./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 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5 --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 0.2.3-dev-527bcce [2023-11-21 19:00:10,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:00:11,016 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 19:00:11,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:00:11,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:00:11,046 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:00:11,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:00:11,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:00:11,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:00:11,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:00:11,049 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:00:11,050 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:00:11,050 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:00:11,051 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:00:11,051 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:00:11,052 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:00:11,053 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:00:11,053 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:00:11,054 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:00:11,054 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:00:11,055 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:00:11,055 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:00:11,056 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:00:11,056 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:00:11,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:00:11,057 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:00:11,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:00:11,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:00:11,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:00:11,059 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:00:11,060 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:00:11,060 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:00:11,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:00:11,061 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:00:11,061 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:00:11,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:00:11,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:00:11,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:00:11,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:00:11,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:00:11,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:11,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:00:11,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:00:11,063 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:00:11,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:00:11,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:00:11,064 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:00:11,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:00:11,064 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_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2023-11-21 19:00:11,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:00:11,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:00:11,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:00:11,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:00:11,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:00:11,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/verifythis/duplets.c [2023-11-21 19:00:14,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:00:14,736 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:00:14,736 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/sv-benchmarks/c/verifythis/duplets.c [2023-11-21 19:00:14,745 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/data/7d99e81da/30c8986de5a2456ebacd927896644130/FLAG75368badf [2023-11-21 19:00:14,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/data/7d99e81da/30c8986de5a2456ebacd927896644130 [2023-11-21 19:00:14,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:00:14,764 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:00:14,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:14,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:00:14,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:00:14,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:14" (1/1) ... [2023-11-21 19:00:14,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393c6d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:14, skipping insertion in model container [2023-11-21 19:00:14,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:14" (1/1) ... [2023-11-21 19:00:14,799 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:00:14,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:14,994 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:00:15,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:15,059 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:00:15,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15 WrapperNode [2023-11-21 19:00:15,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:15,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:15,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:00:15,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:00:15,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,134 INFO L138 Inliner]: procedures = 21, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-11-21 19:00:15,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:15,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:00:15,136 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:00:15,136 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:00:15,147 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,179 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,181 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,184 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:00:15,185 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:00:15,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:00:15,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:00:15,186 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (1/1) ... [2023-11-21 19:00:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:15,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:00:15,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:00:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:00:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:00:15,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:00:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:00:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:00:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:00:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:00:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:00:15,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:00:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:00:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:00:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:00:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:00:15,358 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:00:15,360 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:00:15,820 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:00:15,906 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:00:15,907 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 19:00:15,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:15 BoogieIcfgContainer [2023-11-21 19:00:15,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:00:15,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:00:15,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:00:15,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:00:15,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:00:14" (1/3) ... [2023-11-21 19:00:15,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f70bea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:15, skipping insertion in model container [2023-11-21 19:00:15,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:15" (2/3) ... [2023-11-21 19:00:15,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f70bea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:15, skipping insertion in model container [2023-11-21 19:00:15,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:15" (3/3) ... [2023-11-21 19:00:15,926 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2023-11-21 19:00:15,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:00:15,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-11-21 19:00:16,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:16,007 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;@53a2ff7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:16,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-11-21 19:00:16,011 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) [2023-11-21 19:00:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:00:16,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:16,019 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:16,020 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)] === [2023-11-21 19:00:16,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1662355982, now seen corresponding path program 1 times [2023-11-21 19:00:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175060262] [2023-11-21 19:00:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:16,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175060262] [2023-11-21 19:00:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175060262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:16,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:16,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:00:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022608627] [2023-11-21 19:00:16,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:16,590 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) [2023-11-21 19:00:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:16,760 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2023-11-21 19:00:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:16,763 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 [2023-11-21 19:00:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:16,772 INFO L225 Difference]: With dead ends: 85 [2023-11-21 19:00:16,773 INFO L226 Difference]: Without dead ends: 84 [2023-11-21 19:00:16,774 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 [2023-11-21 19:00:16,778 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 [2023-11-21 19:00:16,782 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] [2023-11-21 19:00:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-21 19:00:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-21 19:00:16,840 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) [2023-11-21 19:00:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-11-21 19:00:16,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2023-11-21 19:00:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:16,846 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-11-21 19:00:16,846 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) [2023-11-21 