./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 a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje --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 0.2.5-dev-a016563 [2024-11-09 06:01:28,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:01:28,493 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:01:28,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:01:28,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:01:28,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:01:28,542 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:01:28,543 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:01:28,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:01:28,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:01:28,546 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:01:28,547 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:01:28,547 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:01:28,547 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:01:28,548 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:01:28,548 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:01:28,548 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:01:28,549 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:01:28,549 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:01:28,550 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:01:28,550 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:01:28,555 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:01:28,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:01:28,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:01:28,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:01:28,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:01:28,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:01:28,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:01:28,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:01:28,557 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:01:28,558 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:01:28,561 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:01:28,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:01:28,563 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:01:28,563 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:01:28,564 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:01:28,564 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:01:28,564 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:01:28,565 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:01:28,565 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:01:28,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:01:28,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:01:28,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:01:28,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:01:28,567 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:01:28,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:01:28,567 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:01:28,568 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:01:28,568 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:01:28,569 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_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2024-11-09 06:01:28,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:01:28,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:01:28,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:01:28,940 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:01:28,941 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:01:28,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/verifythis/duplets.c Unable to find full path for "g++" [2024-11-09 06:01:31,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:01:31,298 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:01:31,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/sv-benchmarks/c/verifythis/duplets.c [2024-11-09 06:01:31,308 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/data/9dd4a037a/4cc497ddbf6e41e18355b247d547540f/FLAG946359721 [2024-11-09 06:01:31,662 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/data/9dd4a037a/4cc497ddbf6e41e18355b247d547540f [2024-11-09 06:01:31,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:01:31,667 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:01:31,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:01:31,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:01:31,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:01:31,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:01:31" (1/1) ... [2024-11-09 06:01:31,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382f95ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:31, skipping insertion in model container [2024-11-09 06:01:31,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:01:31" (1/1) ... [2024-11-09 06:01:31,713 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:01:31,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:01:31,985 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:01:32,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:01:32,048 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:01:32,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32 WrapperNode [2024-11-09 06:01:32,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:01:32,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:01:32,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:01:32,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:01:32,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,118 INFO L138 Inliner]: procedures = 21, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2024-11-09 06:01:32,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:01:32,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:01:32,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:01:32,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:01:32,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:01:32,160 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:01:32,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:01:32,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:01:32,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (1/1) ... [2024-11-09 06:01:32,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:01:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:32,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:01:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:01:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:01:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 06:01:32,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 06:01:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:01:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:01:32,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:01:32,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 06:01:32,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:01:32,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:01:32,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:01:32,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:01:32,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:01:32,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:01:32,381 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:01:32,384 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:01:32,973 INFO L? ?]: Removed 110 outVars from TransFormulas that were not future-live. [2024-11-09 06:01:32,973 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:01:33,083 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:01:33,084 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:01:33,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:01:33 BoogieIcfgContainer [2024-11-09 06:01:33,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:01:33,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:01:33,089 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:01:33,093 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:01:33,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:01:31" (1/3) ... [2024-11-09 06:01:33,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3241618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:01:33, skipping insertion in model container [2024-11-09 06:01:33,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:01:32" (2/3) ... [2024-11-09 06:01:33,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3241618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:01:33, skipping insertion in model container [2024-11-09 06:01:33,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:01:33" (3/3) ... [2024-11-09 06:01:33,100 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2024-11-09 06:01:33,125 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:01:33,125 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-09 06:01:33,201 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:01:33,212 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3c858d15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:01:33,213 INFO L334 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-11-09 06:01:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 79 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) [2024-11-09 06:01:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 06:01:33,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:33,229 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:33,230 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:33,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2086756062, now seen corresponding path program 1 times [2024-11-09 06:01:33,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122195691] [2024-11-09 06:01:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:33,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:33,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122195691] [2024-11-09 06:01:33,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122195691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:33,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:33,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:01:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184005838] [2024-11-09 06:01:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:33,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:01:33,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:01:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:01:33,799 INFO L87 Difference]: Start difference. First operand has 91 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 79 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) 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) [2024-11-09 06:01:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:33,974 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2024-11-09 06:01:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:01:33,977 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 [2024-11-09 06:01:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:33,988 INFO L225 Difference]: With dead ends: 89 [2024-11-09 06:01:33,988 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 06:01:33,990 INFO L431 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 [2024-11-09 06:01:33,995 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:33,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:01:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 06:01:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-09 06:01:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 76 states have internal predecessors, (83), 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) [2024-11-09 06:01:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-11-09 06:01:34,042 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 16 [2024-11-09 06:01:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:34,044 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-11-09 06:01:34,044 INFO L472 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) [2024-11-09 06:01:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-11-09 06:01:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 06:01:34,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:34,046 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:34,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:01:34,047 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:34,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2086756063, now seen corresponding path program 1 times [2024-11-09 06:01:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:34,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295923643] [2024-11-09 06:01:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 06:01:34,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:34,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295923643] [2024-11-09 06:01:34,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295923643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:34,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121704272] [2024-11-09 06:01:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:34,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:34,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:34,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:01:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:34,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:01:34,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:34,800 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 10 treesize of output 9 [2024-11-09 06:01:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:01:35,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 06:01:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121704272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692316207] [2024-11-09 06:01:36,298 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:01:36,299 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:36,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:01:36,310 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:01:36,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:37,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:01:37,435 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:40,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1692316207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:40,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:40,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2024-11-09 06:01:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919519942] [2024-11-09 06:01:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:40,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 06:01:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 06:01:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=377, Unknown=1, NotChecked=0, Total=506 [2024-11-09 06:01:40,938 INFO L87 Difference]: Start difference. First operand 88 states and 101 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) [2024-11-09 06:01:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:41,448 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2024-11-09 06:01:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:01:41,449 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 [2024-11-09 06:01:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:41,450 INFO L225 Difference]: With dead ends: 87 [2024-11-09 06:01:41,450 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 06:01:41,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=128, Invalid=377, Unknown=1, NotChecked=0, Total=506 [2024-11-09 06:01:41,452 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 88 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:41,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 209 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:01:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 06:01:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 06:01:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 75 states have internal predecessors, (82), 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) [2024-11-09 06:01:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-11-09 06:01:41,463 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 16 [2024-11-09 06:01:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:41,464 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-11-09 06:01:41,464 INFO L472 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) [2024-11-09 06:01:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-11-09 06:01:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 06:01:41,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:41,465 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:41,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:01:41,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:41,666 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:41,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash 264928467, now seen corresponding path program 1 times [2024-11-09 06:01:41,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612233305] [2024-11-09 06:01:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 06:01:42,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:42,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612233305] [2024-11-09 06:01:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612233305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:42,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299027043] [2024-11-09 06:01:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:42,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:01:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:42,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:01:42,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:42,135 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 [2024-11-09 06:01:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:01:42,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 06:01:42,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299027043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:42,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616463820] [2024-11-09 06:01:42,830 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:01:42,830 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:42,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:01:42,831 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:01:42,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:43,886 