./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX --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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:13:11,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:13:11,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:13:11,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:13:11,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:13:11,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:13:11,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:13:11,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:13:11,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:13:11,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:13:11,870 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:13:11,871 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:13:11,872 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:13:11,874 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:13:11,874 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:13:11,874 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:13:11,875 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:13:11,875 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:13:11,876 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:13:11,876 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:13:11,877 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:13:11,877 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:13:11,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:13:11,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:13:11,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:13:11,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:13:11,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:13:11,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:13:11,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:13:11,882 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:13:11,883 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:13:11,883 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:13:11,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:13:11,884 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:13:11,884 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:13:11,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:13:11,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:13:11,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:13:11,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:13:11,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:11,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:13:11,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:13:11,887 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:13:11,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:13:11,887 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:13:11,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:13:11,888 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_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2023-11-12 00:13:12,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:13:12,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:13:12,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:13:12,233 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:13:12,234 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:13:12,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/memsafety/test-0235-3.i [2023-11-12 00:13:15,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:13:15,689 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:13:15,693 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/sv-benchmarks/c/memsafety/test-0235-3.i [2023-11-12 00:13:15,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/data/66b03e9c5/b598b5885d954203b4e91a1cf8baf192/FLAGdc55cc93c [2023-11-12 00:13:15,736 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/data/66b03e9c5/b598b5885d954203b4e91a1cf8baf192 [2023-11-12 00:13:15,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:13:15,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:13:15,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:15,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:13:15,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:13:15,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:15" (1/1) ... [2023-11-12 00:13:15,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdf30d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:15, skipping insertion in model container [2023-11-12 00:13:15,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:15" (1/1) ... [2023-11-12 00:13:15,808 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:13:16,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:16,190 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:13:16,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:16,287 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:13:16,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16 WrapperNode [2023-11-12 00:13:16,288 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:16,289 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:16,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:13:16,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:13:16,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,382 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 249 [2023-11-12 00:13:16,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:16,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:13:16,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:13:16,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:13:16,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,400 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:13:16,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:13:16,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:13:16,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:13:16,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (1/1) ... [2023-11-12 00:13:16,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:16,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:13:16,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:13:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:13:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:13:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:13:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:13:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-12 00:13:16,528 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-12 00:13:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:13:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:13:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-12 00:13:16,529 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-12 00:13:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:13:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:13:16,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:13:16,692 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:13:16,694 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:13:17,358 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:13:17,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:13:17,478 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 00:13:17,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:17 BoogieIcfgContainer [2023-11-12 00:13:17,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:13:17,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:13:17,488 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:13:17,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:13:17,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:13:15" (1/3) ... [2023-11-12 00:13:17,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1913ed3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:17, skipping insertion in model container [2023-11-12 00:13:17,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:16" (2/3) ... [2023-11-12 00:13:17,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1913ed3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:17, skipping insertion in model container [2023-11-12 00:13:17,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:17" (3/3) ... [2023-11-12 00:13:17,499 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2023-11-12 00:13:17,520 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:13:17,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-11-12 00:13:17,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:13:17,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3693d684, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:13:17,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-11-12 00:13:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 106 states have (on average 2.1320754716981134) internal successors, (226), 195 states have internal predecessors, (226), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:13:17,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:17,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:13:17,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:17,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash 464033, now seen corresponding path program 1 times [2023-11-12 00:13:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33604693] [2023-11-12 00:13:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:17,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33604693] [2023-11-12 00:13:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33604693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:17,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:13:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637031888] [2023-11-12 00:13:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:13:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:13:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:13:17,788 INFO L87 Difference]: Start difference. First operand has 211 states, 106 states have (on average 2.1320754716981134) internal successors, (226), 195 states have internal predecessors, (226), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:17,886 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2023-11-12 00:13:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:13:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 00:13:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:17,899 INFO L225 Difference]: With dead ends: 211 [2023-11-12 00:13:17,899 INFO L226 Difference]: Without dead ends: 210 [2023-11-12 00:13:17,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:13:17,907 