19:00:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-11-21 19:00:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:00:16,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:16,848 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:00:16,848 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)] === [2023-11-21 19:00:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1662355981, now seen corresponding path program 1 times [2023-11-21 19:00:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935339826] [2023-11-21 19:00:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:00:17,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:17,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935339826] [2023-11-21 19:00:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935339826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371789112] [2023-11-21 19:00:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:17,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:00:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:17,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 19:00:17,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:17,657 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 [2023-11-21 19:00:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:00:18,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:00:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371789112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011840359] [2023-11-21 19:00:18,388 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 19:00:18,388 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:18,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:18,398 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:18,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:19,808 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:00:19,810 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1011840359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:21,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:00:21,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2023-11-21 19:00:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170131068] [2023-11-21 19:00:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:00:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:00:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:00:21,294 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) [2023-11-21 19:00:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:21,806 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-11-21 19:00:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 19:00:21,807 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 [2023-11-21 19:00:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:21,809 INFO L225 Difference]: With dead ends: 83 [2023-11-21 19:00:21,809 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 19:00:21,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:00:21,811 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:21,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 193 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:00:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 19:00:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 19:00:21,821 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) [2023-11-21 19:00:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-11-21 19:00:21,824 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2023-11-21 19:00:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:21,824 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-11-21 19:00:21,825 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) [2023-11-21 19:00:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-11-21 19:00:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 19:00:21,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:21,826 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:21,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:22,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:22,052 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)] === [2023-11-21 19:00:22,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash 6572095, now seen corresponding path program 1 times [2023-11-21 19:00:22,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:22,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112756949] [2023-11-21 19:00:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:22,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:00:22,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:22,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112756949] [2023-11-21 19:00:22,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112756949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:22,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776913132] [2023-11-21 19:00:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:22,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:22,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:00:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:22,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 19:00:22,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:22,427 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 [2023-11-21 19:00:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:23,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 19:00:24,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776913132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675327644] [2023-11-21 19:00:24,576 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-21 19:00:24,576 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:24,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:24,577 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:24,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:25,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:00:25,670 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:27,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [675327644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:27,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:00:27,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 8, 7] total 27 [2023-11-21 19:00:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973492968] [2023-11-21 19:00:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 19:00:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 19:00:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-11-21 19:00:27,541 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) [2023-11-21 19:00:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:28,466 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-11-21 19:00:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:00:28,470 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 [2023-11-21 19:00:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:28,471 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:00:28,472 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 19:00:28,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-11-21 19:00:28,474 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 80 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:28,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 225 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 19:00:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 19:00:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-21 19:00:28,483 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) [2023-11-21 19:00:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2023-11-21 19:00:28,485 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2023-11-21 19:00:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:28,485 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2023-11-21 19:00:28,486 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) [2023-11-21 19:00:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2023-11-21 19:00:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 19:00:28,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:28,487 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:28,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:28,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:28,711 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)] === [2023-11-21 19:00:28,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1774480417, now seen corresponding path program 1 times [2023-11-21 19:00:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180082118] [2023-11-21 19:00:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:28,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:28,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180082118] [2023-11-21 19:00:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180082118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:28,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:00:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217106494] [2023-11-21 19:00:28,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:00:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:00:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:00:28,985 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) [2023-11-21 19:00:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:29,097 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-11-21 19:00:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:00:29,098 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 [2023-11-21 19:00:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:29,099 INFO L225 Difference]: With dead ends: 80 [2023-11-21 19:00:29,099 INFO L226 Difference]: Without dead ends: 80 [2023-11-21 19:00:29,100 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 [2023-11-21 19:00:29,101 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 [2023-11-21 19:00:29,102 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] [2023-11-21 19:00:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-21 19:00:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-21 19:00:29,110 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) [2023-11-21 19:00:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-21 19:00:29,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 20 [2023-11-21 19:00:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:29,112 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-21 19:00:29,113 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) [2023-11-21 19:00:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-21 19:00:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 19:00:29,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:29,114 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:29,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:00:29,115 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)] === [2023-11-21 19:00:29,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1774480416, now seen corresponding path program 1 times [2023-11-21 19:00:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494648913] [2023-11-21 19:00:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:29,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:29,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494648913] [2023-11-21 