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:01:43,888 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [616463820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:45,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:45,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 8, 5] total 24 [2024-11-09 06:01:45,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492624588] [2024-11-09 06:01:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:45,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:01:45,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:01:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:01:45,587 INFO L87 Difference]: Start difference. First operand 87 states and 100 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) [2024-11-09 06:01:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:46,689 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2024-11-09 06:01:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:01:46,689 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 [2024-11-09 06:01:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:46,691 INFO L225 Difference]: With dead ends: 86 [2024-11-09 06:01:46,691 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 06:01:46,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:01:46,693 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 86 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:46,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 311 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:01:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 06:01:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-09 06:01:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 74 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) [2024-11-09 06:01:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-09 06:01:46,710 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 17 [2024-11-09 06:01:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:46,710 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-09 06:01:46,711 INFO L472 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) [2024-11-09 06:01:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-09 06:01:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:01:46,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:46,712 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:46,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:01:46,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:46,913 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:46,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1285368972, now seen corresponding path program 1 times [2024-11-09 06:01:46,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:46,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539157378] [2024-11-09 06:01:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:46,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:47,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:47,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539157378] [2024-11-09 06:01:47,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539157378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:47,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:47,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:01:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979739764] [2024-11-09 06:01:47,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:47,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:01:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:01:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:01:47,186 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-09 06:01:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:47,330 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-09 06:01:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:01:47,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2024-11-09 06:01:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:47,332 INFO L225 Difference]: With dead ends: 84 [2024-11-09 06:01:47,332 INFO L226 Difference]: Without dead ends: 84 [2024-11-09 06:01:47,333 INFO L431 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 [2024-11-09 06:01:47,334 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:47,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 170 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:01:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-09 06:01:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-09 06:01:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.880952380952381) internal successors, (79), 72 states have internal predecessors, (79), 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) [2024-11-09 06:01:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-09 06:01:47,342 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 22 [2024-11-09 06:01:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:47,342 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-09 06:01:47,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-09 06:01:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-09 06:01:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:01:47,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:47,344 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:47,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:01:47,344 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:47,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1285368973, now seen corresponding path program 1 times [2024-11-09 06:01:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997435552] [2024-11-09 06:01:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:47,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:47,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997435552] [2024-11-09 06:01:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997435552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:47,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:01:47,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866944399] [2024-11-09 06:01:47,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:47,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:01:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:01:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:01:47,732 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-09 06:01:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:47,984 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2024-11-09 06:01:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:01:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 22 [2024-11-09 06:01:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:47,987 INFO L225 Difference]: With dead ends: 95 [2024-11-09 06:01:47,987 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 06:01:47,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:01:47,988 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:47,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 218 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:01:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 06:01:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2024-11-09 06:01:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 79 states have internal predecessors, (92), 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) [2024-11-09 06:01:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-11-09 06:01:47,998 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 22 [2024-11-09 06:01:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:47,998 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-11-09 06:01:47,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-09 06:01:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-11-09 06:01:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 06:01:47,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:47,999 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:48,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:01:48,000 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:48,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1191732479, now seen corresponding path program 1 times [2024-11-09 06:01:48,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786728099] [2024-11-09 06:01:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:48,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:48,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786728099] [2024-11-09 06:01:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786728099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:48,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:48,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:01:48,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295139789] [2024-11-09 06:01:48,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:48,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:01:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:01:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:01:48,805 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 9 states have internal predecessors, (13), 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) [2024-11-09 06:01:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:49,332 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2024-11-09 06:01:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:01:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 9 states have internal predecessors, (13), 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 23 [2024-11-09 06:01:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:49,334 INFO L225 Difference]: With dead ends: 106 [2024-11-09 06:01:49,334 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 06:01:49,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:01:49,335 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:49,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 337 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:01:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 06:01:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2024-11-09 06:01:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 53 states have (on average 1.849056603773585) internal successors, (98), 83 states have internal predecessors, (98), 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) [2024-11-09 06:01:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2024-11-09 06:01:49,352 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 23 [2024-11-09 06:01:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:49,352 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2024-11-09 06:01:49,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 9 states have internal predecessors, (13), 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) [2024-11-09 06:01:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2024-11-09 06:01:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:01:49,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:49,354 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:49,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:01:49,354 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:49,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1309366053, now seen corresponding path program 1 times [2024-11-09 06:01:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:49,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190302965] [2024-11-09 06:01:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:49,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190302965] [2024-11-09 06:01:49,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190302965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:49,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140700721] [2024-11-09 06:01:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:49,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:49,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:49,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:49,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:01:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:49,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:01:49,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:49,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:49,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140700721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:49,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644445887] [2024-11-09 06:01:49,883 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:01:49,884 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:49,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:01:49,885 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:01:49,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:50,659 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:01:50,661 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:52,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1644445887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:52,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:52,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 23 [2024-11-09 06:01:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075642494] [2024-11-09 06:01:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:52,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:01:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:01:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:01:52,466 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2024-11-09 06:01:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:53,613 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2024-11-09 06:01:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:01:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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 24 [2024-11-09 06:01:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:53,614 INFO L225 Difference]: With dead ends: 97 [2024-11-09 06:01:53,615 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 06:01:53,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:01:53,616 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:53,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 224 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:01:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 06:01:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2024-11-09 06:01:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 84 states have internal predecessors, (97), 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) [2024-11-09 06:01:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2024-11-09 06:01:53,623 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 24 [2024-11-09 06:01:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:53,624 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2024-11-09 06:01:53,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2024-11-09 06:01:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2024-11-09 06:01:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:01:53,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:53,625 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:53,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:01:53,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 06:01:53,830 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:53,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2030941286, now seen corresponding path program 1 times [2024-11-09 06:01:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:53,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870932718] [2024-11-09 06:01:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:53,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:53,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870932718] [2024-11-09 06:01:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870932718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566640209] [2024-11-09 06:01:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:53,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:53,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:53,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:53,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:01:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:54,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:01:54,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:54,057 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:01:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566640209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:54,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:01:54,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2024-11-09 06:01:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895374966] [2024-11-09 06:01:54,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:54,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:01:54,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:01:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:01:54,061 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2024-11-09 06:01:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:54,148 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2024-11-09 06:01:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:01:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2024-11-09 06:01:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:54,150 INFO L225 Difference]: With dead ends: 108 [2024-11-09 06:01:54,150 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 06:01:54,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:01:54,151 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 7 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:54,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 222 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:01:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 06:01:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-11-09 06:01:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 88 states have internal predecessors, (103), 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) [2024-11-09 06:01:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2024-11-09 06:01:54,167 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 26 [2024-11-09 06:01:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:54,168 