20:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-12-02 16:20:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:20:52,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:52,141 INFO L195 NwaCegarLoop]: trace histogram [59, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:52,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:20:52,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:20:52,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:52,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:52,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1301889930, now seen corresponding path program 6 times [2023-12-02 16:20:52,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:52,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928550702] [2023-12-02 16:20:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:52,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:20:54,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:54,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928550702] [2023-12-02 16:20:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928550702] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:54,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133957856] [2023-12-02 16:20:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:20:54,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:54,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:54,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:54,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:20:54,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:20:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:54,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:20:54,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-12-02 16:20:54,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-12-02 16:20:54,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133957856] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992869435] [2023-12-02 16:20:54,885 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:20:54,885 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:54,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:54,885 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:54,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:55,057 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:55,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3522#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:20:55,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:55,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 7, 7] total 70 [2023-12-02 16:20:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641753423] [2023-12-02 16:20:55,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-02 16:20:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-02 16:20:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=4050, Unknown=3, NotChecked=0, Total=6006 [2023-12-02 16:20:55,659 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 70 states have internal predecessors, (95), 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 16:20:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:57,582 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-12-02 16:20:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-12-02 16:20:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 70 states have internal predecessors, (95), 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 77 [2023-12-02 16:20:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:57,583 INFO L225 Difference]: With dead ends: 106 [2023-12-02 16:20:57,583 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 16:20:57,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3288 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5853, Invalid=13050, Unknown=3, NotChecked=0, Total=18906 [2023-12-02 16:20:57,588 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:57,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:20:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 16:20:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 16:20:57,599 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 16:20:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-12-02 16:20:57,600 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2023-12-02 16:20:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:57,600 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-12-02 16:20:57,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 70 states have internal predecessors, (95), 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 16:20:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-12-02 16:20:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 16:20:57,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:57,601 INFO L195 NwaCegarLoop]: trace histogram [60, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:20:57,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 16:20:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:20:57,802 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -171130989, now seen corresponding path program 7 times [2023-12-02 16:20:57,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388309655] [2023-12-02 16:20:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 16:21:00,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:21:00,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388309655] [2023-12-02 16:21:00,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388309655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:00,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630761715] [2023-12-02 16:21:00,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:21:00,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:00,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:00,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:00,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:21:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:00,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 16:21:00,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 16:21:00,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 16:21:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630761715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:21:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54706895] [2023-12-02 16:21:03,842 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:21:03,842 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:21:03,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:21:03,843 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:21:03,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:21:04,022 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:21:04,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4580#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:21:04,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:21:04,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:04,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 124 [2023-12-02 16:21:04,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007149589] [2023-12-02 16:21:04,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:04,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-12-02 16:21:04,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:21:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-12-02 16:21:04,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7773, Invalid=9516, Unknown=3, NotChecked=0, Total=17292 [2023-12-02 16:21:04,575 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 125 states, 125 states have (on average 1.08) internal successors, (135), 124 states have internal predecessors, (135), 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 16:21:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:04,748 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2023-12-02 16:21:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-12-02 16:21:04,749 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.08) internal successors, (135), 124 states have internal predecessors, (135), 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 16:21:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:04,750 INFO L225 Difference]: With dead ends: 162 [2023-12-02 16:21:04,750 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 16:21:04,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7773, Invalid=9516, Unknown=3, NotChecked=0, Total=17292 [2023-12-02 16:21:04,752 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:04,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:21:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 16:21:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-12-02 16:21:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 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 16:21:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2023-12-02 16:21:04,776 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 80 [2023-12-02 16:21:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:04,776 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2023-12-02 16:21:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.08) internal successors, (135), 124 states have internal predecessors, (135), 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 16:21:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2023-12-02 16:21:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 16:21:04,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:04,779 INFO L195 NwaCegarLoop]: trace histogram [122, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:21:04,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 16:21:04,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:04,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:21:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1470178957, now seen corresponding path program 8 times [2023-12-02 16:21:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:21:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030862552] [2023-12-02 16:21:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:04,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:21:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7522 