19:00:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494648913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:29,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:29,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:00:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045544977] [2023-11-21 19:00:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:00:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:00:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:29,368 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) [2023-11-21 19:00:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:29,619 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-11-21 19:00:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:29,620 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 [2023-11-21 19:00:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:29,623 INFO L225 Difference]: With dead ends: 91 [2023-11-21 19:00:29,623 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 19:00:29,623 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 [2023-11-21 19:00:29,627 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-21 19:00:29,628 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] [2023-11-21 19:00:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 19:00:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2023-11-21 19:00:29,653 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) [2023-11-21 19:00:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2023-11-21 19:00:29,660 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 20 [2023-11-21 19:00:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2023-11-21 19:00:29,661 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) [2023-11-21 19:00:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2023-11-21 19:00:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:00:29,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:29,662 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:29,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:00:29,663 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)] === [2023-11-21 19:00:29,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 825681930, now seen corresponding path program 1 times [2023-11-21 19:00:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499383267] [2023-11-21 19:00:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:30,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:30,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499383267] [2023-11-21 19:00:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499383267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:30,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:30,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:00:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404591394] [2023-11-21 19:00:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 19:00:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 19:00:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:00:30,477 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:00:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:30,851 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2023-11-21 19:00:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:00:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-21 19:00:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:30,853 INFO L225 Difference]: With dead ends: 104 [2023-11-21 19:00:30,853 INFO L226 Difference]: Without dead ends: 104 [2023-11-21 19:00:30,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:00:30,854 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:30,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 309 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:00:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-21 19:00:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2023-11-21 19:00:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.826086956521739) internal successors, (84), 74 states have internal predecessors, (84), 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) [2023-11-21 19:00:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2023-11-21 19:00:30,874 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 21 [2023-11-21 19:00:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:30,875 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2023-11-21 19:00:30,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:00:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2023-11-21 19:00:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:00:30,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:30,877 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] [2023-11-21 19:00:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:00:30,877 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)] === [2023-11-21 19:00:30,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -885966156, now seen corresponding path program 1 times [2023-11-21 19:00:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:30,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344614783] [2023-11-21 19:00:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:31,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:31,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344614783] [2023-11-21 19:00:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344614783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794511384] [2023-11-21 19:00:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:31,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:31,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:31,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:00:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:31,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 19:00:31,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:31,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794511384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960498620] [2023-11-21 19:00:31,384 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-21 19:00:31,384 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:31,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:31,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:31,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:32,324 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:00:32,325 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:34,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1960498620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:34,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:00:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 6, 6] total 24 [2023-11-21 19:00:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832664733] [2023-11-21 19:00:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 19:00:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 19:00:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:00:34,427 INFO L87 Difference]: Start difference. First operand 86 states and 102 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) [2023-11-21 19:00:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:35,768 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2023-11-21 19:00:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 19:00:35,769 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 [2023-11-21 19:00:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:35,770 INFO L225 Difference]: With dead ends: 88 [2023-11-21 19:00:35,770 INFO L226 Difference]: Without dead ends: 88 [2023-11-21 19:00:35,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:00:35,772 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:35,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 195 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 19:00:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-21 19:00:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2023-11-21 19:00:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 75 states have internal predecessors, (84), 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) [2023-11-21 19:00:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-11-21 19:00:35,780 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 23 [2023-11-21 19:00:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:35,780 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-11-21 19:00:35,780 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) [2023-11-21 19:00:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-11-21 19:00:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 19:00:35,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:35,782 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:35,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:36,003 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)] === [2023-11-21 19:00:36,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -169323258, now seen corresponding path program 1 times [2023-11-21 19:00:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125447864] [2023-11-21 19:00:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:36,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125447864] [2023-11-21 19:00:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125447864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344317769] [2023-11-21 19:00:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:36,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:36,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:36,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:36,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:00:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:36,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:00:36,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:36,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:00:36,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344317769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:00:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-21 19:00:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629624569] [2023-11-21 19:00:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:36,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:00:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:00:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:00:36,176 INFO L87 Difference]: Start difference. First operand 87 states and 102 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) [2023-11-21 19:00:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:36,241 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-11-21 19:00:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:00:36,244 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 [2023-11-21 19:00:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:36,245 INFO L225 Difference]: With dead ends: 105 [2023-11-21 19:00:36,245 INFO L226 Difference]: Without dead ends: 105 [2023-11-21 19:00:36,246 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 [2023-11-21 19:00:36,247 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:36,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 211 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:00:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-21 19:00:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2023-11-21 19:00:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 77 states have