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2024-11-09 06:01:54,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2024-11-09 06:01:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2024-11-09 06:01:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:01:54,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:54,169 INFO L215 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] [2024-11-09 06:01:54,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:01:54,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:54,370 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:54,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 702598292, now seen corresponding path program 1 times [2024-11-09 06:01:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095788804] [2024-11-09 06:01:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:54,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095788804] [2024-11-09 06:01:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095788804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:54,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:01:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777660348] [2024-11-09 06:01:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:54,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:01:54,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:01:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:01:54,463 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2024-11-09 06:01:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:54,545 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2024-11-09 06:01:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:01:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 [2024-11-09 06:01:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:54,547 INFO L225 Difference]: With dead ends: 100 [2024-11-09 06:01:54,547 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 06:01:54,547 INFO L431 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 [2024-11-09 06:01:54,548 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:54,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:01:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 06:01:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-11-09 06:01:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 87 states have internal predecessors, (102), 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) [2024-11-09 06:01:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-11-09 06:01:54,556 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 26 [2024-11-09 06:01:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:54,557 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-11-09 06:01:54,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2024-11-09 06:01:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-11-09 06:01:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:01:54,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:54,558 INFO L215 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] [2024-11-09 06:01:54,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:01:54,559 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:54,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash 702598293, now seen corresponding path program 1 times [2024-11-09 06:01:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203698457] [2024-11-09 06:01:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:01:54,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203698457] [2024-11-09 06:01:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203698457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:54,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:01:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562613379] [2024-11-09 06:01:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:54,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:01:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:01:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:01:54,698 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2024-11-09 06:01:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:54,775 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-11-09 06:01:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:01:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 [2024-11-09 06:01:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:54,777 INFO L225 Difference]: With dead ends: 99 [2024-11-09 06:01:54,777 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 06:01:54,777 INFO L431 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 [2024-11-09 06:01:54,778 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:54,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:01:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 06:01:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2024-11-09 06:01:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 86 states have internal predecessors, (101), 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) [2024-11-09 06:01:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2024-11-09 06:01:54,785 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 26 [2024-11-09 06:01:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:54,785 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2024-11-09 06:01:54,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2024-11-09 06:01:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2024-11-09 06:01:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:01:54,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:54,787 INFO L215 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] [2024-11-09 06:01:54,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:01:54,787 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:54,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2073911692, now seen corresponding path program 1 times [2024-11-09 06:01:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406833711] [2024-11-09 06:01:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:55,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406833711] [2024-11-09 06:01:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406833711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:55,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:01:55,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 06:01:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179939811] [2024-11-09 06:01:55,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:55,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:01:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:01:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:01:55,474 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-11-09 06:01:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:55,952 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-11-09 06:01:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:01:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 9 states have internal predecessors, (17), 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 28 [2024-11-09 06:01:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:55,954 INFO L225 Difference]: With dead ends: 100 [2024-11-09 06:01:55,954 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 06:01:55,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-09 06:01:55,955 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:55,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 482 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:01:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 06:01:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-09 06:01:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 86 states have internal predecessors, (98), 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) [2024-11-09 06:01:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2024-11-09 06:01:55,962 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 28 [2024-11-09 06:01:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:55,963 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2024-11-09 06:01:55,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-11-09 06:01:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2024-11-09 06:01:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:01:55,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:55,968 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:55,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:01:55,969 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:01:55,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 894945699, now seen corresponding path program 1 times [2024-11-09 06:01:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897268033] [2024-11-09 06:01:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:55,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:01:56,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897268033] [2024-11-09 06:01:56,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897268033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125050348] [2024-11-09 06:01:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:56,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:56,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:01:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:56,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 06:01:56,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:56,709 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 10 treesize of output 9 [2024-11-09 06:01:56,723 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 [2024-11-09 06:01:57,510 INFO L349 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2024-11-09 06:01:57,511 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 [2024-11-09 06:01:57,744 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 32 [2024-11-09 06:01:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:01:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:01:57,761 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 39 treesize of output 25 [2024-11-09 06:01:57,818 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:01:57,819 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 [2024-11-09 06:01:57,836 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 32 [2024-11-09 06:01:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:01:57,852 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 34 treesize of output 25 [2024-11-09 06:01:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:01:57,862 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 [2024-11-09 06:01:59,020 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 198 treesize of output 182 [2024-11-09 06:02:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:02:00,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:00,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:02:00,912 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 45 treesize of output 63 [2024-11-09 06:02:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125050348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:03,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202585545] [2024-11-09 06:02:03,533 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:02:03,533 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:03,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:03,534 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:03,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:05,291 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:02:05,293 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:02:10,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2841#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_finddup_~a#1.base_15| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_finddup_~a#1.base_15|) 0) |ULTIMATE.start_finddup_#t~mem8#1|) (<= 4 (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_15|)) (= (select |#valid| |v_ULTIMATE.start_finddup_~a#1.base_15|) 1))) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 2 |ULTIMATE.start_finddup_~n#1|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |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|) (<= 2 |ULTIMATE.start_finddup_~_i#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2024-11-09 06:02:10,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:02:10,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:02:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2024-11-09 06:02:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454575262] [2024-11-09 06:02:10,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:10,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:02:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:02:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1994, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 06:02:10,839 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 22 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 06:02:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:14,894 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2024-11-09 06:02:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:02:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2024-11-09 06:02:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:14,896 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:02:14,896 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 06:02:14,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=402, Invalid=2789, Unknown=1, NotChecked=0, Total=3192 [2024-11-09 06:02:14,898 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 152 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:14,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 460 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 06:02:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 06:02:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2024-11-09 06:02:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.7727272727272727) internal successors, (117), 94 states have internal predecessors, (117), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:02:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2024-11-09 06:02:14,906 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 28 [2024-11-09 06:02:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:14,907 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2024-11-09 06:02:14,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 06:02:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2024-11-09 06:02:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 06:02:14,908 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:14,908 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:14,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:02:15,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:02:15,113 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:15,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash -223041667, now seen corresponding path program 1 times [2024-11-09 06:02:15,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:15,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129296004] [2024-11-09 06:02:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:15,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:15,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129296004] [2024-11-09 06:02:15,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129296004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:15,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:02:15,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:02:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935003899] [2024-11-09 06:02:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:15,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:02:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:02:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:02:15,207 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-09 06:02:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:15,308 INFO L93 Difference]: Finished difference Result 177 states and 228 transitions. [2024-11-09 06:02:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:02:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 31 [2024-11-09 06:02:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:15,310 INFO L225 Difference]: With dead ends: 177 [2024-11-09 06:02:15,311 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 06:02:15,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:02:15,313 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 48 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:15,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 573 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:02:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 06:02:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 116. [2024-11-09 06:02:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 99 states have internal predecessors, (121), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2024-11-09 06:02:15,323 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 31 [2024-11-09 06:02:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:15,326 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2024-11-09 06:02:15,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-09 06:02:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2024-11-09 06:02:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 06:02:15,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:15,328 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:15,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 06:02:15,329 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:15,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash -501326526, now seen corresponding path program 1 times [2024-11-09 06:02:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111443331] [2024-11-09 06:02:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:15,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:15,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:15,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111443331] [2024-11-09 06:02:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111443331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354870680] [2024-11-09 