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 16:21:12,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:21:12,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030862552] [2023-12-02 16:21:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030862552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:12,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199056671] [2023-12-02 16:21:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:21:12,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:12,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:12,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:21:12,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 16:21:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:21:12,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:21:12,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:12,642 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 16:21:13,491 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 16:21:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7522 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2023-12-02 16:21:14,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:14,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:21:14,512 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 16:21:14,523 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:21:14,524 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 24 treesize of output 18 [2023-12-02 16:21:14,549 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-12-02 16:21:14,549 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 86 treesize of output 78 [2023-12-02 16:21:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7522 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2023-12-02 16:21:16,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199056671] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:21:16,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564076091] [2023-12-02 16:21:16,054 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:21:16,054 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:21:16,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:21:16,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:21:16,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:21:16,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:21:17,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6148#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:21:17,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:21:17,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 10, 10] total 142 [2023-12-02 16:21:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461141199] [2023-12-02 16:21:17,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-12-02 16:21:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:21:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-12-02 16:21:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7854, Invalid=14493, Unknown=3, NotChecked=0, Total=22350 [2023-12-02 16:21:17,136 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 143 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 142 states have internal predecessors, (173), 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 16:21:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:27,450 INFO L93 Difference]: Finished difference Result 206 states and 217 transitions. [2023-12-02 16:21:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-12-02 16:21:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 142 states have internal predecessors, (173), 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 142 [2023-12-02 16:21:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:27,452 INFO L225 Difference]: With dead ends: 206 [2023-12-02 16:21:27,452 INFO L226 Difference]: Without dead ends: 187 [2023-12-02 16:21:27,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14407 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=24064, Invalid=60905, Unknown=3, NotChecked=0, Total=84972 [2023-12-02 16:21:27,456 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:27,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 127 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:21:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-12-02 16:21:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 162. [2023-12-02 16:21:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 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 16:21:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2023-12-02 16:21:27,479 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 142 [2023-12-02 16:21:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:27,480 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2023-12-02 16:21:27,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 142 states have internal predecessors, (173), 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 16:21:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2023-12-02 16:21:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 16:21:27,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:27,482 INFO L195 NwaCegarLoop]: trace histogram [123, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:21:27,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:21:27,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:27,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:21:27,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1875982776, now seen corresponding path program 9 times [2023-12-02 16:21:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:21:27,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061461553] [2023-12-02 16:21:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:21:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7663 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:21:35,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:21:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061461553] [2023-12-02 16:21:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061461553] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492684616] [2023-12-02 16:21:35,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:21:35,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:35,621 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:35,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:21:35,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:21:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:21:35,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 125 conjunts are in the unsatisfiable core [2023-12-02 16:21:35,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7663 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:21:36,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7663 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:21:50,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492684616] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:21:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364777933] [2023-12-02 16:21:50,127 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:21:50,127 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:21:50,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:21:50,127 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:21:50,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:21:50,316 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:21:51,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8222#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:21:51,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:21:51,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 250 [2023-12-02 16:21:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907919967] [2023-12-02 16:21:51,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2023-12-02 16:21:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:21:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2023-12-02 16:21:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31398, Invalid=34905, Unknown=3, NotChecked=0, Total=66306 [2023-12-02 16:21:51,171 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 251 states, 251 states have (on average 1.0398406374501992) internal successors, (261), 250 states have internal predecessors, (261), 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 16:21:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:51,932 INFO L93 Difference]: Finished difference Result 324 states and 456 transitions. [2023-12-02 16:21:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-12-02 16:21:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 251 states have (on average 1.0398406374501992) internal successors, (261), 250 states have internal predecessors, (261), 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 147 [2023-12-02 16:21:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:51,934 INFO L225 Difference]: With dead ends: 324 [2023-12-02 16:21:51,934 INFO L226 Difference]: Without dead ends: 287 [2023-12-02 16:21:51,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=31398, Invalid=34905, Unknown=3, NotChecked=0, Total=66306 [2023-12-02 16:21:51,956 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:51,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:21:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-12-02 16:21:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-12-02 16:21:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 286 states have internal predecessors, (291), 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 16:21:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 291 transitions. [2023-12-02 16:21:51,989 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 291 transitions. Word has length 147 [2023-12-02 16:21:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:51,989 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 291 transitions. [2023-12-02 16:21:51,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 251 states have (on average 1.0398406374501992) internal successors, (261), 250 states have internal predecessors, (261), 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 16:21:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 291 transitions. [2023-12-02 16:21:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-02 16:21:51,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:51,991 INFO L195 NwaCegarLoop]: trace histogram [248, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:21:51,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:21:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:52,192 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:21:52,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1811637561, now seen corresponding path program 10 times [2023-12-02 16:21:52,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:21:52,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861273696] [2023-12-02 16:21:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:21:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30913 backedges. 