internal predecessors, (87), 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) [2023-11-21 19:00:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2023-11-21 19:00:36,253 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 22 [2023-11-21 19:00:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:36,254 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2023-11-21 19:00:36,254 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) [2023-11-21 19:00:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2023-11-21 19:00:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:00:36,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:36,256 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] [2023-11-21 19:00:36,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:36,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:36,463 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)] === [2023-11-21 19:00:36,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash 612655591, now seen corresponding path program 1 times [2023-11-21 19:00:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:36,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337959614] [2023-11-21 19:00:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:36,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:36,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337959614] [2023-11-21 19:00:36,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337959614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:36,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:36,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:00:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102533577] [2023-11-21 19:00:36,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:36,582 INFO L87 Difference]: Start difference. First operand 89 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) [2023-11-21 19:00:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:36,641 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-11-21 19:00:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:36,641 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 [2023-11-21 19:00:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:36,642 INFO L225 Difference]: With dead ends: 88 [2023-11-21 19:00:36,643 INFO L226 Difference]: Without dead ends: 88 [2023-11-21 19:00:36,643 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 [2023-11-21 19:00:36,644 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:36,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:00:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-21 19:00:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-21 19:00:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 76 states have internal predecessors, (86), 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) [2023-11-21 19:00:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2023-11-21 19:00:36,650 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 24 [2023-11-21 19:00:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:36,651 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2023-11-21 19:00:36,651 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) [2023-11-21 19:00:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2023-11-21 19:00:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:00:36,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:36,655 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] [2023-11-21 19:00:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:00:36,656 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)] === [2023-11-21 19:00:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash 612655592, now seen corresponding path program 1 times [2023-11-21 19:00:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059612244] [2023-11-21 19:00:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:36,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059612244] [2023-11-21 19:00:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059612244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:00:36,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82045888] [2023-11-21 19:00:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:36,781 INFO L87 Difference]: Start difference. First operand 88 states and 104 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) [2023-11-21 19:00:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:36,844 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2023-11-21 19:00:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:36,845 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 [2023-11-21 19:00:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:36,846 INFO L225 Difference]: With dead ends: 87 [2023-11-21 19:00:36,846 INFO L226 Difference]: Without dead ends: 87 [2023-11-21 19:00:36,846 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 [2023-11-21 19:00:36,847 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:36,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:00:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-21 19:00:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-11-21 19:00:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 75 states have internal predecessors, (85), 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) [2023-11-21 19:00:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2023-11-21 19:00:36,854 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 24 [2023-11-21 19:00:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:36,854 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2023-11-21 19:00:36,854 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) [2023-11-21 19:00:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2023-11-21 19:00:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 19:00:36,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:36,856 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] [2023-11-21 19:00:36,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:00:36,856 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)] === [2023-11-21 19:00:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1814945842, now seen corresponding path program 1 times [2023-11-21 19:00:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713323678] [2023-11-21 19:00:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:37,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713323678] [2023-11-21 19:00:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713323678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:37,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:37,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 19:00:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127859847] [2023-11-21 19:00:37,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 19:00:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 19:00:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:00:37,339 INFO L87 Difference]: Start difference. First operand 87 states and 103 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) [2023-11-21 19:00:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:37,644 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2023-11-21 19:00:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:00:37,644 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 [2023-11-21 19:00:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:37,645 INFO L225 Difference]: With dead ends: 90 [2023-11-21 19:00:37,646 INFO L226 Difference]: Without dead ends: 90 [2023-11-21 19:00:37,646 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 [2023-11-21 19:00:37,647 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:37,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 335 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:00:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-21 19:00:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2023-11-21 19:00:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 75 states have internal predecessors, (84), 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) [2023-11-21 19:00:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-11-21 19:00:37,651 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 25 [2023-11-21 19:00:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:37,652 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-11-21 19:00:37,652 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) [2023-11-21 19:00:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-11-21 19:00:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 19:00:37,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:37,653 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] [2023-11-21 19:00:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:00:37,653 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)] === [2023-11-21 19:00:37,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1816316994, now seen corresponding path program 1 times [2023-11-21 19:00:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:37,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789739108] [2023-11-21 19:00:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:00:38,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789739108] [2023-11-21 19:00:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789739108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:38,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396870279] [2023-11-21 19:00:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:38,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:38,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:00:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:38,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-21 19:00:38,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:38,376 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 [2023-11-21 19:00:38,769 INFO L349 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-11-21 19:00:38,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2023-11-21 19:00:38,888 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 28 [2023-11-21 19:00:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:38,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 20 [2023-11-21 19:00:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:38,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 19:00:38,940 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 28 [2023-11-21 19:00:38,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:38,963 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 [2023-11-21 19:00:38,990 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 19:00:38,990 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 11 treesize of output 11 [2023-11-21 19:00:39,303 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 43 treesize of output 33 [2023-11-21 19:00:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:00:39,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:40,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:00:40,150 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 97 treesize of output 99 [2023-11-21 19:00:40,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:00:40,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 99 [2023-11-21 19:00:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396870279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061516230] [2023-11-21 