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:17,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:13:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-12 00:13:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-11-12 00:13:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 194 states have internal predecessors, (215), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 241 transitions. [2023-11-12 00:13:17,992 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 241 transitions. Word has length 3 [2023-11-12 00:13:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:17,992 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 241 transitions. [2023-11-12 00:13:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 241 transitions. [2023-11-12 00:13:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:13:17,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:17,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:13:17,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:13:17,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:17,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:17,995 INFO L85 PathProgramCache]: Analyzing trace with hash 442035226, now seen corresponding path program 1 times [2023-11-12 00:13:17,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:17,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877112305] [2023-11-12 00:13:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:18,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:18,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595213408] [2023-11-12 00:13:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:18,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:18,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:18,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:13:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:18,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:13:18,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:18,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:13:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:18,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:18,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877112305] [2023-11-12 00:13:18,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595213408] [2023-11-12 00:13:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595213408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:18,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:18,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:13:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940407367] [2023-11-12 00:13:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:13:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:13:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:13:18,361 INFO L87 Difference]: Start difference. First operand 210 states and 241 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:18,600 INFO L93 Difference]: Finished difference Result 209 states and 240 transitions. [2023-11-12 00:13:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:13:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:13:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:18,605 INFO L225 Difference]: With dead ends: 209 [2023-11-12 00:13:18,605 INFO L226 Difference]: Without dead ends: 209 [2023-11-12 00:13:18,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:13:18,609 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:18,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 365 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:13:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-12 00:13:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-12 00:13:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 106 states have (on average 2.018867924528302) internal successors, (214), 193 states have internal predecessors, (214), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 240 transitions. [2023-11-12 00:13:18,643 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 240 transitions. Word has length 5 [2023-11-12 00:13:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:18,643 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 240 transitions. [2023-11-12 00:13:18,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 240 transitions. [2023-11-12 00:13:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:13:18,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:18,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:13:18,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:13:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:18,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:18,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash 818190549, now seen corresponding path program 1 times [2023-11-12 00:13:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:18,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733800598] [2023-11-12 00:13:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:18,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:18,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410215553] [2023-11-12 00:13:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:18,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:13:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:18,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:13:18,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:19,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:13:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:19,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:19,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733800598] [2023-11-12 00:13:19,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410215553] [2023-11-12 00:13:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410215553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:19,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:19,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:13:19,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404621204] [2023-11-12 00:13:19,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:13:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:13:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:13:19,091 INFO L87 Difference]: Start difference. First operand 209 states and 240 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:19,366 INFO L93 Difference]: Finished difference Result 214 states and 245 transitions. [2023-11-12 00:13:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:13:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:13:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:19,369 INFO L225 Difference]: With dead ends: 214 [2023-11-12 00:13:19,370 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 00:13:19,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:13:19,374 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 7 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:19,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 573 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:13:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 00:13:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-12 00:13:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 110 states have (on average 1.990909090909091) internal successors, (219), 197 states have internal predecessors, (219), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 245 transitions. [2023-11-12 00:13:19,404 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 245 transitions. Word has length 6 [2023-11-12 00:13:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:19,405 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 245 transitions. [2023-11-12 00:13:19,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 245 transitions. [2023-11-12 00:13:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:13:19,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:19,412 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:19,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:19,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 00:13:19,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:19,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:19,619 INFO L85 PathProgramCache]: Analyzing trace with hash -207481982, now seen corresponding path program 1 times [2023-11-12 00:13:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:19,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73473603] [2023-11-12 00:13:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:19,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:19,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700223885] [2023-11-12 00:13:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:19,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:19,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:19,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:13:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:19,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:19,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:19,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:13:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:13:19,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:19,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:19,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73473603] [2023-11-12 00:13:19,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700223885] [2023-11-12 00:13:19,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700223885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:19,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:19,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:13:19,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949440411] [2023-11-12 00:13:19,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:19,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:13:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:13:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:13:20,000 INFO L87 Difference]: Start difference. First operand 214 states and 245 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:13:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:20,247 INFO L93 Difference]: Finished difference Result 213 states and 244 transitions. [2023-11-12 00:13:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:13:20,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2023-11-12 00:13:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:20,250 INFO