0 proven. 30876 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:22:23,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:22:23,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861273696] [2023-12-02 16:22:23,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861273696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102093567] [2023-12-02 16:22:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:22:23,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:23,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:23,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:23,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:22:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:23,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 250 conjunts are in the unsatisfiable core [2023-12-02 16:22:23,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30913 backedges. 0 proven. 30876 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:22:24,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:23:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30913 backedges. 0 proven. 30876 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:23:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102093567] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:23:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977951127] [2023-12-02 16:23:21,868 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:23:21,869 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:23:21,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:23:21,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:23:21,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:23:22,036 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:23:23,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11504#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:23:23,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:23:23,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:23:23,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [250, 250, 250] total 500 [2023-12-02 16:23:23,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447598636] [2023-12-02 16:23:23,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:23:23,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 501 states [2023-12-02 16:23:23,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:23:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 501 interpolants. [2023-12-02 16:23:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125273, Invalid=132280, Unknown=3, NotChecked=0, Total=257556 [2023-12-02 16:23:23,532 INFO L87 Difference]: Start difference. First operand 287 states and 291 transitions. Second operand has 501 states, 501 states have (on average 1.0199600798403194) internal successors, (511), 500 states have internal predecessors, (511), 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 16:23:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:23:27,276 INFO L93 Difference]: Finished difference Result 574 states and 831 transitions. [2023-12-02 16:23:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 500 states. [2023-12-02 16:23:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 501 states, 501 states have (on average 1.0199600798403194) internal successors, (511), 500 states have internal predecessors, (511), 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 272 [2023-12-02 16:23:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:23:27,280 INFO L225 Difference]: With dead ends: 574 [2023-12-02 16:23:27,280 INFO L226 Difference]: Without dead ends: 537 [2023-12-02 16:23:27,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 506 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 77.3s TimeCoverageRelationStatistics Valid=125273, Invalid=132280, Unknown=3, NotChecked=0, Total=257556 [2023-12-02 16:23:27,291 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:23:27,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:23:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-12-02 16:23:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2023-12-02 16:23:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.0093283582089552) internal successors, (541), 536 states have internal predecessors, (541), 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 16:23:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 541 transitions. [2023-12-02 16:23:27,350 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 541 transitions. Word has length 272 [2023-12-02 16:23:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:23:27,350 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 541 transitions. [2023-12-02 16:23:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 501 states, 501 states have (on average 1.0199600798403194) internal successors, (511), 500 states have internal predecessors, (511), 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 16:23:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 541 transitions. [2023-12-02 16:23:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-02 16:23:27,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:23:27,358 INFO L195 NwaCegarLoop]: trace histogram [498, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:23:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:23:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:23:27,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:23:27,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:23:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash 27497575, now seen corresponding path program 11 times [2023-12-02 16:23:27,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:23:27,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554854532] [2023-12-02 16:23:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:23:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:23:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:25:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 124288 backedges. 0 proven. 124251 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 16:25:43,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:25:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554854532] [2023-12-02 16:25:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554854532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:25:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064577524] [2023-12-02 16:25:43,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:25:43,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:25:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:25:43,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:25:43,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:25:44,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 16:25:44,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:25:44,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 16:25:44,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:25:44,104 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 16:25:47,731 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 16:25:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:48,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 18 [2023-12-02 16:25:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:48,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 18 [2023-12-02 16:25:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 124288 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 124251 trivial. 0 not checked. [2023-12-02 16:25:49,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:25:52,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:25:52,840 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 2202 treesize of output 2066 [2023-12-02 16:25:54,021 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:25:54,021 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 73 treesize of output 60 [2023-12-02 16:25:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,027 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 94 treesize of output 86 [2023-12-02 16:25:54,050 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:25:54,050 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 79 treesize of output 57 [2023-12-02 16:25:54,057 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 94 treesize of output 90 [2023-12-02 16:25:54,170 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:25:54,170 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 73 treesize of output 1 [2023-12-02 16:25:54,178 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:25:54,178 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 113 treesize of output 1 [2023-12-02 16:25:54,189 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:25:54,189 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 147 treesize of output 113 [2023-12-02 16:25:54,198 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 542 treesize of output 518 [2023-12-02 16:25:54,238 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:25:54,239 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 73 treesize of output 60 [2023-12-02 16:25:54,242 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,247 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 77 treesize of output 69 [2023-12-02 16:25:54,267 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:25:54,267 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 