06:02:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:15,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:15,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:15,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:02:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:15,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:02:15,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:15,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:15,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354870680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278453092] [2024-11-09 06:02:15,662 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:02:15,662 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:15,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:15,664 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:15,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:18,354 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:02:18,356 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:02:22,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3616#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (= |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_finddup_~_i#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2024-11-09 06:02:22,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:02:22,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:02:22,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-09 06:02:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616327579] [2024-11-09 06:02:22,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:22,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:02:22,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:02:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:02:22,144 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-09 06:02:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:22,272 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2024-11-09 06:02:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:02:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 31 [2024-11-09 06:02:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:22,278 INFO L225 Difference]: With dead ends: 145 [2024-11-09 06:02:22,278 INFO L226 Difference]: Without dead ends: 145 [2024-11-09 06:02:22,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:02:22,279 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:22,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 353 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:02:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-09 06:02:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2024-11-09 06:02:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.7142857142857142) internal successors, (144), 113 states have internal predecessors, (144), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2024-11-09 06:02:22,287 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 31 [2024-11-09 06:02:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:22,287 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2024-11-09 06:02:22,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-09 06:02:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2024-11-09 06:02:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:02:22,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:22,289 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:22,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:22,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:02:22,489 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:22,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -336822192, now seen corresponding path program 1 times [2024-11-09 06:02:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:22,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573003283] [2024-11-09 06:02:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:22,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573003283] [2024-11-09 06:02:22,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573003283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805296354] [2024-11-09 06:02:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:22,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:22,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:22,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:02:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:22,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:02:22,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:22,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:22,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805296354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281019670] [2024-11-09 06:02:22,751 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:02:22,752 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:22,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:22,753 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:22,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:25,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2024-11-09 06:02:25,459 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:02:25,462 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:02:30,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4108#(and (= |__VERIFIER_assert_#in~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_~n#1_21| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_16| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_17| Int) (|v_ULTIMATE.start_finddup_~i~1#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_55| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_13| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_80| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_12| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_16| Int)) (and (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_13|) (<= 1 |#StackHeapBarrier|) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_12|) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_1| 0) (= |v_ULTIMATE.start_finddup_~a#1.offset_16| 0) (<= |v_ULTIMATE.start_finddup_~n#1_21| |v_ULTIMATE.start_finddup_~i~1#1_46|) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_80| 1073741823) (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_1|) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_1|) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_17|) (<= 1 |v_ULTIMATE.start_finddup_~i~1#1_46|) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_1| 0) (<= |v_ULTIMATE.start_finddup_~n#1_21| 1073741823) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_55| 0) (= |v_ULTIMATE.start_finddup_~_j#1.offset_16| 0))))' at error location [2024-11-09 06:02:30,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:02:30,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:02:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-09 06:02:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267727101] [2024-11-09 06:02:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:30,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:02:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:02:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:02:30,365 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-09 06:02:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:30,458 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2024-11-09 06:02:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:02:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 33 [2024-11-09 06:02:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:30,459 INFO L225 Difference]: With dead ends: 132 [2024-11-09 06:02:30,459 INFO L226 Difference]: Without dead ends: 130 [2024-11-09 06:02:30,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:02:30,461 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 14 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:30,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 274 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:02:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-09 06:02:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-09 06:02:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.6547619047619047) internal successors, (139), 113 states have internal predecessors, (139), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2024-11-09 06:02:30,467 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 33 [2024-11-09 06:02:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:30,468 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2024-11-09 06:02:30,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-09 06:02:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2024-11-09 06:02:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:02:30,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:30,469 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:30,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:30,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:02:30,670 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:30,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash 405513282, now seen corresponding path program 1 times [2024-11-09 06:02:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124559752] [2024-11-09 06:02:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:30,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124559752] [2024-11-09 06:02:30,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124559752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:30,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:02:30,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:02:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416933903] [2024-11-09 06:02:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:30,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:02:30,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:30,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:02:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:02:30,738 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:02:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:30,866 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2024-11-09 06:02:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:02:30,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-09 06:02:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:30,867 INFO L225 Difference]: With dead ends: 125 [2024-11-09 06:02:30,868 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 06:02:30,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:02:30,869 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:30,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:02:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 06:02:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-09 06:02:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 84 states have (on average 1.5714285714285714) internal successors, (132), 108 states have internal predecessors, (132), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 158 transitions. [2024-11-09 06:02:30,879 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 158 transitions. Word has length 33 [2024-11-09 06:02:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:30,879 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 158 transitions. [2024-11-09 06:02:30,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:02:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 158 transitions. [2024-11-09 06:02:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:02:30,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:30,882 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:30,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 06:02:30,882 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:30,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 405513283, now seen corresponding path program 1 times [2024-11-09 06:02:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101866346] [2024-11-09 06:02:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:31,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101866346] [2024-11-09 06:02:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101866346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:31,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:02:31,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:02:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080757391] [2024-11-09 06:02:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:31,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:02:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:02:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:02:31,017 INFO L87 Difference]: Start difference. First operand 125 states and 158 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:02:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:31,142 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2024-11-09 06:02:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:02:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-09 06:02:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:31,144 INFO L225 Difference]: With dead ends: 120 [2024-11-09 06:02:31,144 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 06:02:31,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:02:31,145 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 42 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:31,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 127 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:02:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 06:02:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2024-11-09 06:02:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 102 states have internal predecessors, (124), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2024-11-09 06:02:31,158 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 33 [2024-11-09 06:02:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:31,158 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2024-11-09 06:02:31,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:02:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2024-11-09 06:02:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 06:02:31,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:31,160 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:31,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 06:02:31,161 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:31,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -955796631, now seen corresponding path program 2 times [2024-11-09 06:02:31,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:31,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581040479] [2024-11-09 06:02:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:31,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:02:32,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581040479] [2024-11-09 06:02:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581040479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174762714] [2024-11-09 06:02:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:02:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:32,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:32,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:02:32,483 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:02:32,484 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:32,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 06:02:32,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:32,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 06:02:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:02:32,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2024-11-09 06:02:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:02:33,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:02:33,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2024-11-09 06:02:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:02:34,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:34,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:02:34,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 503 treesize of output 435 [2024-11-09 06:02:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:02:47,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174762714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:47,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249578926] [2024-11-09 06:02:47,587 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:02:47,588 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:47,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:47,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:47,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:49,887 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2024-11-09 06:02:50,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:02:50,067 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:02:57,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5149#(and (= |__VERIFIER_assert_#in~cond#1| 0) (exists ((|v_ULTIMATE.start_finddup_~i~1#1_63| Int) (|v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_finddup_~n#1_25| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_finddup_~_i#1.base_16| Int) (|v_ULTIMATE.start_finddup_~_j#1.base_20| Int) (|v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_finddup_~a#1.offset_19| Int) (|v_ULTIMATE.start_finddup_~_j#1.offset_19| Int) (|v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_finddup_~_i#1.offset_15| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#i~2#1.base_BEFORE_CALL_2|) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_finddup_~n#1_25| |v_ULTIMATE.start_finddup_~i~1#1_63|) (= |v_ULTIMATE.start_finddup_~_j#1.offset_19| 0) (= |v_ULTIMATE.start_finddup_~a#1.offset_19| 0) (= |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_71| 0) (<= 1 |v_ULTIMATE.start_finddup_~i~1#1_63|) (<= 2 |v_ULTIMATE.start_finddup_~_j#1.base_20|) (= |v_ULTIMATE.start_main_~#i~2#1.offset_BEFORE_CALL_2| 0) (<= 2 |v_ULTIMATE.start_main_~#j~2#1.base_BEFORE_CALL_2|) (<= 2 |v_ULTIMATE.start_finddup_~_i#1.base_16|) (= 0 |v_ULTIMATE.start_finddup_~_i#1.offset_15|) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_99| 1073741823) (= |v_ULTIMATE.start_main_~#j~2#1.offset_BEFORE_CALL_2| 0) (<= |v_ULTIMATE.start_finddup_~n#1_25| 1073741823))))' at error location [2024-11-09 06:02:57,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:02:57,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:02:57,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 36 [2024-11-09 06:02:57,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865221749] [2024-11-09 