./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/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_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:17:01,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:17:01,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 08:17:01,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:17:01,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:17:01,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:17:01,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:17:01,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:17:01,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:17:01,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:17:01,242 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:17:01,243 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:17:01,243 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:17:01,244 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:17:01,244 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:17:01,245 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:17:01,245 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:17:01,246 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:17:01,246 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:17:01,247 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:17:01,247 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:17:01,248 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:17:01,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 08:17:01,249 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 08:17:01,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:17:01,250 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:17:01,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:17:01,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:17:01,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:17:01,252 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 08:17:01,252 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 08:17:01,253 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 08:17:01,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:17:01,254 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 08:17:01,254 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 08:17:01,254 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:17:01,254 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:17:01,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:17:01,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:17:01,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:17:01,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:17:01,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:17:01,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:17:01,257 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_f1df98c8-6e92-4825-a332-40471883b4ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2023-12-02 08:17:01,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:17:01,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:17:01,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:17:01,500 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:17:01,500 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:17:01,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/verifythis/duplets.c [2023-12-02 08:17:04,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:17:04,431 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:17:04,432 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/sv-benchmarks/c/verifythis/duplets.c [2023-12-02 08:17:04,440 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/data/c4979d25d/927c2f74caf4491d8d6dcf4497aef590/FLAG94530ba20 [2023-12-02 08:17:04,455 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/data/c4979d25d/927c2f74caf4491d8d6dcf4497aef590 [2023-12-02 08:17:04,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:17:04,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:17:04,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:17:04,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:17:04,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:17:04,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5eface and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04, skipping insertion in model container [2023-12-02 08:17:04,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:17:04,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:17:04,672 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:17:04,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:17:04,711 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:17:04,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04 WrapperNode [2023-12-02 08:17:04,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:17:04,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:17:04,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:17:04,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:17:04,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,753 INFO L138 Inliner]: procedures = 21, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-12-02 08:17:04,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:17:04,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:17:04,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:17:04,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:17:04,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:17:04,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:17:04,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:17:04,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:17:04,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (1/1) ... [2023-12-02 08:17:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:17:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:04,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:17:04,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:17:04,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:17:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 08:17:04,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 08:17:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:17:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 08:17:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 08:17:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 08:17:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:17:04,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:17:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 08:17:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 08:17:04,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 08:17:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 08:17:04,935 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:17:04,937 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:17:05,239 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:17:05,287 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:17:05,287 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 08:17:05,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:17:05 BoogieIcfgContainer [2023-12-02 08:17:05,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:17:05,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:17:05,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:17:05,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:17:05,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:17:04" (1/3) ... [2023-12-02 08:17:05,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2486c0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:17:05, skipping insertion in model container [2023-12-02 08:17:05,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:17:04" (2/3) ... [2023-12-02 08:17:05,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2486c0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:17:05, skipping insertion in model container [2023-12-02 08:17:05,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:17:05" (3/3) ... [2023-12-02 08:17:05,298 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2023-12-02 08:17:05,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:17:05,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-12-02 08:17:05,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:17:05,369 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@71b3ffff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:17:05,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-12-02 08:17:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 08:17:05,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:05,382 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:05,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:05,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1662355982, now seen corresponding path program 1 times [2023-12-02 08:17:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237124538] [2023-12-02 08:17:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:05,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237124538] [2023-12-02 08:17:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237124538] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:05,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:05,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:17:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282855354] [2023-12-02 08:17:05,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:05,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:05,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:05,738 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:05,839 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2023-12-02 08:17:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2023-12-02 08:17:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:05,848 INFO L225 Difference]: With dead ends: 85 [2023-12-02 08:17:05,848 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 08:17:05,850 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 08:17:05,853 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:05,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 127 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 08:17:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-02 08:17:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-12-02 08:17:05,890 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2023-12-02 08:17:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:05,891 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-12-02 08:17:05,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-12-02 08:17:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 08:17:05,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:05,893 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:17:05,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:05,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1662355981, now seen corresponding path program 1 times [2023-12-02 08:17:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:05,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340467754] [2023-12-02 08:17:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:17:06,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340467754] [2023-12-02 08:17:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340467754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391173805] [2023-12-02 08:17:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:06,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:06,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:17:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:06,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 08:17:06,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:06,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 08:17:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:17:06,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:17:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391173805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:07,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039999885] [2023-12-02 08:17:07,164 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 08:17:07,164 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:07,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:07,173 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:07,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:08,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:08,362 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2039999885] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:09,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:09,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2023-12-02 08:17:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451294469] [2023-12-02 08:17:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 08:17:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 08:17:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-12-02 08:17:09,716 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:10,134 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-12-02 08:17:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:17:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2023-12-02 08:17:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:10,136 INFO L225 Difference]: With dead ends: 83 [2023-12-02 08:17:10,136 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 08:17:10,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-12-02 08:17:10,139 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 82 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:10,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 193 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:17:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 08:17:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 08:17:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-12-02 08:17:10,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2023-12-02 08:17:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:10,151 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-12-02 08:17:10,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-12-02 08:17:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 08:17:10,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:10,153 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:10,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:17:10,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:10,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:10,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:10,354 INFO L85 PathProgramCache]: Analyzing trace with hash 6572095, now seen corresponding path program 1 times [2023-12-02 08:17:10,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:10,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909394103] [2023-12-02 08:17:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:10,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:17:10,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909394103] [2023-12-02 08:17:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909394103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944037803] [2023-12-02 08:17:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:10,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:10,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:10,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:17:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:10,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 08:17:10,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:10,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 08:17:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:17:11,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 08:17:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944037803] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903177957] [2023-12-02 08:17:12,679 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 08:17:12,679 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:12,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:12,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:12,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:13,495 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:13,497 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1903177957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 8, 7] total 27 [2023-12-02 08:17:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924644949] [2023-12-02 08:17:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:17:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:17:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-12-02 08:17:14,886 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:15,480 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-12-02 08:17:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:17:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-12-02 08:17:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:15,482 INFO L225 Difference]: With dead ends: 82 [2023-12-02 08:17:15,482 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 08:17:15,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-12-02 08:17:15,484 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 80 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:15,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 225 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:17:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 08:17:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 08:17:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2023-12-02 08:17:15,493 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2023-12-02 08:17:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:15,493 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2023-12-02 08:17:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2023-12-02 08:17:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 08:17:15,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:15,495 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:15,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:17:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:15,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:15,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1774480417, now seen corresponding path program 1 times [2023-12-02 08:17:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202041749] [2023-12-02 08:17:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:15,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202041749] [2023-12-02 08:17:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202041749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:15,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989518876] [2023-12-02 