./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:55:43,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:55:43,235 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:55:43,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:55:43,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:55:43,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:55:43,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:55:43,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:55:43,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:55:43,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:55:43,273 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:55:43,274 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:55:43,274 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:55:43,275 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:55:43,275 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:55:43,276 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:55:43,276 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:55:43,277 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:55:43,278 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:55:43,278 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:55:43,279 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:55:43,280 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:55:43,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:55:43,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:55:43,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:55:43,282 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:55:43,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:55:43,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:55:43,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:55:43,285 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:55:43,285 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:55:43,286 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:55:43,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:55:43,287 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:55:43,287 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:55:43,287 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:55:43,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:55:43,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:55:43,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:55:43,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:55:43,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:55:43,290 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:55:43,290 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:55:43,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:55:43,290 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:55:43,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:55:43,291 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_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab [2023-11-06 20:55:43,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:55:43,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:55:43,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:55:43,576 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:55:43,577 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:55:43,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2023-11-06 20:55:46,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:55:46,981 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:55:46,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2023-11-06 20:55:47,006 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/data/6db00f5eb/3a2805f24a474e77b3968a0f0a797f4a/FLAG67eef47cb [2023-11-06 20:55:47,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/data/6db00f5eb/3a2805f24a474e77b3968a0f0a797f4a [2023-11-06 20:55:47,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:55:47,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:55:47,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:55:47,029 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:55:47,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:55:47,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a050d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47, skipping insertion in model container [2023-11-06 20:55:47,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,085 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:55:47,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:55:47,481 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:55:47,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:55:47,571 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:55:47,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47 WrapperNode [2023-11-06 20:55:47,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:55:47,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:55:47,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:55:47,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:55:47,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,658 INFO L138 Inliner]: procedures = 119, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-11-06 20:55:47,658 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:55:47,659 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:55:47,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:55:47,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:55:47,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:55:47,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:55:47,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:55:47,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:55:47,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (1/1) ... [2023-11-06 20:55:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:55:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:55:47,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:55:47,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:55:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-06 20:55:47,802 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-06 20:55:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:55:47,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:55:47,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:55:47,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:55:47,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:55:47,941 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:55:47,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:55:48,007 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-06 20:55:48,479 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:55:48,530 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:55:48,530 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 20:55:48,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:55:48 BoogieIcfgContainer [2023-11-06 20:55:48,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:55:48,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:55:48,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:55:48,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:55:48,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:55:47" (1/3) ... [2023-11-06 20:55:48,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48566aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:55:48, skipping insertion in model container [2023-11-06 20:55:48,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:55:47" (2/3) ... [2023-11-06 20:55:48,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48566aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:55:48, skipping insertion in model container [2023-11-06 20:55:48,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:55:48" (3/3) ... [2023-11-06 20:55:48,545 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_flag.i [2023-11-06 20:55:48,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:55:48,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2023-11-06 20:55:48,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:55:48,642 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;@43ddc2e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:55:48,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-11-06 20:55:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:55:48,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:48,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:55:48,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:48,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash 229137, now seen corresponding path program 1 times [2023-11-06 20:55:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734855794] [2023-11-06 20:55:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:48,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:48,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734855794] [2023-11-06 20:55:48,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734855794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:48,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:48,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:55:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937785584] [2023-11-06 20:55:48,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:48,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:55:48,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:55:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,000 INFO L87 Difference]: Start difference. First operand has 98 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 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) [2023-11-06 20:55:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:49,138 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2023-11-06 20:55:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:55:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2023-11-06 20:55:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:49,150 INFO L225 Difference]: With dead ends: 115 [2023-11-06 20:55:49,150 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 20:55:49,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,160 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 92 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:49,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 74 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 20:55:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2023-11-06 20:55:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 2.108695652173913) internal successors, (97), 89 states have internal predecessors, (97), 