L225 Difference]: With dead ends: 213 [2023-11-12 00:13:20,250 INFO L226 Difference]: Without dead ends: 213 [2023-11-12 00:13:20,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:13:20,254 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 7 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:20,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 587 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:13:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-12 00:13:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-12 00:13:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 110 states have (on average 1.981818181818182) internal successors, (218), 196 states have internal predecessors, (218), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2023-11-12 00:13:20,276 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 45 [2023-11-12 00:13:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:20,278 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2023-11-12 00:13:20,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:13:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2023-11-12 00:13:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 00:13:20,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:20,283 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:20,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:20,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:20,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -637287249, now seen corresponding path program 1 times [2023-11-12 00:13:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491498125] [2023-11-12 00:13:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:20,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:20,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175793179] [2023-11-12 00:13:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:20,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:20,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:13:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:20,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:20,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:20,857 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-12 00:13:20,893 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:13:20,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 00:13:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 3 not checked. [2023-11-12 00:13:20,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:21,181 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:13:21,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 00:13:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 00:13:21,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491498125] [2023-11-12 00:13:21,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175793179] [2023-11-12 00:13:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175793179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575577503] [2023-11-12 00:13:21,234 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:21,234 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:21,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:21,246 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:21,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:21,644 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 57 for LOIs [2023-11-12 00:13:21,801 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:22,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [575577503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:22,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:22,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2023-11-12 00:13:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726570089] [2023-11-12 00:13:22,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:13:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:13:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-12 00:13:22,826 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:13:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:23,852 INFO L93 Difference]: Finished difference Result 219 states and 251 transitions. [2023-11-12 00:13:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-11-12 00:13:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:23,856 INFO L225 Difference]: With dead ends: 219 [2023-11-12 00:13:23,856 INFO L226 Difference]: Without dead ends: 219 [2023-11-12 00:13:23,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-12 00:13:23,857 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 390 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:13:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-12 00:13:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-12 00:13:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 115 states have (on average 1.9391304347826086) internal successors, (223), 201 states have internal predecessors, (223), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:13:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 251 transitions. [2023-11-12 00:13:23,867 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 251 transitions. Word has length 48 [2023-11-12 00:13:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:23,868 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 251 transitions. [2023-11-12 00:13:23,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:13:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 251 transitions. [2023-11-12 00:13:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:13:23,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:23,870 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:23,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:24,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:24,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -583316456, now seen corresponding path program 1 times [2023-11-12 00:13:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601365549] [2023-11-12 00:13:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:24,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:24,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124733002] [2023-11-12 00:13:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:24,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:24,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:13:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:24,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:24,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:24,401 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-12 00:13:24,425 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:13:24,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 00:13:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 3 not checked. [2023-11-12 00:13:24,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:24,690 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:13:24,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 00:13:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:13:24,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601365549] [2023-11-12 00:13:24,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124733002] [2023-11-12 00:13:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124733002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103749776] [2023-11-12 00:13:24,715 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:24,715 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:24,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:24,716 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:24,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:29,330 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-11-12 00:13:29,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:36,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3121#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (exists ((|v_#length_BEFORE_CALL_9| (Array Int Int))) (and (= 14 (select |v_#length_BEFORE_CALL_9| 2)) (= (select |v_#length_BEFORE_CALL_9| 3) 4) (= 2 (select |v_#length_BEFORE_CALL_9| 1)))) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_59| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_59| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| 4294967296)))) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_9| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_9| 3) 0) 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_BEFORE_CALL_9| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_9| 1) 1) 0) (= 48 (select (select |v_#memory_int_BEFORE_CALL_9| 1) 0)))) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_9| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_9| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|)) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_7| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_#memory_int_BEFORE_CALL_7| 1) 0) 48))) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_59| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_59| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_63| 4294967296)))) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_7| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_7| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_7| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_7| 1) 2) (= (select |v_#length_BEFORE_CALL_7| 2) 14) (= (select |v_#length_BEFORE_CALL_7| 3) 4))) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_7| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_7| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-11-12 00:13:36,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:36,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-11-12 00:13:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924790744] [2023-11-12 00:13:36,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=4, NotChecked=62, Total=1122 [2023-11-12 00:13:36,507 INFO L87 Difference]: Start difference. First operand 219 states and 251 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:13:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:37,326 INFO L93 Difference]: Finished difference Result 309 states and 362 transitions. [2023-11-12 00:13:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2023-11-12 00:13:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:37,331 INFO L225 Difference]: With dead ends: 309 [2023-11-12 00:13:37,331 INFO L226 Difference]: Without dead ends: 309 [2023-11-12 00:13:37,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=4, NotChecked=66, Total=1260 [2023-11-12 00:13:37,333 