06:02:57,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:57,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:02:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:02:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:02:57,155 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 32 states have internal predecessors, (61), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-09 06:02:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:59,256 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2024-11-09 06:02:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:02:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 32 states have internal predecessors, (61), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 37 [2024-11-09 06:02:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:59,257 INFO L225 Difference]: With dead ends: 164 [2024-11-09 06:02:59,257 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 06:02:59,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=429, Invalid=4263, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:02:59,260 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:59,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1247 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:02:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 06:02:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 123. [2024-11-09 06:02:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.4597701149425288) internal successors, (127), 106 states have internal predecessors, (127), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:02:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2024-11-09 06:02:59,266 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 37 [2024-11-09 06:02:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:59,267 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2024-11-09 06:02:59,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 32 states have internal predecessors, (61), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-09 06:02:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2024-11-09 06:02:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:02:59,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:59,268 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:59,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:59,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:59,469 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:02:59,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash -928981530, now seen corresponding path program 2 times [2024-11-09 06:02:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:59,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362288724] [2024-11-09 06:02:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:59,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:02:59,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362288724] [2024-11-09 06:02:59,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362288724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473112513] [2024-11-09 06:02:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:02:59,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:59,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:59,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:59,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:02:59,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:02:59,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:59,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:02:59,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:00,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:00,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:03:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473112513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276901209] [2024-11-09 06:03:00,395 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:03:00,395 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:00,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:00,395 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:00,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:02,424 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:03:02,425 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:06,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5712#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_finddup_~_i#1.offset| 0) (= |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_finddup_~_i#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2024-11-09 06:03:06,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:06,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-11-09 06:03:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138715282] [2024-11-09 06:03:06,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:06,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:03:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:03:06,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:03:06,550 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:03:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:07,384 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2024-11-09 06:03:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:03:07,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 36 [2024-11-09 06:03:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:07,386 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:03:07,386 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 06:03:07,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=479, Invalid=2491, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:03:07,388 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 208 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:07,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 460 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:03:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 06:03:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2024-11-09 06:03:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 94 states have internal predecessors, (106), 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) [2024-11-09 06:03:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2024-11-09 06:03:07,394 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 36 [2024-11-09 06:03:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:07,394 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2024-11-09 06:03:07,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:03:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2024-11-09 06:03:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 06:03:07,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:07,396 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:07,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:07,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:07,601 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:07,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1191847954, now seen corresponding path program 1 times [2024-11-09 06:03:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776793480] [2024-11-09 06:03:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:07,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:07,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776793480] [2024-11-09 06:03:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776793480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:07,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:07,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 06:03:07,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872790870] [2024-11-09 06:03:07,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:07,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:03:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:03:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:03:07,936 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:03:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:08,239 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2024-11-09 06:03:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:03:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-09 06:03:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:08,241 INFO L225 Difference]: With dead ends: 133 [2024-11-09 06:03:08,241 INFO L226 Difference]: Without dead ends: 133 [2024-11-09 06:03:08,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:03:08,242 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:08,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 454 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:03:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-09 06:03:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2024-11-09 06:03:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.353658536585366) internal successors, (111), 99 states have internal predecessors, (111), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 06:03:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2024-11-09 06:03:08,248 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 38 [2024-11-09 06:03:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:08,249 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2024-11-09 06:03:08,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:03:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2024-11-09 06:03:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 06:03:08,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:08,250 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:08,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 06:03:08,250 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:08,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1266343622, now seen corresponding path program 1 times [2024-11-09 06:03:08,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:08,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781015287] [2024-11-09 06:03:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:08,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:08,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781015287] [2024-11-09 06:03:08,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781015287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:08,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950447458] [2024-11-09 06:03:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:08,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:08,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:08,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:08,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:03:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:08,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:03:08,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:08,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:09,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:03:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:09,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950447458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248218492] [2024-11-09 06:03:09,228 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:03:09,229 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:09,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:09,230 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:09,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:11,034 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:03:11,035 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:15,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6508#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#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|) (exists ((|v_ULTIMATE.start_finddup_~j~1#1_126| Int) (|v_ULTIMATE.start_finddup_~a#1.base_25| Int)) (and (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_25|)) (or (< |v_ULTIMATE.start_finddup_~j~1#1_126| 0) (< (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_25|) (+ 4 (* |v_ULTIMATE.start_finddup_~j~1#1_126| 4)))) (= (select (select |#memory_int| |v_ULTIMATE.start_finddup_~a#1.base_25|) (* |ULTIMATE.start_finddup_~i~1#1| 4)) |ULTIMATE.start_finddup_#t~mem8#1|) (= (select |#valid| |v_ULTIMATE.start_finddup_~a#1.base_25|) 1))) (= |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_finddup_~_i#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2024-11-09 06:03:15,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:15,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:15,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-09 06:03:15,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898695565] [2024-11-09 06:03:15,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:15,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:03:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:03:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:03:15,288 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:03:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:16,099 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2024-11-09 06:03:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:03:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2024-11-09 06:03:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:16,101 INFO L225 Difference]: With dead ends: 123 [2024-11-09 06:03:16,101 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 06:03:16,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=507, Invalid=2799, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:03:16,103 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 134 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:16,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 423 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:03:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 06:03:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2024-11-09 06:03:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 99 states have internal predecessors, (110), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 06:03:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2024-11-09 06:03:16,116 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 37 [2024-11-09 06:03:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:16,117 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2024-11-09 06:03:16,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:03:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2024-11-09 06:03:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:03:16,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:16,118 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:16,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:16,318 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:16,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1870229677, now seen corresponding path program 1 times [2024-11-09 06:03:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:16,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875629065] [2024-11-09 06:03:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:16,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:16,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875629065] [2024-11-09 06:03:16,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875629065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:16,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515996684] [2024-11-09 06:03:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:16,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:16,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:16,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:03:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:17,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 06:03:17,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:17,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:03:17,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 06:03:17,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 06:03:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:17,385 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:03:17,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515996684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:17,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:03:17,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2024-11-09 06:03:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663948124] [2024-11-09 06:03:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:17,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:03:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:03:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2024-11-09 06:03:17,387 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:03:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:17,773 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-11-09 06:03:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:03:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-09 06:03:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:17,777 INFO L225 Difference]: With dead ends: 141 [2024-11-09 06:03:17,777 INFO L226 Difference]: Without dead ends: 141 [2024-11-09 06:03:17,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:03:17,778 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 35 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:17,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 494 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:03:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-09 06:03:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2024-11-09 06:03:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 105 states have internal predecessors, (116), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:03:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-11-09 06:03:17,785 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 39 [2024-11-09 06:03:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:17,786 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-11-09 06:03:17,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:03:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-11-09 06:03:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 06:03:17,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:17,787 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:17,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:03:17,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 06:03:17,992 