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) [2023-11-06 20:55:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-11-06 20:55:49,206 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 3 [2023-11-06 20:55:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:49,207 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-11-06 20:55:49,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-06 20:55:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-11-06 20:55:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:55:49,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:49,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:55:49,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:55:49,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:49,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 229138, now seen corresponding path program 1 times [2023-11-06 20:55:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404809817] [2023-11-06 20:55:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:49,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:49,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404809817] [2023-11-06 20:55:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404809817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:49,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:49,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:55:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580305590] [2023-11-06 20:55:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:55:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:49,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:55:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,384 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 3 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) [2023-11-06 20:55:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:49,616 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2023-11-06 20:55:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:55:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2023-11-06 20:55:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:49,621 INFO L225 Difference]: With dead ends: 168 [2023-11-06 20:55:49,621 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 20:55:49,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,623 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 86 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:49,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 119 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 20:55:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 89. [2023-11-06 20:55:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 88 states have internal predecessors, (96), 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) [2023-11-06 20:55:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2023-11-06 20:55:49,652 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 3 [2023-11-06 20:55:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:49,652 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2023-11-06 20:55:49,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-06 20:55:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2023-11-06 20:55:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:55:49,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:49,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:55:49,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:55:49,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:49,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1757850099, now seen corresponding path program 1 times [2023-11-06 20:55:49,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:49,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942537386] [2023-11-06 20:55:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:49,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942537386] [2023-11-06 20:55:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942537386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:49,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:55:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100101469] [2023-11-06 20:55:49,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:55:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:55:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,777 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-06 20:55:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:49,903 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2023-11-06 20:55:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:55:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-06 20:55:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:49,908 INFO L225 Difference]: With dead ends: 83 [2023-11-06 20:55:49,909 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 20:55:49,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:55:49,912 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:49,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 45 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 20:55:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2023-11-06 20:55:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 79 states have internal predecessors, (91), 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) [2023-11-06 20:55:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-06 20:55:49,922 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 6 [2023-11-06 20:55:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:49,922 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-06 20:55:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-06 20:55:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-06 20:55:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:55:49,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:49,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:55:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:55:49,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:49,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1757850098, now seen corresponding path program 1 times [2023-11-06 20:55:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:49,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314826776] [2023-11-06 20:55:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:50,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314826776] [2023-11-06 20:55:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314826776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:55:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951127882] [2023-11-06 20:55:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:55:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:55:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:55:50,216 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-06 20:55:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:50,487 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-11-06 20:55:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:55:50,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-06 20:55:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:50,490 INFO L225 Difference]: With dead ends: 167 [2023-11-06 20:55:50,490 INFO L226 Difference]: Without dead ends: 167 [2023-11-06 20:55:50,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:50,492 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:50,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 104 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-06 20:55:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 111. [2023-11-06 20:55:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.7195121951219512) internal successors, (141), 110 states have internal predecessors, (141), 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) [2023-11-06 20:55:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-11-06 20:55:50,504 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 6 [2023-11-06 20:55:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:50,504 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-11-06 20:55:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-06 20:55:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-11-06 20:55:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:55:50,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:50,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:50,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:55:50,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:50,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1341226045, now seen corresponding path program 1 times [2023-11-06 20:55:50,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:50,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461457985] [2023-11-06 20:55:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:50,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:50,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461457985] [2023-11-06 20:55:50,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461457985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:50,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:50,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:55:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260936154] [2023-11-06 20:55:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:50,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:55:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:50,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:55:50,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:55:50,581 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:50,745 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2023-11-06 20:55:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:55:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 20:55:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:50,749 INFO L225 Difference]: With dead ends: 162 [2023-11-06 20:55:50,749 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 20:55:50,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:50,751 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 164 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:50,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 70 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 20:55:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 120. [2023-11-06 20:55:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 119 states have internal predecessors, (156), 