08:17:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:17:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:17:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:17:15,881 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:15,971 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-12-02 08:17:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:17:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-12-02 08:17:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:15,973 INFO L225 Difference]: With dead ends: 80 [2023-12-02 08:17:15,973 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 08:17:15,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:17:15,974 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 14 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:15,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 152 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 08:17:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-02 08:17:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 68 states have internal predecessors, (73), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-12-02 08:17:15,982 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 20 [2023-12-02 08:17:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:15,982 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-12-02 08:17:15,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-12-02 08:17:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 08:17:15,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:15,984 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:15,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:17:15,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:15,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:15,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1774480416, now seen corresponding path program 1 times [2023-12-02 08:17:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:15,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014118882] [2023-12-02 08:17:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:15,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:16,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014118882] [2023-12-02 08:17:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014118882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:17:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564624180] [2023-12-02 08:17:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:17:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:17:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:17:16,258 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:16,450 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-12-02 08:17:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:17:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-12-02 08:17:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:16,452 INFO L225 Difference]: With dead ends: 91 [2023-12-02 08:17:16,452 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 08:17:16,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:17:16,453 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:16,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 112 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:17:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 08:17:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2023-12-02 08:17:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 71 states have internal predecessors, (80), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2023-12-02 08:17:16,462 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 20 [2023-12-02 08:17:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:16,463 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2023-12-02 08:17:16,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2023-12-02 08:17:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 08:17:16,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:16,464 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:16,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 08:17:16,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:16,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash 825681930, now seen corresponding path program 1 times [2023-12-02 08:17:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84616491] [2023-12-02 08:17:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:16,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84616491] [2023-12-02 08:17:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84616491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70789705] [2023-12-02 08:17:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:16,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:16,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:17:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:16,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 08:17:16,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:16,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 08:17:16,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 08:17:17,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:17,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2023-12-02 08:17:17,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:17,399 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 08:17:17,399 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 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 08:17:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:17:17,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:17:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70789705] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:17:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-12-02 08:17:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421481105] [2023-12-02 08:17:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:17:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:17:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:17:17,475 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 9 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:17,866 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2023-12-02 08:17:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:17:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-12-02 08:17:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:17,869 INFO L225 Difference]: With dead ends: 106 [2023-12-02 08:17:17,869 INFO L226 Difference]: Without dead ends: 106 [2023-12-02 08:17:17,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:17:17,870 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 127 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:17,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 177 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:17:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-02 08:17:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2023-12-02 08:17:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 75 states have internal predecessors, (85), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2023-12-02 08:17:17,880 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 21 [2023-12-02 08:17:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:17,880 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2023-12-02 08:17:17,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:17:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2023-12-02 08:17:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 08:17:17,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:17,882 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:17,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:17:18,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:18,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:18,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -885966156, now seen corresponding path program 1 times [2023-12-02 08:17:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708732397] [2023-12-02 08:17:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:18,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708732397] [2023-12-02 08:17:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708732397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216897791] [2023-12-02 08:17:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:18,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:18,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:18,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:17:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:18,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 08:17:18,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:18,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216897791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216530083] [2023-12-02 08:17:18,457 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 08:17:18,457 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:18,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:18,457 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:18,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:19,235 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:19,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:20,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [216530083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:20,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:20,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 22 [2023-12-02 08:17:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390488671] [2023-12-02 08:17:20,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 08:17:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 08:17:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-02 08:17:20,835 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:21,957 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2023-12-02 08:17:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 08:17:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2023-12-02 08:17:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:21,958 INFO L225 Difference]: With dead ends: 90 [2023-12-02 08:17:21,958 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 08:17:21,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-02 08:17:21,959 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:21,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 227 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 568 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 08:17:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 08:17:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2023-12-02 08:17:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 76 states have internal predecessors, (85), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2023-12-02 08:17:21,964 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 23 [2023-12-02 08:17:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:21,965 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2023-12-02 08:17:21,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:17:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2023-12-02 08:17:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 08:17:21,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:21,966 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:21,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 08:17:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:22,166 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:22,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -169323258, now seen corresponding path program 1 times [2023-12-02 08:17:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:22,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779894747] [2023-12-02 08:17:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:22,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:22,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779894747] [2023-12-02 08:17:22,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779894747] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135642919] [2023-12-02 08:17:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:22,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:22,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:22,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:17:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:22,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:17:22,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:22,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:17:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135642919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:17:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-12-02 08:17:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850618397] [2023-12-02 08:17:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:17:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:17:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:17:22,317 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:22,373 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2023-12-02 08:17:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:17:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2023-12-02 08:17:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:22,374 INFO L225 Difference]: With dead ends: 107 [2023-12-02 08:17:22,375 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 08:17:22,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:17:22,376 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:22,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 211 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:17:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 08:17:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2023-12-02 08:17:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.76) internal successors, (88), 78 states have internal predecessors, (88), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-12-02 08:17:22,382 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 22 [2023-12-02 08:17:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:22,383 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-12-02 08:17:22,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-12-02 08:17:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 08:17:22,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:22,384 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:22,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 08:17:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 08:17:22,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:22,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash 612655591, now seen corresponding path program 1 times [2023-12-02 08:17:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601160693] [2023-12-02 08:17:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:22,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601160693] [2023-12-02 08:17:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601160693] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:22,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:22,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:17:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48505877] [2023-12-02 08:17:22,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:22,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:22,650 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:22,695 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2023-12-02 08:17:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-12-02 08:17:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:22,696 INFO L225 Difference]: With dead ends: 90 [2023-12-02 08:17:22,696 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 08:17:22,696 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 08:17:22,697 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:22,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:17:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 08:17:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-02 08:17:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.74) internal successors, (87), 77 states have internal predecessors, (87), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2023-12-02 08:17:22,703 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 24 [2023-12-02 08:17:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:22,703 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2023-12-02 08:17:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2023-12-02 08:17:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 08:17:22,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:22,705 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 08:17:22,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:22,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 612655592, now seen corresponding path program 1 times [2023-12-02 08:17:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587318550] [2023-12-02 08:17:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:22,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:22,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587318550] [2023-12-02 08:17:22,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587318550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:22,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:22,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:17:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602112968] [2023-12-02 08:17:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:22,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:22,784 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:22,830 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2023-12-02 08:17:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-12-02 08:17:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:22,832 INFO L225 Difference]: With dead ends: 89 [2023-12-02 08:17:22,832 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 08:17:22,832 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 08:17:22,833 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:22,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:17:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 08:17:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-02 08:17:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.72) internal successors, (86), 76 states have internal predecessors, (86), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-12-02 08:17:22,837 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 