19:00:41,241 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-21 19:00:41,242 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:41,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:41,243 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:41,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:43,397 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:00:43,398 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:48,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2657#(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 [2023-11-21 19:00:48,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:00:48,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:00:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-21 19:00:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080455409] [2023-11-21 19:00:48,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:48,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 19:00:48,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 19:00:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2023-11-21 19:00:48,462 INFO L87 Difference]: Start difference. First operand 87 states and 102 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) [2023-11-21 19:00:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:50,969 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2023-11-21 19:00:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 19:00:50,970 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 [2023-11-21 19:00:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:50,971 INFO L225 Difference]: With dead ends: 104 [2023-11-21 19:00:50,971 INFO L226 Difference]: Without dead ends: 104 [2023-11-21 19:00:50,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=382, Invalid=3040, Unknown=0, NotChecked=0, Total=3422 [2023-11-21 19:00:50,973 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 145 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 332 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 19:00:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-21 19:00:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2023-11-21 19:00:50,978 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) [2023-11-21 19:00:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-11-21 19:00:50,979 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 25 [2023-11-21 19:00:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:50,980 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-11-21 19:00:50,980 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) [2023-11-21 19:00:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-11-21 19:00:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 19:00:50,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:50,981 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] [2023-11-21 19:00:51,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:00:51,191 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)] === [2023-11-21 19:00:51,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 475592654, now seen corresponding path program 1 times [2023-11-21 19:00:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780300779] [2023-11-21 19:00:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:51,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:51,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780300779] [2023-11-21 19:00:51,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780300779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:51,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860865672] [2023-11-21 19:00:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:51,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:51,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:51,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:00:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:51,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:00:51,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:51,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860865672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731710693] [2023-11-21 19:00:51,446 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-21 19:00:51,446 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:51,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:51,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:51,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:53,839 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:00:53,840 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:57,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3048#(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 [2023-11-21 19:00:57,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:00:57,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:00:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-11-21 19:00:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789082722] [2023-11-21 19:00:57,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:00:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:00:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-11-21 19:00:57,100 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) [2023-11-21 19:00:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:57,202 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2023-11-21 19:00:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:00:57,203 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 [2023-11-21 19:00:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:57,207 INFO L225 Difference]: With dead ends: 121 [2023-11-21 19:00:57,208 INFO L226 Difference]: Without dead ends: 121 [2023-11-21 19:00:57,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:00:57,209 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 [2023-11-21 19:00:57,210 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] [2023-11-21 19:00:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-21 19:00:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2023-11-21 19:00:57,215 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) [2023-11-21 19:00:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-11-21 19:00:57,217 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 26 [2023-11-21 19:00:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:57,217 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-11-21 19:00:57,217 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) [2023-11-21 19:00:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-11-21 19:00:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:00:57,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:57,224 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] [2023-11-21 19:00:57,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 19:00:57,439 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)] === [2023-11-21 19:00:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -87623705, now seen corresponding path program 1 times [2023-11-21 19:00:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116431091] [2023-11-21 19:00:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:57,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116431091] [2023-11-21 19:00:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116431091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:00:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566276869] [2023-11-21 19:00:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:00:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:00:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:00:57,514 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) [2023-11-21 19:00:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:57,596 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2023-11-21 19:00:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:00:57,597 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 [2023-11-21 19:00:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:57,598 INFO L225 Difference]: With dead ends: 149 [2023-11-21 19:00:57,598 INFO L226 Difference]: Without dead ends: 149 [2023-11-21 19:00:57,598 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 [2023-11-21 19:00:57,599 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 92 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:57,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 352 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:00:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-21 19:00:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2023-11-21 19:00:57,604 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) [2023-11-21 19:00:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2023-11-21 19:00:57,605 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 29 [2023-11-21 19:00:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:57,606 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2023-11-21 19:00:57,606 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) [2023-11-21 19:00:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2023-11-21 19:00:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:00:57,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:57,607 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] [2023-11-21 19:00:57,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 19:00:57,608 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)] === [2023-11-21 19:00:57,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -513726458, now seen corresponding path program 1 times [2023-11-21 19:00:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:57,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105969281] [2023-11-21 19:00:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:57,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:57,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:57,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105969281] [2023-11-21 19:00:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105969281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:57,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552189299] [2023-11-21 19:00:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:57,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:57,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640a0675-3d56-4223-aff5-580c0f8cc46c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:00:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:57,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:00:57,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:57,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:00:57,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552189299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640942027] [2023-11-21 19:00:57,826 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-21 19:00:57,826 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:57,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:57,827 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:57,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:01:01,038 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 174 for LOIs [2023-11-21 19:01:01,609 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:01:01,612 INFO L180 IcfgInterpreter]: Interpretation finished