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:17,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1690636817, now seen corresponding path program 1 times [2024-11-09 06:03:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348186621] [2024-11-09 06:03:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:18,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:18,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348186621] [2024-11-09 06:03:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348186621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:18,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:18,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:03:18,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570565] [2024-11-09 06:03:18,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:18,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:03:18,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:03:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:03:18,070 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:18,181 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2024-11-09 06:03:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:03:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-11-09 06:03:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:18,182 INFO L225 Difference]: With dead ends: 118 [2024-11-09 06:03:18,183 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 06:03:18,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:03:18,183 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:18,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 94 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 06:03:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-09 06:03:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 88 states have (on average 1.2727272727272727) internal successors, (112), 101 states have internal predecessors, (112), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:03:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2024-11-09 06:03:18,189 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 42 [2024-11-09 06:03:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:18,190 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2024-11-09 06:03:18,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2024-11-09 06:03:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 06:03:18,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:18,191 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:18,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 06:03:18,191 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:18,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1690636816, now seen corresponding path program 1 times [2024-11-09 06:03:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:18,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706958529] [2024-11-09 06:03:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:18,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706958529] [2024-11-09 06:03:18,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706958529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:18,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:18,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:03:18,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2852447] [2024-11-09 06:03:18,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:18,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:03:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:03:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:03:18,294 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:18,356 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2024-11-09 06:03:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:03:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-11-09 06:03:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:18,358 INFO L225 Difference]: With dead ends: 114 [2024-11-09 06:03:18,358 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 06:03:18,358 INFO L431 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 [2024-11-09 06:03:18,359 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:18,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 06:03:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-09 06:03:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 97 states have internal predecessors, (108), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:03:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2024-11-09 06:03:18,368 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 42 [2024-11-09 06:03:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:18,368 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2024-11-09 06:03:18,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2024-11-09 06:03:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 06:03:18,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:18,372 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:18,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 06:03:18,373 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:18,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash -165850052, now seen corresponding path program 2 times [2024-11-09 06:03:18,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:18,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324682036] [2024-11-09 06:03:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:18,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324682036] [2024-11-09 06:03:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324682036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426152540] [2024-11-09 06:03:18,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:03:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:18,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:18,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:03:18,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:03:18,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:18,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:03:18,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:18,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:19,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426152540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894545265] [2024-11-09 06:03:19,268 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:03:19,268 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:19,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:19,268 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:19,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:21,103 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:03:21,105 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:25,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7944#(and (<= 2 |ULTIMATE.start_main_~#j~2#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#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_main_~#j~2#1.offset| 0) (= |ULTIMATE.start_finddup_~_j#1.offset| 0) (exists ((|v_ULTIMATE.start_finddup_~j~1#1_146| Int) (|v_ULTIMATE.start_finddup_~a#1.base_26| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_finddup_~a#1.base_26|) (* |ULTIMATE.start_finddup_~i~1#1| 4)) |ULTIMATE.start_finddup_#t~mem8#1|) (= (select |#valid| |v_ULTIMATE.start_finddup_~a#1.base_26|) 1) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_26|)) (or (< |v_ULTIMATE.start_finddup_~j~1#1_146| 0) (< (select |#length| |v_ULTIMATE.start_finddup_~a#1.base_26|) (+ (* |v_ULTIMATE.start_finddup_~j~1#1_146| 4) 4))))) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_i#1.base|) (<= |ULTIMATE.start_finddup_~n#1| 1073741823) (<= 2 |ULTIMATE.start_finddup_~_j#1.base|) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2024-11-09 06:03:25,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:25,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:25,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-09 06:03:25,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270719224] [2024-11-09 06:03:25,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:25,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:03:25,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:03:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:03:25,657 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2024-11-09 06:03:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:26,803 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2024-11-09 06:03:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 06:03:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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 42 [2024-11-09 06:03:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:26,805 INFO L225 Difference]: With dead ends: 152 [2024-11-09 06:03:26,805 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 06:03:26,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=620, Invalid=3936, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 06:03:26,807 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 127 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:26,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 434 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:03:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 06:03:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2024-11-09 06:03:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 119 states have internal predecessors, (137), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:03:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2024-11-09 06:03:26,817 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 42 [2024-11-09 06:03:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:26,818 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2024-11-09 06:03:26,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2024-11-09 06:03:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2024-11-09 06:03:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 06:03:26,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:26,819 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:26,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:27,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:03:27,021 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:27,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash -116767936, now seen corresponding path program 1 times [2024-11-09 06:03:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:27,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868682654] [2024-11-09 06:03:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:27,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:27,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868682654] [2024-11-09 06:03:27,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868682654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:27,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:27,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 06:03:27,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78494395] [2024-11-09 06:03:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:27,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:03:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:03:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:03:27,224 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:27,388 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2024-11-09 06:03:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:03:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-11-09 06:03:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:27,390 INFO L225 Difference]: With dead ends: 153 [2024-11-09 06:03:27,390 INFO L226 Difference]: Without dead ends: 153 [2024-11-09 06:03:27,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:03:27,391 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:27,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-09 06:03:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2024-11-09 06:03:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 123 states have internal predecessors, (141), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 06:03:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2024-11-09 06:03:27,398 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 47 [2024-11-09 06:03:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:27,398 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2024-11-09 06:03:27,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2024-11-09 06:03:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 06:03:27,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:27,400 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:27,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-09 06:03:27,400 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:27,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash 513333796, now seen corresponding path program 1 times [2024-11-09 06:03:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:27,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492284758] [2024-11-09 06:03:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:27,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:27,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492284758] [2024-11-09 06:03:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492284758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:27,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:27,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:03:27,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190451746] [2024-11-09 06:03:27,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:27,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:03:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:03:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:03:27,643 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:27,905 INFO L93 Difference]: Finished difference Result 163 states and 193 transitions. [2024-11-09 06:03:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:03:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-11-09 06:03:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:27,907 INFO L225 Difference]: With dead ends: 163 [2024-11-09 06:03:27,907 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 06:03:27,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:03:27,908 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 23 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:27,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 387 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:03:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 06:03:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2024-11-09 06:03:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.221311475409836) internal successors, (149), 131 states have internal predecessors, (149), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 06:03:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2024-11-09 06:03:27,916 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 48 [2024-11-09 06:03:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:27,916 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2024-11-09 06:03:27,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 06:03:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2024-11-09 06:03:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 06:03:27,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:27,918 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:27,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-09 06:03:27,918 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:27,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1430125328, now seen corresponding path program 3 times [2024-11-09 06:03:27,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:27,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758291492] [2024-11-09 06:03:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 06:03:31,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:31,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758291492] [2024-11-09 06:03:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758291492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:31,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939415891] [2024-11-09 06:03:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:03:31,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:31,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:31,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:03:31,159 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:03:31,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:31,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 06:03:31,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:31,175 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 [2024-11-09 06:03:31,713 INFO L349 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2024-11-09 06:03:31,713 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 [2024-11-09 06:03:31,828 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 32 [2024-11-09 06:03:34,041 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 67 treesize of output 49 [2024-11-09 06:03:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 06:03:34,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939415891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618499893] [2024-11-09 06:03:35,831 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:03:35,831 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:35,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:35,832 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:35,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:37,248 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:03:37,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:03:37,252 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:41,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9258#(= |__VERIFIER_assert_#in~cond#1| 0)' at error location [2024-11-09 06:03:41,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:41,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:03:41,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2024-11-09 06:03:41,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180527720] [2024-11-09 06:03:41,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:41,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 