24 [2023-12-02 08:17:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:22,838 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-12-02 08:17:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-12-02 08:17:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 08:17:22,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:22,839 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:22,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 08:17:22,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:22,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1814945842, now seen corresponding path program 1 times [2023-12-02 08:17:22,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:22,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064053140] [2023-12-02 08:17:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:23,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064053140] [2023-12-02 08:17:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064053140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:23,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 08:17:23,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203938829] [2023-12-02 08:17:23,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:23,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:17:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:17:23,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:17:23,178 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:17:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:23,488 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2023-12-02 08:17:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:17:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-12-02 08:17:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:23,490 INFO L225 Difference]: With dead ends: 92 [2023-12-02 08:17:23,490 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 08:17:23,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:17:23,491 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:23,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:17:23,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 08:17:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2023-12-02 08:17:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.7) internal successors, (85), 76 states have internal predecessors, (85), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2023-12-02 08:17:23,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 25 [2023-12-02 08:17:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:23,496 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2023-12-02 08:17:23,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:17:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2023-12-02 08:17:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 08:17:23,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:23,497 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 08:17:23,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:23,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1816316994, now seen corresponding path program 1 times [2023-12-02 08:17:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49413491] [2023-12-02 08:17:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:23,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49413491] [2023-12-02 08:17:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49413491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486462224] [2023-12-02 08:17:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:23,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:23,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:17:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:24,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 08:17:24,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:24,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 08:17:24,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 08:17:24,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 08:17:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:24,356 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 19 treesize of output 19 [2023-12-02 08:17:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:24,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-02 08:17:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:24,409 INFO L349 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2023-12-02 08:17:24,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 29 [2023-12-02 08:17:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:24,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:17:24,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 42 [2023-12-02 08:17:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:17:24,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:25,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:17:25,249 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 409 treesize of output 369 [2023-12-02 08:17:26,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486462224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:26,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298418009] [2023-12-02 08:17:26,073 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 08:17:26,073 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:26,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:26,073 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:26,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:27,817 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:27,818 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:31,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2753#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_finddup_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) 0)) (= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (<= 2 |ULTIMATE.start_finddup_~n#1|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 2 |ULTIMATE.start_finddup_#in~n#1|) (= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= (select |#length| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) 3)) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 2 |ULTIMATE.start_finddup_~_i#1.base|) (<= 2 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_#in~_i#1.base|) (= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~n#1| 1073741823) (<= 4 (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2023-12-02 08:17:31,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:17:31,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:17:31,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-12-02 08:17:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843397114] [2023-12-02 08:17:31,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:17:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 08:17:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 08:17:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 08:17:31,909 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 08:17:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:33,452 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2023-12-02 08:17:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 08:17:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2023-12-02 08:17:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:33,453 INFO L225 Difference]: With dead ends: 104 [2023-12-02 08:17:33,453 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 08:17:33,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=482, Invalid=3178, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 08:17:33,455 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 235 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:33,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 201 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:17:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 08:17:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2023-12-02 08:17:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 74 states have internal predecessors, (82), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-12-02 08:17:33,459 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 25 [2023-12-02 08:17:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:33,459 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-12-02 08:17:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 08:17:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-12-02 08:17:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 08:17:33,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:33,460 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:33,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:17:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 08:17:33,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:33,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash 475592654, now seen corresponding path program 1 times [2023-12-02 08:17:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:33,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139470762] [2023-12-02 08:17:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:33,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139470762] [2023-12-02 08:17:33,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139470762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002669817] [2023-12-02 08:17:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:33,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:17:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:33,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:17:33,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:33,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:33,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002669817] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:33,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217155504] [2023-12-02 08:17:33,869 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 08:17:33,870 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:33,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:33,870 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:33,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:35,831 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:35,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:38,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3148#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= (select |#length| |ULTIMATE.start_finddup_~a#1.base|) (+ 3 (* |ULTIMATE.start_finddup_~i~1#1| 4))) (= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_i#1.base|) (<= 2 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_#in~_i#1.base|) (= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2023-12-02 08:17:38,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:17:38,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:38,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-02 08:17:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886175198] [2023-12-02 08:17:38,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:17:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:17:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:17:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-12-02 08:17:38,299 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:38,383 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2023-12-02 08:17:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:17:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2023-12-02 08:17:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:38,384 INFO L225 Difference]: With dead ends: 121 [2023-12-02 08:17:38,384 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 08:17:38,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-12-02 08:17:38,385 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 30 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:38,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 274 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 08:17:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2023-12-02 08:17:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.706896551724138) internal successors, (99), 84 states have internal predecessors, (99), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 08:17:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-12-02 08:17:38,389 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 26 [2023-12-02 08:17:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:38,389 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-12-02 08:17:38,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-12-02 08:17:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 08:17:38,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:38,390 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:38,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 08:17:38,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 08:17:38,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:38,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash -87623705, now seen corresponding path program 1 times [2023-12-02 08:17:38,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:38,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737404226] [2023-12-02 08:17:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:38,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737404226] [2023-12-02 08:17:38,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737404226] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:38,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:38,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:17:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876140522] [2023-12-02 08:17:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:38,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:17:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:17:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:17:38,659 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:38,742 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2023-12-02 08:17:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:17:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-02 08:17:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:38,744 INFO L225 Difference]: With dead ends: 149 [2023-12-02 08:17:38,744 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 08:17:38,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:17:38,745 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 92 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:38,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 475 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 08:17:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2023-12-02 08:17:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 89 states have internal predecessors, (103), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:17:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2023-12-02 08:17:38,751 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 29 [2023-12-02 08:17:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:38,751 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2023-12-02 08:17:38,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2023-12-02 08:17:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 08:17:38,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:38,753 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 08:17:38,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:38,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -513726458, now seen corresponding path program 1 times [2023-12-02 08:17:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647367577] [2023-12-02 08:17:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:38,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:38,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647367577] [2023-12-02 08:17:38,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647367577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:38,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391472967] [2023-12-02 08:17:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:38,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:38,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:38,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:17:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:38,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:17:38,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:38,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391472967] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631639405] [2023-12-02 08:17:38,940 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 08:17:38,940 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:38,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:38,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:38,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:41,330 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 174 for LOIs [2023-12-02 08:17:41,661 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:41,662 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:45,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3821#(and (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_#in~_j#1.offset_9| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_14| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_14| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_15| Int) (|v_ULTIMATE.start_finddup_~j~1#1_66| Int) (|v_ULTIMATE.start_finddup_~i~1#1_49| Int) (|v_ULTIMATE.start_finddup_#in~n#1_9| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.base_9| Int) (|v_ULTIMATE.start_finddup_~n#1_18| Int) (|v_ULTIMATE.start_finddup_#in~a#1.offset_9| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_13| Int) (|v_ULTIMATE.start_finddup_#in~_i#1.base_9| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_#in~_i#1.offset_9| Int) (|v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_12| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_77| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_1| Int)) (and (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_13|) (<= 1 |#StackHeapBarrier|) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_12|) (<= |v_ULTIMATE.start_finddup_~n#1_18| 1073741823) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_1| 0) (= |v_ULTIMATE.start_finddup_~a#1.offset_14| 0) (= |v_ULTIMATE.start_finddup_#in~a#1.offset_9| 0) (= |v_ULTIMATE.start_finddup_#in~_i#1.offset_9| 0) (<= 2 |v_ULTIMATE.start_finddup_#in~_i#1.base_9|) (<= 1 |v_ULTIMATE.start_finddup_~i~1#1_49|) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_15|) (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_1|) (= |v_ULTIMATE.start_finddup_#in~_j#1.offset_9| 