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) [2023-11-06 20:55:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-11-06 20:55:50,761 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 7 [2023-11-06 20:55:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:50,762 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-11-06 20:55:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-11-06 20:55:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:55:50,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:50,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:50,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:55:50,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:50,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1294932606, now seen corresponding path program 1 times [2023-11-06 20:55:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:50,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141299890] [2023-11-06 20:55:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:51,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:51,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141299890] [2023-11-06 20:55:51,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141299890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:51,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:51,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:55:51,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527159114] [2023-11-06 20:55:51,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:51,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:55:51,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:55:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:55:51,103 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:51,364 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2023-11-06 20:55:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:55:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 20:55:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:51,366 INFO L225 Difference]: With dead ends: 171 [2023-11-06 20:55:51,366 INFO L226 Difference]: Without dead ends: 171 [2023-11-06 20:55:51,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:55:51,367 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:51,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 99 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-06 20:55:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2023-11-06 20:55:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 123 states have internal predecessors, (160), 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) [2023-11-06 20:55:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2023-11-06 20:55:51,387 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 12 [2023-11-06 20:55:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:51,388 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2023-11-06 20:55:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2023-11-06 20:55:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:55:51,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:51,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:51,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:55:51,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:51,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1505551737, now seen corresponding path program 1 times [2023-11-06 20:55:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:51,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718131646] [2023-11-06 20:55:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:51,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:51,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718131646] [2023-11-06 20:55:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718131646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:51,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:51,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:55:51,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657301598] [2023-11-06 20:55:51,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:55:51,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:55:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:55:51,524 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:51,643 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2023-11-06 20:55:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:55:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 20:55:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:51,644 INFO L225 Difference]: With dead ends: 156 [2023-11-06 20:55:51,645 INFO L226 Difference]: Without dead ends: 156 [2023-11-06 20:55:51,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:55:51,647 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:51,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 213 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-06 20:55:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2023-11-06 20:55:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 123 states have internal predecessors, (159), 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) [2023-11-06 20:55:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2023-11-06 20:55:51,665 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 13 [2023-11-06 20:55:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:51,665 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2023-11-06 20:55:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2023-11-06 20:55:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:55:51,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:51,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:51,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:55:51,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:51,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:51,669 INFO L85 PathProgramCache]: Analyzing trace with hash -572201438, now seen corresponding path program 1 times [2023-11-06 20:55:51,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:51,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422652565] [2023-11-06 20:55:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:51,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422652565] [2023-11-06 20:55:51,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422652565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:51,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:51,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:55:51,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163110636] [2023-11-06 20:55:51,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:51,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:55:51,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:55:51,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:55:51,790 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-06 20:55:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:51,900 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2023-11-06 20:55:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:55:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:55:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:51,902 INFO L225 Difference]: With dead ends: 147 [2023-11-06 20:55:51,902 INFO L226 Difference]: Without dead ends: 147 [2023-11-06 20:55:51,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:51,906 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 161 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:51,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 81 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-06 20:55:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2023-11-06 20:55:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.6565656565656566) internal successors, (164), 126 states have internal predecessors, (164), 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) [2023-11-06 20:55:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2023-11-06 20:55:51,918 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 14 [2023-11-06 20:55:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:51,918 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2023-11-06 20:55:51,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-06 20:55:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2023-11-06 20:55:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:55:51,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:51,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:51,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:55:51,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:51,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash 263624502, now seen corresponding path program 1 times [2023-11-06 20:55:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:51,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479882345] [2023-11-06 20:55:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:51,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:52,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479882345] [2023-11-06 20:55:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479882345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:52,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:55:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18592568] [2023-11-06 20:55:52,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:52,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:55:52,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:55:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:55:52,180 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-06 20:55:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:52,426 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-11-06 20:55:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:55:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:55:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:52,431 INFO L225 Difference]: With dead ends: 136 [2023-11-06 20:55:52,431 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 20:55:52,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:55:52,432 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 199 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:52,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 114 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 20:55:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 107. [2023-11-06 20:55:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 106 states have