06:03:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:41,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 06:03:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4322, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:03:41,374 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 37 states, 34 states have (on average 1.911764705882353) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 06:03:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:48,670 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2024-11-09 06:03:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:03:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.911764705882353) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2024-11-09 06:03:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:48,673 INFO L225 Difference]: With dead ends: 161 [2024-11-09 06:03:48,673 INFO L226 Difference]: Without dead ends: 160 [2024-11-09 06:03:48,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=843, Invalid=8469, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 06:03:48,677 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 186 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:48,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 757 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:03:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-09 06:03:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2024-11-09 06:03:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 116 states have (on average 1.1896551724137931) internal successors, (138), 125 states have internal predecessors, (138), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 06:03:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2024-11-09 06:03:48,683 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 51 [2024-11-09 06:03:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:48,684 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2024-11-09 06:03:48,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.911764705882353) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 06:03:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2024-11-09 06:03:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 06:03:48,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:48,685 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:48,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:03:48,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:03:48,887 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:03:48,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -627439765, now seen corresponding path program 1 times [2024-11-09 06:03:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:48,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18002683] [2024-11-09 06:03:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:48,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:03:49,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:49,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18002683] [2024-11-09 06:03:49,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18002683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:49,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197645766] [2024-11-09 06:03:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:49,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:49,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:49,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:49,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:03:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:49,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 06:03:49,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:49,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:03:49,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 06:03:49,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 06:03:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:03:49,787 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:03:49,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197645766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:49,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:03:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 14 [2024-11-09 06:03:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940483724] [2024-11-09 06:03:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:49,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:03:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:03:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:03:49,789 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:03:51,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:03:53,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:03:55,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:03:57,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:03:59,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:04:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:00,090 INFO L93 Difference]: Finished difference Result 187 states and 207 transitions. [2024-11-09 06:04:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:04:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-11-09 06:04:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:00,092 INFO L225 Difference]: With dead ends: 187 [2024-11-09 06:04:00,092 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 06:04:00,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:04:00,093 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 37 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:00,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 444 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 5 Unknown, 0 Unchecked, 10.3s Time] [2024-11-09 06:04:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 06:04:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 173. [2024-11-09 06:04:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 147 states have internal predecessors, (163), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 06:04:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2024-11-09 06:04:00,106 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 52 [2024-11-09 06:04:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:00,106 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2024-11-09 06:04:00,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:04:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2024-11-09 06:04:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 06:04:00,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:00,107 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:00,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:04:00,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:04:00,313 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:04:00,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -888601907, now seen corresponding path program 1 times [2024-11-09 06:04:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416193990] [2024-11-09 06:04:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:04:00,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:00,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416193990] [2024-11-09 06:04:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416193990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892837435] [2024-11-09 06:04:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:00,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:00,881 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:04:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:01,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 06:04:01,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:01,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:04:01,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 06:04:01,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 06:04:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:04:02,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:02,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:04:02,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2024-11-09 06:04:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:04:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892837435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:03,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973115871] [2024-11-09 06:04:03,716 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-09 06:04:03,716 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:03,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:03,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:03,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:04:05,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:04:05,454 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:04:05,455 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:04:21,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10527#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond#1| 0))' at error location [2024-11-09 06:04:21,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:04:21,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:04:21,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2024-11-09 06:04:21,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647055780] [2024-11-09 06:04:21,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:04:21,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:04:21,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:04:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2987, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:04:21,660 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 30 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 06:04:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:22,908 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2024-11-09 06:04:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:04:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 30 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 56 [2024-11-09 06:04:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:22,911 INFO L225 Difference]: With dead ends: 277 [2024-11-09 06:04:22,911 INFO L226 Difference]: Without dead ends: 277 [2024-11-09 06:04:22,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 105 SyntacticMatches, 20 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=405, Invalid=3885, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:04:22,913 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:22,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 636 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:04:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-09 06:04:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 259. [2024-11-09 06:04:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 202 states have (on average 1.1584158415841583) internal successors, (234), 216 states have internal predecessors, (234), 32 states have call successors, (32), 17 states have call predecessors, (32), 17 states have return successors, (32), 25 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 06:04:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 298 transitions. [2024-11-09 06:04:22,923 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 298 transitions. Word has length 56 [2024-11-09 06:04:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:22,924 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 298 transitions. [2024-11-09 06:04:22,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 30 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 06:04:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 298 transitions. [2024-11-09 06:04:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 06:04:22,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:22,927 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:22,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:04:23,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:23,131 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:04:23,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1357718838, now seen corresponding path program 1 times [2024-11-09 06:04:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:23,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064751129] [2024-11-09 06:04:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:04:23,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:23,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064751129] [2024-11-09 06:04:23,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064751129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:23,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:23,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:04:23,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354854278] [2024-11-09 06:04:23,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:23,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:04:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:23,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:04:23,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:04:23,235 INFO L87 Difference]: Start difference. First operand 259 states and 298 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:04:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:23,378 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2024-11-09 06:04:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:04:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2024-11-09 06:04:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:23,381 INFO L225 Difference]: With dead ends: 256 [2024-11-09 06:04:23,381 INFO L226 Difference]: Without dead ends: 256 [2024-11-09 06:04:23,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:04:23,382 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:23,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 83 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-09 06:04:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2024-11-09 06:04:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 202 states have (on average 1.1237623762376239) internal successors, (227), 213 states have internal predecessors, (227), 32 states have call successors, (32), 17 states have call predecessors, (32), 17 states have return successors, (32), 25 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 06:04:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 291 transitions. [2024-11-09 06:04:23,392 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 291 transitions. Word has length 60 [2024-11-09 06:04:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:23,392 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 291 transitions. [2024-11-09 06:04:23,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:04:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 291 transitions. [2024-11-09 06:04:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 06:04:23,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:23,394 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:23,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-09 06:04:23,395 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:04:23,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1357718839, now seen corresponding path program 1 times [2024-11-09 06:04:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:23,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794338370] [2024-11-09 06:04:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 06:04:24,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:24,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794338370] [2024-11-09 06:04:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794338370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044291597] [2024-11-09 06:04:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:24,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:24,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:24,204 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:24,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:04:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:24,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 06:04:24,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:24,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:04:24,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 06:04:24,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2024-11-09 06:04:25,446 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 29 treesize of output 17 [2024-11-09 06:04:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:04:25,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044291597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:25,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 23 [2024-11-09 06:04:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244549255] [2024-11-09 06:04:25,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:25,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:04:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:04:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:04:25,486 INFO L87 Difference]: Start difference. First operand 256 states and 291 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 06:04:27,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:04:29,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:04:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:29,886 INFO L93 Difference]: Finished difference Result 284 states and 316 transitions. [2024-11-09 06:04:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:04:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2024-11-09 06:04:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:29,889 INFO L225 Difference]: With dead ends: 284 [2024-11-09 06:04:29,889 INFO L226 Difference]: Without dead ends: 284 [2024-11-09 06:04:29,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:04:29,892 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:29,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 180 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2024-11-09 06:04:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-09 06:04:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2024-11-09 06:04:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 216 states have (on average 1.1157407407407407) internal successors, (241), 227 states have internal predecessors, (241), 34 states have call successors, (34), 19 states have call predecessors, (34), 19 states have return successors, (34), 27 