38 treesize of output 32 [2023-12-02 16:25:54,273 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 95 treesize of output 79 [2023-12-02 16:25:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,284 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 65 treesize of output 53 [2023-12-02 16:25:54,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,310 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 16:25:54,310 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 449 treesize of output 337 [2023-12-02 16:25:54,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,366 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 16:25:54,367 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 154 treesize of output 1 [2023-12-02 16:25:54,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:25:54,382 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 168 treesize of output 162 [2023-12-02 16:25:54,494 INFO L349 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-12-02 16:25:54,495 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 730 treesize of output 551 [2023-12-02 16:25:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:54,705 INFO L349 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2023-12-02 16:25:54,706 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 111 treesize of output 85 [2023-12-02 16:25:54,757 INFO L349 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-12-02 16:25:54,758 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 764 treesize of output 585 [2023-12-02 16:25:55,055 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:25:55,065 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 44 treesize of output 48 [2023-12-02 16:25:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,105 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,115 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 1 [2023-12-02 16:25:55,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,128 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 1 [2023-12-02 16:25:55,135 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,139 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,142 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 1 [2023-12-02 16:25:55,146 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,147 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,155 INFO L349 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-12-02 16:25:55,155 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 1 [2023-12-02 16:25:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 16:25:55,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,176 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 16:25:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,187 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 1 [2023-12-02 16:25:55,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,205 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 1 [2023-12-02 16:25:55,224 INFO L349 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-12-02 16:25:55,224 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 931 treesize of output 1 [2023-12-02 16:25:55,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,245 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 650 treesize of output 1 [2023-12-02 16:25:55,257 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,263 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 650 treesize of output 1 [2023-12-02 16:25:55,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,278 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 16:25:55,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 1 [2023-12-02 16:25:55,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:25:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:25:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:26:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 124288 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 124251 trivial. 0 not checked. [2023-12-02 16:26:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064577524] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:26:08,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108279641] [2023-12-02 16:26:08,125 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:26:08,125 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:26:08,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:26:08,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:26:08,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:26:08,287 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:26:11,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17308#(and (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (or (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 16:26:11,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:26:11,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:26:11,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [500, 12, 12] total 522 [2023-12-02 16:26:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107444377] [2023-12-02 16:26:11,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:26:11,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2023-12-02 16:26:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2023-12-02 16:26:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125354, Invalid=155013, Unknown=3, NotChecked=0, Total=280370 [2023-12-02 16:26:11,338 INFO L87 Difference]: Start difference. First operand 537 states and 541 transitions. Second operand has 523 states, 523 states have (on average 1.0650095602294456) internal successors, (557), 522 states have internal predecessors, (557), 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 16:28:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:28:22,988 INFO L93 Difference]: Finished difference Result 597 states and 606 transitions. [2023-12-02 16:28:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 524 states. [2023-12-02 16:28:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 1.0650095602294456) internal successors, (557), 522 states have internal predecessors, (557), 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 522 [2023-12-02 16:28:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:28:22,991 INFO L225 Difference]: With dead ends: 597 [2023-12-02 16:28:22,991 INFO L226 Difference]: Without dead ends: 560 [2023-12-02 16:28:23,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2581 GetRequests, 1536 SyntacticMatches, 0 SemanticMatches, 1045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153693 ImplicationChecksByTransitivity, 212.7s TimeCoverageRelationStatistics Valid=376580, Invalid=718579, Unknown=3, NotChecked=0, Total=1095162 [2023-12-02 16:28:23,040 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:28:23,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 131 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 16:28:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-12-02 16:28:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 535. [2023-12-02 16:28:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.0074906367041199) internal successors, (538), 534 states have internal predecessors, (538), 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 16:28:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 538 transitions. [2023-12-02 16:28:23,119 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 538 transitions. Word has length 522 [2023-12-02 16:28:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:28:23,119 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 538 transitions. [2023-12-02 16:28:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 1.0650095602294456) internal successors, (557), 522 states have internal predecessors, (557), 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 16:28:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 538 transitions. [2023-12-02 16:28:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-02 16:28:23,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:28:23,123 INFO L195 NwaCegarLoop]: trace histogram [499, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-02 16:28:23,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 16:28:23,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:28:23,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:28:23,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:28:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1439377981, now seen corresponding path program 12 times [2023-12-02 16:28:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:28:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938374231] [2023-12-02 16:28:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:28:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:28:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:30:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 124785 backedges. 0 proven. 124750 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:30:46,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:30:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938374231] [2023-12-02 16:30:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938374231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:30:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755655997] [2023-12-02 16:30:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:30:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:30:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:30:46,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:30:46,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c43a1-aadb-4c2b-93a9-2eca6dfdd5a5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 16:30:47,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:30:47,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:30:47,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 4624 conjuncts, 501 conjunts are in the unsatisfiable core [2023-12-02 16:30:47,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:30:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 124785 backedges. 0 proven. 124750 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:30:48,121 INFO L327 TraceCheckSpWp]: Computing backward predicates...