internal predecessors, (127), 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) [2023-11-06 20:55:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2023-11-06 20:55:52,436 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 14 [2023-11-06 20:55:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:52,436 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2023-11-06 20:55:52,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-06 20:55:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2023-11-06 20:55:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:55:52,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:52,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:52,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:55:52,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:52,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash -558375221, now seen corresponding path program 1 times [2023-11-06 20:55:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973696393] [2023-11-06 20:55:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:52,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:52,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973696393] [2023-11-06 20:55:52,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973696393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:52,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:52,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:55:52,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674353305] [2023-11-06 20:55:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:52,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:55:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:55:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:55:52,498 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:52,622 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2023-11-06 20:55:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:55:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 20:55:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:52,623 INFO L225 Difference]: With dead ends: 131 [2023-11-06 20:55:52,623 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 20:55:52,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:52,624 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 166 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:52,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 67 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:55:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 20:55:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2023-11-06 20:55:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 81 states have (on average 1.5802469135802468) internal successors, (128), 107 states have internal predecessors, (128), 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) [2023-11-06 20:55:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2023-11-06 20:55:52,628 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 15 [2023-11-06 20:55:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:52,629 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2023-11-06 20:55:52,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:55:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2023-11-06 20:55:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:55:52,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:52,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:52,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:55:52,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:52,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143157, now seen corresponding path program 1 times [2023-11-06 20:55:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:52,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817164531] [2023-11-06 20:55:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:52,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817164531] [2023-11-06 20:55:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817164531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:52,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:55:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036206846] [2023-11-06 20:55:52,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:52,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:55:52,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:55:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:52,779 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-06 20:55:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:52,971 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2023-11-06 20:55:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:55:52,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-06 20:55:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:52,973 INFO L225 Difference]: With dead ends: 114 [2023-11-06 20:55:52,973 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 20:55:52,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:55:52,974 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 116 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:52,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 101 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 20:55:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-11-06 20:55:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 105 states have internal predecessors, (126), 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) [2023-11-06 20:55:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2023-11-06 20:55:52,978 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 16 [2023-11-06 20:55:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:52,978 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2023-11-06 20:55:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-06 20:55:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2023-11-06 20:55:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:55:52,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:52,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:55:52,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:52,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143156, now seen corresponding path program 1 times [2023-11-06 20:55:52,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670209240] [2023-11-06 20:55:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:53,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670209240] [2023-11-06 20:55:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670209240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:55:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:55:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:55:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725129217] [2023-11-06 20:55:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:55:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:55:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:55:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:55:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:55:53,186 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-06 20:55:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:55:53,433 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-11-06 20:55:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:55:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-06 20:55:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:55:53,434 INFO L225 Difference]: With dead ends: 110 [2023-11-06 20:55:53,434 INFO L226 Difference]: Without dead ends: 110 [2023-11-06 20:55:53,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:55:53,435 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:55:53,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 161 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:55:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-06 20:55:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2023-11-06 20:55:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 89 states have internal predecessors, (109), 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) [2023-11-06 20:55:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2023-11-06 20:55:53,439 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 16 [2023-11-06 20:55:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:55:53,440 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2023-11-06 20:55:53,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-06 20:55:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2023-11-06 20:55:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:55:53,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:55:53,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:55:53,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:55:53,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:55:53,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:55:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -713858753, now seen corresponding path program 1 times [2023-11-06 20:55:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:55:53,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890840841] [2023-11-06 20:55:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:53,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:55:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:53,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:55:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890840841] [2023-11-06 20:55:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890840841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:55:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933794987] [2023-11-06 20:55:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:55:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:55:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:55:53,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:55:53,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:55:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:55:53,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:55:53,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:55:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:53,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:55:53,788 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 20:55:53,789 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 [2023-11-06 