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-09 06:04:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 309 transitions. [2024-11-09 06:04:29,923 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 309 transitions. Word has length 60 [2024-11-09 06:04:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:29,924 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 309 transitions. [2024-11-09 06:04:29,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 06:04:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 309 transitions. [2024-11-09 06:04:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 06:04:29,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:29,926 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:29,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:04:30,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:30,130 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:04:30,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:30,131 INFO L85 PathProgramCache]: Analyzing trace with hash -580020217, now seen corresponding path program 1 times [2024-11-09 06:04:30,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:30,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963648811] [2024-11-09 06:04:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:30,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:04:30,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963648811] [2024-11-09 06:04:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963648811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728715412] [2024-11-09 06:04:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:30,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:30,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:30,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:04:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:30,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:04:30,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:30,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 06:04:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:04:30,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:30,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-11-09 06:04:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:04:31,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728715412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215447650] [2024-11-09 06:04:31,129 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 06:04:31,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:31,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:31,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:31,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:04:33,196 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:04:33,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:04:33,202 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:06,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12762#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond#1| 0))' at error location [2024-11-09 06:05:06,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:06,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:06,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-11-09 06:05:06,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055297107] [2024-11-09 06:05:06,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:06,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:05:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:05:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1782, Unknown=13, NotChecked=0, Total=1980 [2024-11-09 06:05:06,928 INFO L87 Difference]: Start difference. First operand 274 states and 309 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 06:05:08,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:10,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:12,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:15,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:17,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:19,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:05:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:19,432 INFO L93 Difference]: Finished difference Result 282 states and 310 transitions. [2024-11-09 06:05:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:05:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2024-11-09 06:05:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:19,434 INFO L225 Difference]: With dead ends: 282 [2024-11-09 06:05:19,435 INFO L226 Difference]: Without dead ends: 282 [2024-11-09 06:05:19,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=211, Invalid=2128, Unknown=13, NotChecked=0, Total=2352 [2024-11-09 06:05:19,436 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 56 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:19,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 433 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 398 Invalid, 6 Unknown, 0 Unchecked, 12.4s Time] [2024-11-09 06:05:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-09 06:05:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 212. [2024-11-09 06:05:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 177 states have internal predecessors, (191), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 06:05:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 237 transitions. [2024-11-09 06:05:19,445 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 237 transitions. Word has length 61 [2024-11-09 06:05:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:19,445 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 237 transitions. [2024-11-09 06:05:19,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 06:05:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 237 transitions. [2024-11-09 06:05:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 06:05:19,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:19,447 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:19,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:05:19,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:19,649 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:05:19,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:19,650 INFO L85 PathProgramCache]: Analyzing trace with hash -902252038, now seen corresponding path program 1 times [2024-11-09 06:05:19,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:19,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848297396] [2024-11-09 06:05:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:19,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:05:20,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848297396] [2024-11-09 06:05:20,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848297396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:20,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:20,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:05:20,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792548392] [2024-11-09 06:05:20,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:20,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:05:20,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:20,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:05:20,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:05:20,175 INFO L87 Difference]: Start difference. First operand 212 states and 237 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 06:05:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:20,520 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2024-11-09 06:05:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:05:20,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2024-11-09 06:05:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:20,522 INFO L225 Difference]: With dead ends: 251 [2024-11-09 06:05:20,522 INFO L226 Difference]: Without dead ends: 251 [2024-11-09 06:05:20,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:05:20,523 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:20,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 200 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:05:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-09 06:05:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-11-09 06:05:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 201 states have (on average 1.099502487562189) internal successors, (221), 209 states have internal predecessors, (221), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-09 06:05:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 283 transitions. [2024-11-09 06:05:20,532 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 283 transitions. Word has length 62 [2024-11-09 06:05:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:20,533 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 283 transitions. [2024-11-09 06:05:20,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 06:05:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 283 transitions. [2024-11-09 06:05:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 06:05:20,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:20,535 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:20,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-09 06:05:20,535 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:05:20,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1390578750, now seen corresponding path program 4 times [2024-11-09 06:05:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408792184] [2024-11-09 06:05:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:05:20,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:20,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408792184] [2024-11-09 06:05:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408792184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392544379] [2024-11-09 06:05:20,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:05:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:20,706 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:20,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:05:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:05:20,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:05:20,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:05:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392544379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557744691] [2024-11-09 06:05:21,112 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:05:21,113 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:21,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:21,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:21,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:22,724 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:05:22,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:05:22,728 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:25,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14180#(= |__VERIFIER_assert_#in~cond#1| 0)' at error location [2024-11-09 06:05:25,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:25,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-11-09 06:05:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189236916] [2024-11-09 06:05:25,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:25,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:05:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:05:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:05:25,406 INFO L87 Difference]: Start difference. First operand 251 states and 283 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2024-11-09 06:05:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:25,750 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2024-11-09 06:05:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:05:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 61 [2024-11-09 06:05:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:25,752 INFO L225 Difference]: With dead ends: 220 [2024-11-09 06:05:25,752 INFO L226 Difference]: Without dead ends: 220 [2024-11-09 06:05:25,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:05:25,754 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:25,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-09 06:05:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 210. [2024-11-09 06:05:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 168 states have (on average 1.0833333333333333) internal successors, (182), 174 states have internal predecessors, (182), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-09 06:05:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 234 transitions. [2024-11-09 06:05:25,768 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 234 transitions. Word has length 61 [2024-11-09 06:05:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:25,768 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 234 transitions. [2024-11-09 06:05:25,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2024-11-09 06:05:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 234 transitions. [2024-11-09 06:05:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 06:05:25,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:25,774 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:25,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 06:05:25,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:25,975 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-09 06:05:25,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash 724077373, now seen corresponding path program 1 times [2024-11-09 06:05:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:25,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969741334] [2024-11-09 06:05:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 06:05:27,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:27,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969741334] [2024-11-09 06:05:27,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969741334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:27,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339107430] [2024-11-09 06:05:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:27,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:27,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3964046d-0701-4733-9010-0c281cac691d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:05:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-09 06:05:27,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:27,557 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 [2024-11-09 06:05:28,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-09 06:05:28,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:05:28,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2024-11-09 06:05:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:05:29,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2024-11-09 06:05:29,482 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 10 treesize of output 9 [2024-11-09 06:05:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:05:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:05:29,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 78 [2024-11-09 06:05:29,705 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 14 treesize of output 13 [2024-11-09 06:06:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:27,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:06:29,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:29,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 283 treesize of output 431 [2024-11-09 06:06:34,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:08:50,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:08:51,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:09:05,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:05,745 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 19 treesize of output 23 [2024-11-09 06:09:06,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:06,456 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 19 treesize of output 23 [2024-11-09 06:09:21,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:21,807 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 19 treesize of output 23 [2024-11-09 06:09:24,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:09:31,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:31,457 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 19 treesize of output 23 [2024-11-09 06:09:34,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:09:41,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:09:45,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:45,355 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 19 treesize of output 23 [2024-11-09 06:09:46,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:46,883 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 19 treesize of output 23 [2024-11-09 06:09:48,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:10:27,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:10:57,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:10:57,112 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 19 treesize of output 23 [2024-11-09 06:11:01,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:11:05,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:05,543 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 19 treesize of output 23 [2024-11-09 06:11:07,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:11:25,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:11:28,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:11:30,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:30,908 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 19 treesize of output 23 [2024-11-09 06:11:31,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:31,777 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 19 treesize of output 23 [2024-11-09 06:11:52,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:11:53,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 06:12:04,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:12:04,989 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 19 treesize of output 23 [2024-11-09 06:12:12,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:12:12,102 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 19 treesize of output 23 [2024-11-09 06:15:14,579 WARN L286 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 1642 DAG size of output: 1766 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)