0) (<= |v_ULTIMATE.start_finddup_~n#1_18| |v_ULTIMATE.start_finddup_~i~1#1_49|) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_1|) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_58| 0) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_77| 1073741823) (<= 1 |v_ULTIMATE.start_finddup_~j~1#1_66|) (= |v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_52| 0) (<= |v_ULTIMATE.start_finddup_~n#1_18| |v_ULTIMATE.start_finddup_~j~1#1_66|) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_1| 0) (= |v_ULTIMATE.start_finddup_~_j#1.offset_14| 0) (<= 2 |v_ULTIMATE.start_finddup_#in~_j#1.base_9|) (<= |v_ULTIMATE.start_finddup_#in~n#1_9| 1073741823))))' at error location [2023-12-02 08:17:45,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:17:45,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:45,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-02 08:17:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808911481] [2023-12-02 08:17:45,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:17:45,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:17:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:17:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2023-12-02 08:17:45,528 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:45,573 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-12-02 08:17:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:17:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-02 08:17:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:45,575 INFO L225 Difference]: With dead ends: 103 [2023-12-02 08:17:45,575 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 08:17:45,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=93, Invalid=556, Unknown=1, NotChecked=0, Total=650 [2023-12-02 08:17:45,576 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 24 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:45,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 197 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:17:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 08:17:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-02 08:17:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 89 states have internal predecessors, (101), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:17:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-12-02 08:17:45,581 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 29 [2023-12-02 08:17:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:45,581 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-12-02 08:17:45,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:17:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-12-02 08:17:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 08:17:45,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:45,583 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:45,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 08:17:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 08:17:45,788 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:45,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1693155884, now seen corresponding path program 1 times [2023-12-02 08:17:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089768827] [2023-12-02 08:17:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:45,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089768827] [2023-12-02 08:17:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089768827] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:45,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:45,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848832989] [2023-12-02 08:17:45,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:45,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:17:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:17:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:17:45,846 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:17:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:45,923 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-12-02 08:17:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:17:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-12-02 08:17:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:45,925 INFO L225 Difference]: With dead ends: 98 [2023-12-02 08:17:45,925 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 08:17:45,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:17:45,926 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:45,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 99 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 08:17:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-12-02 08:17:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 84 states have internal predecessors, (96), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:17:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2023-12-02 08:17:45,931 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 31 [2023-12-02 08:17:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:45,932 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2023-12-02 08:17:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:17:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2023-12-02 08:17:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 08:17:45,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:45,933 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 08:17:45,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1693155885, now seen corresponding path program 1 times [2023-12-02 08:17:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258007260] [2023-12-02 08:17:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:46,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258007260] [2023-12-02 08:17:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258007260] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:46,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:46,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504793956] [2023-12-02 08:17:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:46,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:17:46,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:17:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:17:46,053 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:17:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:46,141 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2023-12-02 08:17:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:17:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-12-02 08:17:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:46,143 INFO L225 Difference]: With dead ends: 93 [2023-12-02 08:17:46,143 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 08:17:46,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:17:46,144 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:46,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 94 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:17:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 08:17:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2023-12-02 08:17:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:17:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2023-12-02 08:17:46,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 31 [2023-12-02 08:17:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:46,149 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2023-12-02 08:17:46,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:17:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2023-12-02 08:17:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 08:17:46,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:46,150 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 08:17:46,151 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:46,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2136279402, now seen corresponding path program 2 times [2023-12-02 08:17:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451496002] [2023-12-02 08:17:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:46,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:17:46,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451496002] [2023-12-02 08:17:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451496002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46772081] [2023-12-02 08:17:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:17:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:46,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:46,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:17:46,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 08:17:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:17:46,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 08:17:46,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 08:17:46,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:46,697 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 08:17:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 08:17:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46772081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569058319] [2023-12-02 08:17:46,748 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 08:17:46,748 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:46,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:46,748 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:46,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:48,563 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:48,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:51,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4639#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= (select |#length| |ULTIMATE.start_finddup_~a#1.base|) (+ 3 (* |ULTIMATE.start_finddup_~i~1#1| 4))) (= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_i#1.base|) (<= 2 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_#in~_i#1.base|) (= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2023-12-02 08:17:51,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:17:51,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:51,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-12-02 08:17:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80898871] [2023-12-02 08:17:51,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:17:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 08:17:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 08:17:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:17:51,203 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:17:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:51,770 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2023-12-02 08:17:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 08:17:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 30 [2023-12-02 08:17:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:51,771 INFO L225 Difference]: With dead ends: 114 [2023-12-02 08:17:51,772 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 08:17:51,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=484, Invalid=2272, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 08:17:51,774 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:51,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 453 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:17:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 08:17:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2023-12-02 08:17:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 68 states have internal predecessors, (74), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:17:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2023-12-02 08:17:51,778 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 30 [2023-12-02 08:17:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:51,779 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2023-12-02 08:17:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:17:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2023-12-02 08:17:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 08:17:51,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:51,780 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:51,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 08:17:51,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 08:17:51,981 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:17:51,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash -574881632, now seen corresponding path program 2 times [2023-12-02 08:17:51,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:51,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707337970] [2023-12-02 08:17:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:51,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 08:17:53,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707337970] [2023-12-02 08:17:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707337970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244691238] [2023-12-02 08:17:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:17:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:53,213 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:53,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:17:53,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 08:17:53,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:17:53,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 08:17:53,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:53,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 08:17:53,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-02 08:17:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:53,647 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 23 treesize of output 23 [2023-12-02 08:17:53,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:17:53,657 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 35 treesize of output 35 [2023-12-02 08:17:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:17:54,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:17:54,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2023-12-02 08:17:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:17:54,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:54,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:17:54,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 385 treesize of output 345 [2023-12-02 08:17:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 08:17:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244691238] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728290763] [2023-12-02 08:17:56,175 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 08:17:56,176 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:56,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:56,176 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:56,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:58,249 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 174 for LOIs [2023-12-02 08:17:58,570 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:17:58,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:18:14,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5097#(and (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_#in~_i#1.base_13| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_89| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.offset_13| Int) (|v_ULTIMATE.start_finddup_~n#1_22| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_108| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_finddup_~j~1#1_102| Int) (|v_ULTIMATE.start_finddup_#in~_i#1.offset_13| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_finddup_~i~1#1_77| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.base_13| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_19| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_17| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_18| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_finddup_#in~a#1.offset_13| Int) (|v_ULTIMATE.start_finddup_#in~n#1_13| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_18| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_16| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_2|) (<= 1 |v_ULTIMATE.start_finddup_~n#1_22|) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_finddup_~n#1_22| |v_ULTIMATE.start_finddup_~i~1#1_77|) (= |v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_71| 0) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_16|) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_108| 1073741823) (<= |v_ULTIMATE.start_finddup_~n#1_22| |v_ULTIMATE.start_finddup_~j~1#1_102|) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_19|) (= 0 |v_ULTIMATE.start_finddup_#in~_j#1.offset_13|) (= |v_ULTIMATE.start_finddup_#in~a#1.offset_13| 0) (<= 2 |v_ULTIMATE.start_finddup_#in~_j#1.base_13|) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_2| 0) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_2|) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_17|) (= |v_ULTIMATE.start_finddup_#in~_i#1.offset_13| 0) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_89| 0) (<= |v_ULTIMATE.start_finddup_~n#1_22| 1073741823) (<= |v_ULTIMATE.start_finddup_#in~n#1_13| 1073741823) (= |v_ULTIMATE.start_finddup_~a#1.offset_18| 0) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_2| 0) (= |v_ULTIMATE.start_finddup_~_j#1.offset_18| 0) (<= 2 |v_ULTIMATE.start_finddup_#in~_i#1.base_13|))))' at error location [2023-12-02 08:18:14,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:18:14,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:18:14,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2023-12-02 08:18:14,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242636073] [2023-12-02 08:18:14,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:18:14,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 08:18:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 08:18:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2710, Unknown=6, NotChecked=0, Total=2970 [2023-12-02 08:18:14,059 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 08:18:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:20,276 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2023-12-02 08:18:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 08:18:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 31 [2023-12-02 08:18:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:20,278 INFO L225 Difference]: With dead ends: 125 [2023-12-02 08:18:20,278 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 08:18:20,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=463, Invalid=4360, Unknown=7, NotChecked=0, Total=4830 [2023-12-02 08:18:20,280 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 216 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:20,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 630 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:18:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 08:18:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-12-02 08:18:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.380952380952381) internal successors, (87), 78 states have internal predecessors, (87), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:18:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2023-12-02 08:18:20,283 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 31 [2023-12-02 08:18:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:20,284 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2023-12-02 08:18:20,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 08:18:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2023-12-02 08:18:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 08:18:20,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:20,284 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:20,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 08:18:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:20,485 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:18:20,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -939889560, now seen corresponding path program 1 times [2023-12-02 08:18:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274386025] [2023-12-02 08:18:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:18:20,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274386025] [2023-12-02 08:18:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274386025] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:20,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:20,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 08:18:20,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958343217] [2023-12-02 08:18:20,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:20,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 08:18:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 08:18:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 08:18:20,740 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:18:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:20,926 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2023-12-02 08:18:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:18:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-12-02 08:18:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:20,928 INFO L225 Difference]: With dead ends: 132 [2023-12-02 08:18:20,928 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 08:18:20,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:18:20,928 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 107 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:20,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 320 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 08:18:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2023-12-02 08:18:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 83 states have internal predecessors, (92), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 08:18:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2023-12-02 08:18:20,933 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 36 [2023-12-02 08:18:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2023-12-02 08:18:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:18:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2023-12-02 08:18:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 08:18:20,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:20,935 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 08:18:20,935 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:18:20,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 765384125, now seen corresponding path program 1 times [2023-12-02 08:18:20,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:20,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551842137] [2023-12-02 08:18:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:18:21,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:21,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551842137] [2023-12-02 08:18:21,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551842137] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:21,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485380534] [2023-12-02 08:18:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:21,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:21,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:21,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:21,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:18:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:21,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 08:18:21,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:21,477 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 08:18:21,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 08:18:21,639 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 18 treesize of output 13 [2023-12-02 08:18:21,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-12-02 08:18:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:18:21,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:18:21,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:18:21,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 08:18:21,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:18:21,962 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 29 treesize of output 32 [2023-12-02 08:18:21,988 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 7 treesize of output 5 [2023-12-02 08:18:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:18:22,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485380534] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:18:22,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833571137] [2023-12-02 08:18:22,147 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 08:18:22,147 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:18:22,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:18:22,148 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:18:22,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:18:23,396 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 221 for LOIs [2023-12-02 08:18:23,746 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:18:23,747 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:18:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1833571137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:36,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:18:36,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [14, 14, 13] total 53 [2023-12-02 08:18:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167381225] [2023-12-02 08:18:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:18:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:18:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2415, Unknown=9, NotChecked=0, Total=2756 [2023-12-02 08:18:36,677 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 08:18:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:42,674 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2023-12-02 08:18:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:18:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2023-12-02 08:18:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:42,676 INFO L225 Difference]: With dead ends: 136 [2023-12-02 08:18:42,676 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 08:18:42,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=332, Invalid=2415, Unknown=9, NotChecked=0, Total=2756 [2023-12-02 08:18:42,677 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 93 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 16 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:42,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 238 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1023 Invalid, 8 Unknown, 0 Unchecked, 6.0s Time] [2023-12-02 08:18:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 08:18:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-12-02 08:18:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 108 states have internal predecessors, (119), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 08:18:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-12-02 08:18:42,683 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 37 [2023-12-02 08:18:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:42,683 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-12-02 08:18:42,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 08:18:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-12-02 08:18:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 08:18:42,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:42,684 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:42,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:18:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 08:18:42,885 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:18:42,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash -510965259, now seen corresponding path program 1 times [2023-12-02 08:18:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:42,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92065887] [2023-12-02 08:18:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:18:43,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92065887] [2023-12-02 08:18:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92065887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452693155] [2023-12-02 08:18:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:43,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:43,367 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:43,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 08:18:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:43,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 08:18:43,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:43,494 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 08:18:43,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 08:18:43,664 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 18 treesize of output 13 [2023-12-02 08:18:43,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-12-02 08:18:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:18:43,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:18:43,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:18:43,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 08:18:43,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:18:43,956 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 29 treesize of output 32 [2023-12-02 08:18:43,959 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 7 treesize of output 5 [2023-12-02 08:18:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:18:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452693155] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:18:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924762534] [2023-12-02 08:18:44,090 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 08:18:44,090 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:18:44,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:18:44,090 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:18:44,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:18:45,546 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 79 for LOIs [2023-12-02 08:18:45,609 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:18:45,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:18:52,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6415#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_13| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_13|)) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_13|) 0)) (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_13|) (= (select |#valid| |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_13|) 1))) (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_~_i#1.base_23| Int) (|v_#memory_int_103| (Array Int (Array Int Int))) (|v_ULTIMATE.start_finddup_~_j#1.base_25| Int) (|v_ULTIMATE.start_finddup_~a#1.base_26| Int)) (and (= (select |#valid| |v_ULTIMATE.start_finddup_~_i#1.base_23|) 1) (= |#memory_int| (store (store |v_#memory_int_103| |v_ULTIMATE.start_finddup_~_i#1.base_23| (store (select |v_#memory_int_103| |v_ULTIMATE.start_finddup_~_i#1.base_23|) 0 0)) |v_ULTIMATE.start_finddup_~_j#1.base_25| (store (select (store |v_#memory_int_103| |v_ULTIMATE.start_finddup_~_i#1.base_23| (store (select |v_#memory_int_103| |v_ULTIMATE.start_finddup_~_i#1.base_23|) 0 0)) |v_ULTIMATE.start_finddup_~_j#1.base_25|) 0 (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_25|) 0)))) (<= 1 (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_25|) 0)) (= (select (select |v_#memory_int_103| |v_ULTIMATE.start_finddup_~a#1.base_26|) (* (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_25|) 0) 4)) (select (select |v_#memory_int_103| |v_ULTIMATE.start_finddup_~a#1.base_26|) 0)) (= (select |#valid| |v_ULTIMATE.start_finddup_~a#1.base_26|) 1) (= (select |#valid| |v_ULTIMATE.start_finddup_~_j#1.base_25|) 1) (<= 4 (select |#length| |v_ULTIMATE.start_finddup_~_j#1.base_25|)) (<= 4 (select |#length| |v_ULTIMATE.start_finddup_~_i#1.base_23|)) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_23|) (<= (+ (* (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_25|) 0) 4) 4) (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_26|)) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_25|))))' at error location [2023-12-02 08:18:52,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:18:52,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:18:52,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 30 [2023-12-02 08:18:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267358949] [2023-12-02 08:18:52,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:18:52,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 08:18:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 08:18:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2841, Unknown=12, NotChecked=0, Total=3080 [2023-12-02 08:18:52,165 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 30 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 28 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 08:18:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:53,141 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2023-12-02 08:18:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 08:18:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 28 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-12-02 08:18:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:53,144 INFO L225 Difference]: With dead ends: 204 [2023-12-02 08:18:53,144 INFO L226 Difference]: Without dead ends: 204 [2023-12-02 08:18:53,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=510, Invalid=5178, Unknown=12, NotChecked=0, Total=5700 [2023-12-02 08:18:53,147 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 412 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:53,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 827 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:18:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-02 08:18:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 134. [2023-12-02 08:18:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 112 states have internal predecessors, (122), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 08:18:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2023-12-02 08:18:53,154 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 41 [2023-12-02 08:18:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:53,155 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2023-12-02 08:18:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 28 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 08:18:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2023-12-02 08:18:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 08:18:53,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:53,156 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:53,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 08:18:53,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 08:18:53,357 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:18:53,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -511250390, now seen corresponding path program 3 times [2023-12-02 08:18:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825726098] [2023-12-02 08:18:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 08:18:56,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825726098] [2023-12-02 08:18:56,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825726098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556331114] [2023-12-02 08:18:56,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:18:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:56,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:56,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 08:18:56,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:18:56,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:18:56,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-02 08:18:56,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:56,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 08:18:56,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 22 treesize of output 17 [2023-12-02 08:18:56,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 45 treesize of output 36 [2023-12-02 08:18:58,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 83 treesize of output 65 [2023-12-02 08:18:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:18:59,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:02,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556331114] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616526623] [2023-12-02 08:19:02,642 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 08:19:02,642 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:02,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:02,643 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:02,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:04,836 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 174 for LOIs [2023-12-02 08:19:05,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:19:05,162 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:11,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7072#(and (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_#in~_i#1.base_22| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_157| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_27| Int) (|v_ULTIMATE.start_finddup_~n#1_31| Int) (|v_ULTIMATE.start_finddup_#in~_i#1.offset_22| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_28| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_finddup_~j~1#1_141| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_128| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_26| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.offset_22| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.base_22| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_finddup_~i~1#1_101| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_finddup_#in~a#1.offset_22| Int) (|v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_107| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_25| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_27| Int) (|v_ULTIMATE.start_finddup_#in~n#1_22| Int)) (and (<= |v_ULTIMATE.start_finddup_~n#1_31| |v_ULTIMATE.start_finddup_~i~1#1_101|) (= |v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_107| 0) (= |v_ULTIMATE.start_finddup_#in~a#1.offset_22| 0) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_finddup_#in~n#1_22| 1073741823) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_15| 0) (= |v_ULTIMATE.start_finddup_~_j#1.offset_27| 0) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_25|) (= 0 |v_ULTIMATE.start_finddup_#in~_j#1.offset_22|) (<= 2 |v_ULTIMATE.start_finddup_#in~_j#1.base_22|) (= |v_ULTIMATE.start_finddup_~a#1.offset_27| 0) (<= 1 |v_ULTIMATE.start_finddup_~i~1#1_101|) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_11|) (<= 1 |v_ULTIMATE.start_finddup_~j~1#1_141|) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_26|) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_11| 0) (= |v_ULTIMATE.start_finddup_#in~_i#1.offset_22| 0) (<= 2 |v_ULTIMATE.start_finddup_#in~_i#1.base_22|) (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_15|) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_128| 0) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_157| 1073741823) (<= |v_ULTIMATE.start_finddup_~n#1_31| |v_ULTIMATE.start_finddup_~j~1#1_141|) (<= |v_ULTIMATE.start_finddup_~n#1_31| 1073741823) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_28|))))' at error location [2023-12-02 08:19:11,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:19:11,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:19:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2023-12-02 08:19:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487176565] [2023-12-02 08:19:11,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:19:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 08:19:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 08:19:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4183, Unknown=2, NotChecked=0, Total=4556 [2023-12-02 08:19:11,600 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 08:19:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:16,921 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2023-12-02 08:19:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 08:19:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2023-12-02 08:19:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:16,922 INFO L225 Difference]: With dead ends: 153 [2023-12-02 08:19:16,923 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 08:19:16,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=793, Invalid=7577, Unknown=2, NotChecked=0, Total=8372 [2023-12-02 08:19:16,925 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:16,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 846 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 08:19:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 08:19:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2023-12-02 08:19:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 102 states have (on average 1.2745098039215685) internal successors, (130), 119 states have internal predecessors, (130), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 08:19:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2023-12-02 08:19:16,932 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 41 [2023-12-02 08:19:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:16,932 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2023-12-02 08:19:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 08:19:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2023-12-02 08:19:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:19:16,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:16,933 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:16,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 08:19:17,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 08:19:17,134 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:17,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash 416448426, now seen corresponding path program 1 times [2023-12-02 08:19:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:17,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121601974] [2023-12-02 08:19:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:19:17,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121601974] [2023-12-02 08:19:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121601974] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:17,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:17,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 08:19:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739128421] [2023-12-02 08:19:17,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:17,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:19:17,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:19:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:19:17,313 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:17,504 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2023-12-02 08:19:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:19:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2023-12-02 08:19:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:17,506 INFO L225 Difference]: With dead ends: 177 [2023-12-02 08:19:17,506 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 08:19:17,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:19:17,507 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:17,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 234 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:19:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 08:19:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2023-12-02 08:19:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.2685185185185186) internal successors, (137), 124 states have internal predecessors, (137), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 08:19:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2023-12-02 08:19:17,514 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 45 [2023-12-02 08:19:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:17,515 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2023-12-02 08:19:17,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2023-12-02 08:19:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 08:19:17,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:17,516 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 08:19:17,517 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:17,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -796026867, now seen corresponding path program 1 times [2023-12-02 08:19:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367731124] [2023-12-02 08:19:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 08:19:17,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367731124] [2023-12-02 08:19:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367731124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:17,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:17,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697085972] [2023-12-02 08:19:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:17,579 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:17,657 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2023-12-02 08:19:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:19:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-12-02 08:19:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:17,659 INFO L225 Difference]: With dead ends: 144 [2023-12-02 08:19:17,659 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 08:19:17,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:19:17,660 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:17,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 08:19:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-12-02 08:19:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 120 states have internal predecessors, (132), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 08:19:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2023-12-02 08:19:17,667 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 44 [2023-12-02 08:19:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:17,667 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2023-12-02 08:19:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2023-12-02 08:19:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 08:19:17,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:17,669 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 08:19:17,669 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:17,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -796026866, now seen corresponding path program 1 times [2023-12-02 08:19:17,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:17,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101639441] [2023-12-02 08:19:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 08:19:17,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:17,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101639441] [2023-12-02 08:19:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101639441] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:17,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611125498] [2023-12-02 08:19:17,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:17,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:17,756 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:17,817 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2023-12-02 08:19:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:19:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-12-02 08:19:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:17,819 INFO L225 Difference]: With dead ends: 140 [2023-12-02 08:19:17,819 INFO L226 Difference]: Without dead ends: 140 [2023-12-02 08:19:17,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:17,820 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:17,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-02 08:19:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-12-02 08:19:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 116 states have internal predecessors, (127), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 08:19:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2023-12-02 08:19:17,827 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 44 [2023-12-02 08:19:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:17,827 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2023-12-02 08:19:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2023-12-02 08:19:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 08:19:17,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:17,828 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 08:19:17,828 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:17,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -136828166, now seen corresponding path program 1 times [2023-12-02 08:19:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479788722] [2023-12-02 08:19:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:19:17,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479788722] [2023-12-02 08:19:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479788722] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:17,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:17,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 08:19:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995874410] [2023-12-02 08:19:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:19:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:19:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:19:17,995 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:18,175 INFO L93 Difference]: Finished difference Result 172 states and 199 transitions. [2023-12-02 08:19:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:19:18,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2023-12-02 08:19:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:18,177 INFO L225 Difference]: With dead ends: 172 [2023-12-02 08:19:18,177 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 08:19:18,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:19:18,178 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:18,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 283 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 08:19:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 151. [2023-12-02 08:19:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 125 states have internal predecessors, (136), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 08:19:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2023-12-02 08:19:18,185 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 46 [2023-12-02 08:19:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2023-12-02 08:19:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 08:19:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2023-12-02 08:19:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 08:19:18,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:18,186 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 08:19:18,187 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1412014878, now seen corresponding path program 1 times [2023-12-02 08:19:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861579377] [2023-12-02 08:19:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:18,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861579377] [2023-12-02 08:19:18,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861579377] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938122123] [2023-12-02 08:19:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:18,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:18,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:18,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 08:19:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:18,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 08:19:18,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:18,565 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 08:19:18,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 08:19:18,752 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 16 treesize of output 11 [2023-12-02 08:19:18,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-12-02 08:19:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:18,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:18,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938122123] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:18,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:18,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-02 08:19:18,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340041525] [2023-12-02 08:19:18,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:18,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:19:18,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:19:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-12-02 08:19:18,819 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:19:20,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:19:22,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:19:24,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:19:26,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:19:28,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:19:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:29,005 INFO L93 Difference]: Finished difference Result 192 states and 213 transitions. [2023-12-02 08:19:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:19:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-12-02 08:19:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:29,007 INFO L225 Difference]: With dead ends: 192 [2023-12-02 08:19:29,007 INFO L226 Difference]: Without dead ends: 192 [2023-12-02 08:19:29,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 08:19:29,008 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:29,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 5 Unknown, 0 Unchecked, 10.2s Time] [2023-12-02 08:19:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-02 08:19:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 179. [2023-12-02 08:19:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 147 states have internal predecessors, (161), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 08:19:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 206 transitions. [2023-12-02 08:19:29,015 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 206 transitions. Word has length 46 [2023-12-02 08:19:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:29,015 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 206 transitions. [2023-12-02 08:19:29,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 08:19:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 206 transitions. [2023-12-02 08:19:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 08:19:29,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:29,016 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:29,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 08:19:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 08:19:29,217 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:29,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -3746406, now seen corresponding path program 4 times [2023-12-02 08:19:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:29,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536927706] [2023-12-02 08:19:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:29,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536927706] [2023-12-02 