20:55:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:55:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933794987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:55:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035346765] [2023-11-06 20:55:53,841 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:55:53,841 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:55:53,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:55:53,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:55:53,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:55:59,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:00,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3226#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_51| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_82| Int) (|v_#memory_$Pointer$.base_51| (Array Int (Array Int Int))) (|v_#memory_int_49| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_101| Int)) (and (= (store |v_#memory_$Pointer$.base_51| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_$Pointer$.base_51| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82|))) |#memory_$Pointer$.base|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_82|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_101|) 1) (= (store |v_#memory_int_49| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_int_49| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| 3)) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_51| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_$Pointer$.offset_51| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82|)))) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_82| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_101|)))) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2023-11-06 20:56:00,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:00,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:00,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-06 20:56:00,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041490084] [2023-11-06 20:56:00,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:56:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:56:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=268, Unknown=2, NotChecked=0, Total=342 [2023-11-06 20:56:00,534 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-06 20:56:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:00,689 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2023-11-06 20:56:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:56:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 17 [2023-11-06 20:56:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:00,691 INFO L225 Difference]: With dead ends: 122 [2023-11-06 20:56:00,691 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 20:56:00,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=301, Unknown=2, NotChecked=0, Total=380 [2023-11-06 20:56:00,692 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:00,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 71 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 20:56:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2023-11-06 20:56:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.462686567164179) internal successors, (98), 83 states have internal predecessors, (98), 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) [2023-11-06 20:56:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-11-06 20:56:00,696 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 17 [2023-11-06 20:56:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:00,696 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-11-06 20:56:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-06 20:56:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-11-06 20:56:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:56:00,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:00,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:00,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:00,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:00,898 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:56:00,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -713858752, now seen corresponding path program 1 times [2023-11-06 20:56:00,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:00,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756924337] [2023-11-06 20:56:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:01,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:01,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756924337] [2023-11-06 20:56:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756924337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130141107] [2023-11-06 20:56:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:01,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:01,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:01,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:01,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:56:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:01,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:56:01,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:01,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:01,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:01,390 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 19 treesize of output 23 [2023-11-06 20:56:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130141107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013414450] [2023-11-06 20:56:01,565 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:56:01,565 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:01,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:01,566 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:01,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:06,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:08,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3559#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_main_~p~0#1.base|) 3) (<= 0 |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_109| Int) (|v_#memory_$Pointer$.base_70| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_90| Int) (|v_#memory_int_68| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_70| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_70| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_$Pointer$.base_70| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90|))) |#memory_$Pointer$.base|) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_90| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_109|)) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_109|) 1) (= (store |v_#memory_int_68| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_int_68| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| 3)) |#memory_int|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_90|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90|)))))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2023-11-06 20:56:08,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:08,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:08,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-06 20:56:08,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047984142] [2023-11-06 20:56:08,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 20:56:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:08,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 20:56:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=665, Unknown=2, NotChecked=0, Total=812 [2023-11-06 20:56:08,240 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2023-11-06 20:56:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:08,584 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2023-11-06 20:56:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:56:08,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 17 [2023-11-06 20:56:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:08,585 INFO L225 Difference]: With dead ends: 108 [2023-11-06 20:56:08,585 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 20:56:08,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=170, Invalid=758, Unknown=2, NotChecked=0, Total=930 [2023-11-06 20:56:08,587 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 292 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:08,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 190 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:56:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 20:56:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2023-11-06 20:56:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-11-06 20:56:08,591 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 17 [2023-11-06 20:56:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:08,595 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-11-06 20:56:08,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2023-11-06 20:56:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-11-06 20:56:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:56:08,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:08,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:08,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:08,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:08,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:56:08,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:08,807 INFO L85 PathProgramCache]: Analyzing trace with hash -147696494, now seen corresponding path program 1 times [2023-11-06 20:56:08,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:08,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741704197] [2023-11-06 20:56:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:08,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741704197] [2023-11-06 20:56:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741704197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:56:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795394740] [2023-11-06 20:56:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:08,946 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:09,120 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2023-11-06 20:56:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:56:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:56:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:09,122 INFO L225 Difference]: With dead ends: 123 [2023-11-06 20:56:09,122 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 20:56:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:56:09,123 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 