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 219 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:37,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1140 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 702 Invalid, 0 Unknown, 347 Unchecked, 0.7s Time] [2023-11-12 00:13:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-12 00:13:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 217. [2023-11-12 00:13:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 199 states have internal predecessors, (221), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:13:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 249 transitions. [2023-11-12 00:13:37,352 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 249 transitions. Word has length 49 [2023-11-12 00:13:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:37,355 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 249 transitions. [2023-11-12 00:13:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:13:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 249 transitions. [2023-11-12 00:13:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:13:37,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:37,357 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:37,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:37,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:13:37,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:37,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -583316455, now seen corresponding path program 1 times [2023-11-12 00:13:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:37,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561029668] [2023-11-12 00:13:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:37,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:37,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339327066] [2023-11-12 00:13:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:37,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:37,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:13:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:37,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:37,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:38,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:13:38,081 INFO L351 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 15 treesize of output 11 [2023-11-12 00:13:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:13:38,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:13:38,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561029668] [2023-11-12 00:13:38,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339327066] [2023-11-12 00:13:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339327066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422098567] [2023-11-12 00:13:38,529 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:38,529 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:38,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:38,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:38,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:42,382 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-11-12 00:13:42,785 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:45,302 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|) (let ((.cse0 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse2 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse3 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse4 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 4294967296))))) (.cse5 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse6 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse7 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse9 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1))) (or (and .cse0 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_39| 3) 0) 0)) .cse1 .cse2 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_39| 3) 0) 0)) .cse3 .cse4 .cse5 (exists ((|v_#length_BEFORE_CALL_39| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_39| 1)) (= (select |v_#length_BEFORE_CALL_39| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_39| 2)))) .cse6 .cse7 (exists ((|v_#memory_int_BEFORE_CALL_39| (Array Int (Array Int Int)))) (let ((.cse8 (select |v_#memory_int_BEFORE_CALL_39| 1))) (and (= (select .cse8 0) 48) (= (select .cse8 1) 0)))) .cse9) (and (exists ((|v_#memory_int_BEFORE_CALL_37| (Array Int (Array Int Int)))) (let ((.cse10 (select |v_#memory_int_BEFORE_CALL_37| 1))) (and (= (select .cse10 0) 48) (= (select .cse10 1) 0)))) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_37| 3) 0) 0)) .cse0 .cse1 .cse2 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_37| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_37| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_37| 1)) (= (select |v_#length_BEFORE_CALL_37| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_37| 2)))) .cse3 .cse4 .cse5 .cse6 .cse7 .cse9))) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|)) is different from true [2023-11-12 00:13:45,378 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (let ((.cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse2 (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|)) (.cse3 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse4 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse5 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse6 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 4294967296))))) (.cse7 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse8 (not (= 0 |c_ULTIMATE.start_l2_insert_#t~ret12#1.base|))) (.cse9 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse10 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse11 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse12 (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|))) (or (and (exists ((|v_#memory_int_BEFORE_CALL_37| (Array Int (Array Int Int)))) (let ((.cse0 (select |v_#memory_int_BEFORE_CALL_37| 1))) (and (= (select .cse0 0) 48) (= (select .cse0 1) 0)))) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_37| 3) 0) 0)) .cse1 .cse2 .cse3 .cse4 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_37| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_37| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_37| 1)) (= (select |v_#length_BEFORE_CALL_37| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_37| 2)))) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12) (and .cse1 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_39| 3) 0) 0)) .cse2 .cse3 .cse4 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_39| 3) 0) 0)) .cse5 .cse6 .cse7 (exists ((|v_#length_BEFORE_CALL_39| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_39| 1)) (= (select |v_#length_BEFORE_CALL_39| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_39| 2)))) .cse8 .cse9 .cse10 (exists ((|v_#memory_int_BEFORE_CALL_39| (Array Int (Array Int Int)))) (let ((.cse13 (select |v_#memory_int_BEFORE_CALL_39| 1))) (and (= (select .cse13 0) 48) (= (select .cse13 1) 0)))) .cse11 .cse12))) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l2_insert_#t~ret12#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0)) is different from true [2023-11-12 00:13:48,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3971#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) 7) (= 3 |~#list~0.base|) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_39| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_39| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_39| 3) 0) 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 4294967296)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_BEFORE_CALL_39| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_39| 1)) (= (select |v_#length_BEFORE_CALL_39| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_39| 2)))) (exists ((|v_#memory_int_BEFORE_CALL_39| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_39| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_39| 1) 1) 0))) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|)) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#memory_int_BEFORE_CALL_37| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_37| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_37| 1) 1) 0))) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_37| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_37| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_37| 3) 0) 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (exists ((|v_#length_BEFORE_CALL_37| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_37| 1)) (= (select |v_#length_BEFORE_CALL_37| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_37| 2)))) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_82| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr41#1_93| 4294967296)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-11-12 00:13:48,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:48,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2023-11-12 00:13:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947411380] [2023-11-12 00:13:48,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:13:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:13:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=674, Unknown=11, NotChecked=110, Total=930 [2023-11-12 00:13:48,715 INFO L87 Difference]: Start difference. First operand 217 states and 249 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:13:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:51,312 INFO L93 Difference]: Finished difference Result 225 states and 257 transitions. [2023-11-12 00:13:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 49 [2023-11-12 00:13:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:51,315 INFO L225 Difference]: With dead ends: 225 [2023-11-12 00:13:51,315 INFO L226 Difference]: Without dead ends: 221 [2023-11-12 00:13:51,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=148, Invalid=779, Unknown=11, NotChecked=118, Total=1056 [2023-11-12 00:13:51,317 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 7 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:51,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 987 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:13:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-12 00:13:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2023-11-12 00:13:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 114 states have (on average 1.9298245614035088) internal successors, (220), 198 states have internal