08:19:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536927706] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562148396] [2023-12-02 08:19:29,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:19:29,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:29,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:29,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:29,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 08:19:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:29,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 08:19:29,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:29,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:29,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562148396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:29,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467030865] [2023-12-02 08:19:29,517 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 08:19:29,517 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:29,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:29,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:29,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:31,659 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 174 for LOIs [2023-12-02 08:19:31,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:19:31,970 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:36,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9509#(and (exists ((|v_ULTIMATE.start_finddup_#in~_i#1.base_24| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.offset_24| Int) (|v_ULTIMATE.start_finddup_~n#1_33| Int) (|v_ULTIMATE.start_finddup_~j~1#1_165| Int) (|v_ULTIMATE.start_finddup_#in~_i#1.offset_24| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_finddup_#in~_j#1.base_24| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_28| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_30| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_138| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_170| Int) (|v_ULTIMATE.start_finddup_#in~a#1.offset_24| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_29| Int) (|v_ULTIMATE.start_finddup_#in~n#1_24| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_29| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_finddup_~i~1#1_118| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_27| Int)) (and (<= 2 |v_ULTIMATE.start_finddup_#in~_j#1.base_24|) (<= 1 |v_ULTIMATE.start_finddup_~j~1#1_165|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_12|) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_28|) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_170| 1073741823) (<= 1 |v_ULTIMATE.start_finddup_~i~1#1_118|) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_138| 0) (<= |v_ULTIMATE.start_finddup_~n#1_33| 1073741823) (= |v_ULTIMATE.start_finddup_#in~a#1.offset_24| 0) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_12| 0) (= 0 |v_ULTIMATE.start_finddup_#in~_j#1.offset_24|) (= |v_ULTIMATE.start_finddup_~_j#1.offset_29| 0) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_17| 0) (= |v_ULTIMATE.start_main_#t~malloc13#1.offset_BEFORE_CALL_117| 0) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_27|) (<= 2 |v_ULTIMATE.start_finddup_#in~_i#1.base_24|) (<= |v_ULTIMATE.start_finddup_#in~n#1_24| 1073741823) (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_17|) (= |v_ULTIMATE.start_finddup_#in~_i#1.offset_24| 0) (<= |v_ULTIMATE.start_finddup_~n#1_33| |v_ULTIMATE.start_finddup_~i~1#1_118|) (<= |v_ULTIMATE.start_finddup_~n#1_33| |v_ULTIMATE.start_finddup_~j~1#1_165|) (= |v_ULTIMATE.start_finddup_~a#1.offset_29| 0) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_30|))) (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0))' at error location [2023-12-02 08:19:36,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:19:36,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:19:36,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-12-02 08:19:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489307128] [2023-12-02 08:19:36,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:19:36,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:19:36,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:19:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=659, Unknown=1, NotChecked=0, Total=756 [2023-12-02 08:19:36,126 INFO L87 Difference]: Start difference. First operand 179 states and 206 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:19:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:36,280 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2023-12-02 08:19:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:19:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-02 08:19:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:36,282 INFO L225 Difference]: With dead ends: 189 [2023-12-02 08:19:36,282 INFO L226 Difference]: Without dead ends: 189 [2023-12-02 08:19:36,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=167, Invalid=1092, Unknown=1, NotChecked=0, Total=1260 [2023-12-02 08:19:36,283 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 33 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:36,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 247 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-02 08:19:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 165. [2023-12-02 08:19:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 135 states have internal predecessors, (148), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 08:19:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2023-12-02 08:19:36,290 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 49 [2023-12-02 08:19:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:36,290 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2023-12-02 08:19:36,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:19:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2023-12-02 08:19:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 08:19:36,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:36,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:36,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 08:19:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 08:19:36,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:36,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1227693475, now seen corresponding path program 1 times [2023-12-02 08:19:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:36,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834061068] [2023-12-02 08:19:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:36,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:36,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834061068] [2023-12-02 08:19:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834061068] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355505202] [2023-12-02 08:19:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:36,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:36,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:36,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:36,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 08:19:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:36,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 08:19:36,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:36,988 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 08:19:37,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 08:19:37,214 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 19 treesize of output 18 [2023-12-02 08:19:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:37,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:37,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:19:37,853 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 706 treesize of output 654 [2023-12-02 08:19:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:19:38,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355505202] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769090517] [2023-12-02 08:19:38,331 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:19:38,331 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:38,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:38,332 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:38,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:40,142 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 08:19:40,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:19:40,149 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:54,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10248#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0))' at error location [2023-12-02 08:19:54,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:19:54,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:19:54,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 32 [2023-12-02 08:19:54,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777593986] [2023-12-02 08:19:54,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:19:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 08:19:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 08:19:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3059, Unknown=7, NotChecked=0, Total=3422 [2023-12-02 08:19:54,102 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:19:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:55,003 INFO L93 Difference]: Finished difference Result 245 states and 276 transitions. [2023-12-02 08:19:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 08:19:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2023-12-02 08:19:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:55,006 INFO L225 Difference]: With dead ends: 245 [2023-12-02 08:19:55,006 INFO L226 Difference]: Without dead ends: 243 [2023-12-02 08:19:55,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=587, Invalid=5106, Unknown=7, NotChecked=0, Total=5700 [2023-12-02 08:19:55,008 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 183 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:55,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 466 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:19:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-02 08:19:55,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2023-12-02 08:19:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 177 states have internal predecessors, (189), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-02 08:19:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 246 transitions. [2023-12-02 08:19:55,016 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 246 transitions. Word has length 54 [2023-12-02 08:19:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:55,016 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 246 transitions. [2023-12-02 08:19:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:19:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 246 transitions. [2023-12-02 08:19:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 08:19:55,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:55,017 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:55,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 08:19:55,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:55,218 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:19:55,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash -74025548, now seen corresponding path program 1 times [2023-12-02 08:19:55,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:55,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489511501] [2023-12-02 08:19:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:55,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:19:55,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:55,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489511501] [2023-12-02 08:19:55,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489511501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:55,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813772408] [2023-12-02 08:19:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:55,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:55,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:55,366 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:55,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 08:19:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:55,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 08:19:55,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:55,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 08:19:55,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-12-02 08:19:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:19:55,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:55,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 28 [2023-12-02 08:19:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:19:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813772408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:55,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812601382] [2023-12-02 08:19:55,950 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:19:55,950 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:55,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:55,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:55,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:57,937 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 08:19:57,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:19:57,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:27,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11113#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0))' at error location [2023-12-02 08:20:27,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:27,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:20:27,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-12-02 08:20:27,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166056724] [2023-12-02 08:20:27,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:27,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 08:20:27,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:27,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 08:20:27,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1791, Unknown=12, NotChecked=0, Total=1980 [2023-12-02 08:20:27,448 INFO L87 Difference]: Start difference. First operand 218 states and 246 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:20:29,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:31,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:33,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:35,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:37,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:39,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:41,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:41,880 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2023-12-02 08:20:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 08:20:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2023-12-02 08:20:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:41,882 INFO L225 Difference]: With dead ends: 230 [2023-12-02 08:20:41,882 INFO L226 Difference]: Without dead ends: 230 [2023-12-02 08:20:41,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=248, Invalid=2496, Unknown=12, NotChecked=0, Total=2756 [2023-12-02 08:20:41,882 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 9 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:41,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 551 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 488 Invalid, 7 Unknown, 0 Unchecked, 14.3s Time] [2023-12-02 08:20:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-12-02 08:20:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2023-12-02 08:20:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 123 states have internal predecessors, (130), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 08:20:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2023-12-02 08:20:41,887 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 55 [2023-12-02 08:20:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:41,888 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2023-12-02 08:20:41,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:20:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2023-12-02 08:20:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 08:20:41,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:41,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:41,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 08:20:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 08:20:42,095 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:20:42,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1757682419, now seen corresponding path program 1 times [2023-12-02 08:20:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:42,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636012169] [2023-12-02 08:20:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 08:20:42,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636012169] [2023-12-02 08:20:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636012169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882134328] [2023-12-02 08:20:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:42,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:42,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:42,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 08:20:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:42,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 08:20:42,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:42,767 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 08:20:43,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 08:20:43,066 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 29 treesize of output 17 [2023-12-02 08:20:43,793 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 08:20:43,793 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 42 treesize of output 26 [2023-12-02 08:20:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 08:20:43,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:43,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882134328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:43,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:43,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2023-12-02 08:20:43,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944208615] [2023-12-02 08:20:43,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 08:20:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:43,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 