75 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:09,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 20:56:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2023-11-06 20:56:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 86 states have internal predecessors, (100), 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) [2023-11-06 20:56:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-11-06 20:56:09,127 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 18 [2023-11-06 20:56:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:09,128 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-11-06 20:56:09,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-11-06 20:56:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:56:09,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:09,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:09,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:56:09,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:56:09,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1756026396, now seen corresponding path program 1 times [2023-11-06 20:56:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454102086] [2023-11-06 20:56:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:09,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:56:09,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454102086] [2023-11-06 20:56:09,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454102086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:09,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:09,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:56:09,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768024341] [2023-11-06 20:56:09,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:56:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:56:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:56:09,397 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-11-06 20:56:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:09,588 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2023-11-06 20:56:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:56:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2023-11-06 20:56:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:09,590 INFO L225 Difference]: With dead ends: 93 [2023-11-06 20:56:09,590 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 20:56:09,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:56:09,591 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:09,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 171 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 20:56:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-11-06 20:56:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.390625) internal successors, (89), 76 states have internal predecessors, (89), 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) [2023-11-06 20:56:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-11-06 20:56:09,595 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2023-11-06 20:56:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:09,595 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-11-06 20:56:09,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-11-06 20:56:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-11-06 20:56:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:56:09,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:09,596 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:09,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 20:56:09,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:56:09,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1464566011, now seen corresponding path program 1 times [2023-11-06 20:56:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:09,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678582612] [2023-11-06 20:56:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:09,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678582612] [2023-11-06 20:56:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678582612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875509182] [2023-11-06 20:56:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:09,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:09,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:09,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:56:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:09,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 20:56:09,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:09,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875509182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372871111] [2023-11-06 20:56:10,011 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-06 20:56:10,011 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:10,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:10,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:10,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:14,940 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:16,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4312#(and (<= 21 |ULTIMATE.start_main_~i~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_118| Int) (|v_#memory_$Pointer$.base_92| (Array Int (Array Int Int))) (|v_#memory_int_90| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_99| Int) (|v_#memory_$Pointer$.offset_92| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_99| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_118|)) (= (store |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99|))) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_118|) 1) (= |#memory_int| (store |v_#memory_int_90| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_int_90| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| 3))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99|)))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_99|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3))' at error location [2023-11-06 20:56:16,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:16,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:16,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 20:56:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528058646] [2023-11-06 20:56:16,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:56:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:56:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=645, Unknown=2, NotChecked=0, Total=756 [2023-11-06 20:56:16,969 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2023-11-06 20:56:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:17,280 INFO L93 Difference]: Finished difference Result 248 states and 287 transitions. [2023-11-06 20:56:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 20:56:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 23 [2023-11-06 20:56:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:17,283 INFO L225 Difference]: With dead ends: 248 [2023-11-06 20:56:17,283 INFO L226 Difference]: Without dead ends: 248 [2023-11-06 20:56:17,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=166, Invalid=954, Unknown=2, NotChecked=0, Total=1122 [2023-11-06 20:56:17,284 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 241 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:17,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 381 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-06 20:56:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 146. [2023-11-06 20:56:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 145 states have internal predecessors, (184), 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) [2023-11-06 20:56:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2023-11-06 20:56:17,290 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 23 [2023-11-06 20:56:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:17,290 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2023-11-06 20:56:17,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2023-11-06 20:56:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2023-11-06 20:56:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:56:17,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:17,291 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:17,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 20:56:17,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 20:56:17,492 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-06 20:56:17,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1006933004, now seen corresponding path program 1 times [2023-11-06 20:56:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92718803] [2023-11-06 20:56:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:17,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92718803] [2023-11-06 20:56:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92718803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141851002] [2023-11-06 20:56:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:17,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:17,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:17,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f16d3e6-c166-4ca3-863a-41496877dc7c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:56:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:17,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 20:56:17,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:18,115 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 20:56:18,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 20:56:18,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 20:56:18,380 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-06 20:56:18,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-06 20:56:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 20:56:18,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-06 20:56:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:18,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:18,654 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_474) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2023-11-06 20:56:18,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:18,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-11-06 20:56:18,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:18,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-11-06 20:56:18,694 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 9 treesize of output 5