predecessors, (220), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2023-11-12 00:13:51,328 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 49 [2023-11-12 00:13:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:51,328 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2023-11-12 00:13:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:13:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2023-11-12 00:13:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:13:51,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:51,330 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:51,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:51,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:13:51,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:51,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1392247536, now seen corresponding path program 2 times [2023-11-12 00:13:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923202383] [2023-11-12 00:13:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:51,597 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:51,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543833582] [2023-11-12 00:13:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:13:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:51,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:51,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:13:51,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:13:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:51,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:13:51,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:52,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:13:52,030 INFO L351 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 13 treesize of output 9 [2023-11-12 00:13:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 00:13:52,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 00:13:52,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923202383] [2023-11-12 00:13:52,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543833582] [2023-11-12 00:13:52,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543833582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598182296] [2023-11-12 00:13:52,479 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:52,479 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:52,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:52,481 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:52,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:54,006 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:54,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:55,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4803#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-11-12 00:13:55,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:55,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:55,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 00:13:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571234333] [2023-11-12 00:13:55,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:55,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:13:55,694 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:13:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:56,513 INFO L93 Difference]: Finished difference Result 223 states and 256 transitions. [2023-11-12 00:13:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:13:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2023-11-12 00:13:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:56,518 INFO L225 Difference]: With dead ends: 223 [2023-11-12 00:13:56,518 INFO L226 Difference]: Without dead ends: 220 [2023-11-12 00:13:56,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:13:56,520 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 30 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:56,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 954 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:13:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-12 00:13:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-12 00:13:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.8907563025210083) internal successors, (225), 203 states have internal predecessors, (225), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2023-11-12 00:13:56,532 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 60 [2023-11-12 00:13:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:56,533 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2023-11-12 00:13:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:13:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2023-11-12 00:13:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:13:56,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:56,536 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:56,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:56,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:13:56,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:13:56,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1559094845, now seen corresponding path program 3 times [2023-11-12 00:13:56,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:56,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376390499] [2023-11-12 00:13:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:56,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:56,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086541714] [2023-11-12 00:13:56,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:13:56,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:56,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:56,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:13:57,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:13:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:57,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 00:13:57,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:58,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:13:58,052 INFO L351 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 13 treesize of output 9 [2023-11-12 00:13:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 194 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-12 00:13:58,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 19 proven. 94 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-11-12 00:13:58,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376390499] [2023-11-12 00:13:58,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086541714] [2023-11-12 00:13:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086541714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568997200] [2023-11-12 00:13:58,561 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:58,561 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:58,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:58,562 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:58,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:59,481 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:59,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:01,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5703#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-11-12 00:14:01,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:01,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:01,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-12 00:14:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769082608] [2023-11-12 00:14:01,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:01,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:14:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:14:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:14:01,246 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:14:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:02,224 INFO L93 Difference]: Finished difference Result 230 states and 265 transitions. [2023-11-12 00:14:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:14:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2023-11-12 00:14:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:02,234 INFO L225 Difference]: With dead ends: 230 [2023-11-12 00:14:02,235 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 00:14:02,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:14:02,240 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 16 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:02,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1817 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:14:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 00:14:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-12 00:14:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 126 states have (on average 1.8412698412698412) internal successors, (232), 210 states have internal predecessors, (232), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:14:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 258 transitions. [2023-11-12 00:14:02,272 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 258 transitions. Word has length 69 [2023-11-12 00:14:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:02,272 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 258 transitions. [2023-11-12 00:14:02,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:14:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 258 transitions. [2023-11-12 00:14:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 00:14:02,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:02,275 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:02,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:02,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 00:14:02,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:14:02,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1472348752, now seen corresponding path program 4 times [2023-11-12 00:14:02,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:02,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962358601] [2023-11-12 00:14:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:02,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:02,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052007934] [2023-11-12 00:14:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:14:02,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:02,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:02,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0434dc36-7e09-4b1d-8b6d-2277ab6adf72/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process