08:20:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-12-02 08:20:43,823 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 08:20:45,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:20:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:46,260 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2023-12-02 08:20:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 08:20:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2023-12-02 08:20:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:46,261 INFO L225 Difference]: With dead ends: 151 [2023-12-02 08:20:46,261 INFO L226 Difference]: Without dead ends: 151 [2023-12-02 08:20:46,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2023-12-02 08:20:46,262 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:46,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 08:20:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-02 08:20:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-12-02 08:20:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 116 states have (on average 1.103448275862069) internal successors, (128), 122 states have internal predecessors, (128), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 08:20:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2023-12-02 08:20:46,267 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 58 [2023-12-02 08:20:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:46,267 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2023-12-02 08:20:46,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 08:20:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2023-12-02 08:20:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 08:20:46,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:46,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:46,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 08:20:46,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 08:20:46,469 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:20:46,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1210655664, now seen corresponding path program 1 times [2023-12-02 08:20:46,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:46,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23540608] [2023-12-02 08:20:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:46,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 08:20:46,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:46,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23540608] [2023-12-02 08:20:46,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23540608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:46,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:20:46,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 08:20:46,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073915126] [2023-12-02 08:20:46,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:20:46,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:20:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:20:46,777 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 08:20:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:47,040 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2023-12-02 08:20:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:20:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2023-12-02 08:20:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:47,042 INFO L225 Difference]: With dead ends: 202 [2023-12-02 08:20:47,042 INFO L226 Difference]: Without dead ends: 202 [2023-12-02 08:20:47,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:20:47,043 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:47,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-02 08:20:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-12-02 08:20:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 151 states have (on average 1.099337748344371) internal successors, (166), 158 states have internal predecessors, (166), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 08:20:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 217 transitions. [2023-12-02 08:20:47,049 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 217 transitions. Word has length 60 [2023-12-02 08:20:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:47,050 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 217 transitions. [2023-12-02 08:20:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 08:20:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 217 transitions. [2023-12-02 08:20:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 08:20:47,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:47,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 08:20:47,051 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:20:47,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash -727661612, now seen corresponding path program 1 times [2023-12-02 08:20:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:47,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888737646] [2023-12-02 08:20:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:20:47,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888737646] [2023-12-02 08:20:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888737646] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59413227] [2023-12-02 08:20:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:47,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:47,130 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:47,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 08:20:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:47,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:20:47,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 08:20:47,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:47,395 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 08:20:47,396 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 12 treesize of output 11 [2023-12-02 08:20:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 08:20:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59413227] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040161124] [2023-12-02 08:20:47,409 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-12-02 08:20:47,409 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:47,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:47,410 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:47,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:49,102 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 08:20:49,105 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:20:49,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:57,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12833#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) 0) 1) |ULTIMATE.start_main_~n~0#1|) (= (select |#valid| |ULTIMATE.start_main_~#j~2#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) 0))) (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~#i~2#1.base|)) (exists ((|v_ULTIMATE.start_finddup_~a#1.base_40| Int) (|v_#memory_int_145| (Array Int (Array Int Int))) (|v_ULTIMATE.start_finddup_~_j#1.base_39| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_37| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_finddup_~_i#1.base_37|)) (<= 4 (select |#length| |v_ULTIMATE.start_finddup_~_j#1.base_39|)) (= (select |#valid| |v_ULTIMATE.start_finddup_~a#1.base_40|) 1) (= (select |#valid| |v_ULTIMATE.start_finddup_~_j#1.base_39|) 1) (= (select (select |v_#memory_int_145| |v_ULTIMATE.start_finddup_~a#1.base_40|) (* (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_39|) 0) 4)) (select (select |v_#memory_int_145| |v_ULTIMATE.start_finddup_~a#1.base_40|) 0)) (<= 1 (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_39|) 0)) (= |#memory_int| (store (store |v_#memory_int_145| |v_ULTIMATE.start_finddup_~_i#1.base_37| (store (select |v_#memory_int_145| |v_ULTIMATE.start_finddup_~_i#1.base_37|) 0 0)) |v_ULTIMATE.start_finddup_~_j#1.base_39| (store (select (store |v_#memory_int_145| |v_ULTIMATE.start_finddup_~_i#1.base_37| (store (select |v_#memory_int_145| |v_ULTIMATE.start_finddup_~_i#1.base_37|) 0 0)) |v_ULTIMATE.start_finddup_~_j#1.base_39|) 0 (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_39|) 0)))) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_37|) (<= (+ (* (select (select |#memory_int| |v_ULTIMATE.start_finddup_~_j#1.base_39|) 0) 4) 4) (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_40|)) (= (select |#valid| |v_ULTIMATE.start_finddup_~_i#1.base_37|) 1) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_39|))) (= |ULTIMATE.start_finddup_#res#1| 1) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) 0)) (= (select |#valid| |ULTIMATE.start_main_~#i~2#1.base|) 1) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (<= 4 (select |#length| |ULTIMATE.start_main_~#j~2#1.base|)) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) 0)) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) 0) 1) |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2023-12-02 08:20:57,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:57,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:20:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2023-12-02 08:20:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87879415] [2023-12-02 08:20:57,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:57,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:20:57,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:20:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1572, Unknown=1, NotChecked=0, Total=1806 [2023-12-02 08:20:57,228 INFO L87 Difference]: Start difference. First operand 194 states and 217 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 08:20:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:57,309 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2023-12-02 08:20:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:20:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 62 [2023-12-02 08:20:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:57,311 INFO L225 Difference]: With dead ends: 191 [2023-12-02 08:20:57,311 INFO L226 Difference]: Without dead ends: 191 [2023-12-02 08:20:57,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=233, Invalid=1572, Unknown=1, NotChecked=0, Total=1806 [2023-12-02 08:20:57,311 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:57,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-02 08:20:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-12-02 08:20:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 155 states have internal predecessors, (161), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 08:20:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2023-12-02 08:20:57,317 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 62 [2023-12-02 08:20:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:57,317 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2023-12-02 08:20:57,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 08:20:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2023-12-02 08:20:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 08:20:57,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:57,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:57,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 08:20:57,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:57,519 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:20:57,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1031438541, now seen corresponding path program 1 times [2023-12-02 08:20:57,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:57,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020424772] [2023-12-02 08:20:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:20:57,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020424772] [2023-12-02 08:20:57,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020424772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407423209] [2023-12-02 08:20:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:57,960 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:57,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 08:20:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:58,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 08:20:58,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:58,065 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 08:20:58,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 08:20:58,497 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 19 treesize of output 18 [2023-12-02 08:20:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:20:59,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:59,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:20:59,157 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 706 treesize of output 654 [2023-12-02 08:21:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:21:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407423209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851614465] [2023-12-02 08:21:00,395 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:21:00,395 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:00,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:00,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:00,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:02,016 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 08:21:02,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 08:21:02,021 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:10,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13656#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond#1| 0) (= |__VERIFIER_assert_~cond#1| 0))' at error location [2023-12-02 08:21:10,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:10,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:21:10,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2023-12-02 08:21:10,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114193952] [2023-12-02 08:21:10,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:11,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 08:21:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:11,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 08:21:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=4784, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 08:21:11,002 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:21:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:12,717 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2023-12-02 08:21:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 08:21:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 62 [2023-12-02 08:21:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:12,719 INFO L225 Difference]: With dead ends: 289 [2023-12-02 08:21:12,720 INFO L226 Difference]: Without dead ends: 289 [2023-12-02 08:21:12,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3647 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=746, Invalid=8956, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 08:21:12,721 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 179 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:12,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 648 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:21:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-12-02 08:21:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 227. [2023-12-02 08:21:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 181 states have (on average 1.0828729281767955) internal successors, (196), 185 states have internal predecessors, (196), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-02 08:21:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 249 transitions. [2023-12-02 08:21:12,729 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 249 transitions. Word has length 62 [2023-12-02 08:21:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:12,729 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 249 transitions. [2023-12-02 08:21:12,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:21:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 249 transitions. [2023-12-02 08:21:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 08:21:12,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:12,731 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:12,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 08:21:12,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:12,932 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-02 08:21:12,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash -39742829, now seen corresponding path program 1 times [2023-12-02 08:21:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:12,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251392462] [2023-12-02 08:21:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 08:21:13,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251392462] [2023-12-02 08:21:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251392462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617450380] [2023-12-02 08:21:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:13,917 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:13,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1df98c8-6e92-4825-a332-40471883b4ab/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 08:21:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:14,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 102 conjunts are in the unsatisfiable core [2023-12-02 08:21:14,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:14,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 08:21:14,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2023-12-02 08:21:14,440 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 08:21:14,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 37 treesize of output 30 [2023-12-02 08:21:15,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:21:15,586 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 88 treesize of output 76 [2023-12-02 08:21:15,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-12-02 08:21:15,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:21:15,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:21:15,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 82 [2023-12-02 08:21:15,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 08:21:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:21:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 08:21:28,723 INFO L349 Elim1Store]: treesize reduction 4, result has 98.5 percent of original size [2023-12-02 08:21:28,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 232 treesize of output 452