./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe007_power.opt-thin001_power.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe007_power.opt-thin001_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6328ead9c10c029445fd051d7c6329db494c1000fb08b7313fbd69c70835e259 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:01,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:01,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:56:01,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:01,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:01,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:01,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:01,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:01,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:01,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:01,299 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:01,300 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:01,300 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:01,301 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:01,302 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:01,302 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:01,303 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:01,303 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:01,304 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:01,304 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:01,305 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:01,306 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:01,307 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:56:01,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:56:01,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:01,308 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:01,309 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:01,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:01,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:01,310 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:56:01,311 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:56:01,311 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:56:01,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:01,312 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:56:01,312 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:56:01,313 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:01,313 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:01,313 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:01,314 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:01,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:01,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:01,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:01,315 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:01,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:01,316 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:01,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:01,316 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_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6328ead9c10c029445fd051d7c6329db494c1000fb08b7313fbd69c70835e259 [2023-11-12 00:56:01,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:01,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:01,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:01,628 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:01,629 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:01,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-wmm/safe007_power.opt-thin001_power.opt.i [2023-11-12 00:56:04,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:05,196 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:05,197 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/sv-benchmarks/c/pthread-wmm/safe007_power.opt-thin001_power.opt.i [2023-11-12 00:56:05,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/data/127f825de/5063c1119b7942bfaf923d7f4c4b22ca/FLAG2e229a213 [2023-11-12 00:56:05,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/data/127f825de/5063c1119b7942bfaf923d7f4c4b22ca [2023-11-12 00:56:05,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:05,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:05,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:05,245 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:05,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:05,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:05,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca1a69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05, skipping insertion in model container [2023-11-12 00:56:05,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:05,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:05,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:05,729 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:05,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:05,888 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:56:05,888 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:56:05,921 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:05,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05 WrapperNode [2023-11-12 00:56:05,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:05,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:05,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:05,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:05,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:05,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,003 INFO L138 Inliner]: procedures = 176, calls = 72, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 187 [2023-11-12 00:56:06,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:06,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:06,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:06,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:06,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:06,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:06,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:06,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:06,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (1/1) ... [2023-11-12 00:56:06,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:06,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:06,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da74162-d6b0-49d4-a4dc-0e8b48710bad/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:56:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:56:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 00:56:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:56:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:56:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-12 00:56:06,162 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-12 00:56:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-12 00:56:06,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-12 00:56:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-12 00:56:06,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-12 00:56:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 00:56:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:06,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:06,165 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:56:06,331 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:06,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:07,040 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:07,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:07,842 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:56:07,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:07 BoogieIcfgContainer [2023-11-12 00:56:07,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:07,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:07,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:07,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:07,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:05" (1/3) ... [2023-11-12 00:56:07,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18016774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:07, skipping insertion in model container [2023-11-12 00:56:07,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:05" (2/3) ... [2023-11-12 00:56:07,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18016774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:07, skipping insertion in model container [2023-11-12 00:56:07,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:07" (3/3) ... [2023-11-12 00:56:07,860 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_power.opt-thin001_power.opt.i [2023-11-12 00:56:07,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:07,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-12 00:56:07,883 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:56:08,071 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:08,122 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:08,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 175 transitions, 362 flow [2023-11-12 00:56:08,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 175 transitions, 362 flow [2023-11-12 00:56:08,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 175 transitions, 362 flow [2023-11-12 00:56:08,299 INFO L124 PetriNetUnfolderBase]: 3/172 cut-off events. [2023-11-12 00:56:08,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:56:08,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 172 events. 3/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 232 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2023-11-12 00:56:08,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 5778 [2023-11-12 00:56:32,683 INFO L134 LiptonReduction]: Checked pairs total: 21870 [2023-11-12 00:56:32,684 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-11-12 00:56:32,700 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 67 transitions, 146 flow [2023-11-12 00:56:33,412 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15204 states, 14055 states have (on average 3.888438278192814) internal successors, (54652), 15203 states have internal predecessors, (54652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:33,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:33,452 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;@4439d70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:33,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-11-12 00:56:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 15204 states, 14055 states have (on average 3.888438278192814) internal successors, (54652), 15203 states have internal predecessors, (54652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-12 00:56:33,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:33,499 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-12 00:56:33,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:33,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1098, now seen corresponding path program 1 times [2023-11-12 00:56:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539377125] [2023-11-12 00:56:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:33,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539377125] [2023-11-12 00:56:33,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539377125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:33,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 00:56:33,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750032422] [2023-11-12 00:56:33,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:56:33,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:56:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:33,837 INFO L87 Difference]: Start difference. First operand has 15204 states, 14055 states have (on average 3.888438278192814) internal successors, (54652), 15203 states have internal predecessors, (54652), 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) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:34,169 INFO L93 Difference]: Finished difference Result 6714 states and 23324 transitions. [2023-11-12 00:56:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:56:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2023-11-12 00:56:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:34,272 INFO L225 Difference]: With dead ends: 6714 [2023-11-12 00:56:34,272 INFO L226 Difference]: Without dead ends: 6714 [2023-11-12 00:56:34,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:34,277 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:34,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2023-11-12 00:56:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 6714. [2023-11-12 00:56:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6337 states have (on average 3.68060596496765) internal successors, (23324), 6713 states have internal predecessors, (23324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 23324 transitions. [2023-11-12 00:56:34,768 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 23324 transitions. Word has length 1 [2023-11-12 00:56:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:34,769 INFO L495 AbstractCegarLoop]: Abstraction has 6714 states and 23324 transitions. [2023-11-12 00:56:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 23324 transitions. [2023-11-12 00:56:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:56:34,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:34,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:56:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:34,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:34,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2027798787, now seen corresponding path program 1 times [2023-11-12 00:56:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:34,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996052562] [2023-11-12 00:56:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:34,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:35,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996052562] [2023-11-12 00:56:35,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996052562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:35,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:35,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:35,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491761359] [2023-11-12 00:56:35,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:35,234 INFO L87 Difference]: Start difference. First operand 6714 states and 23324 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-12 00:56:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:35,506 INFO L93 Difference]: Finished difference Result 6042 states and 20920 transitions. [2023-11-12 00:56:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2023-11-12 00:56:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:35,705 INFO L225 Difference]: With dead ends: 6042 [2023-11-12 00:56:35,705 INFO L226 Difference]: Without dead ends: 6042 [2023-11-12 00:56:35,706 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 [2023-11-12 00:56:35,707 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:35,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2023-11-12 00:56:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 6042. [2023-11-12 00:56:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 5728 states have (on average 3.6522346368715084) internal successors, (20920), 6041 states have internal predecessors, (20920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 20920 transitions. [2023-11-12 00:56:36,013 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 20920 transitions. Word has length 6 [2023-11-12 00:56:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:36,014 INFO L495 AbstractCegarLoop]: Abstraction has 6042 states and 20920 transitions. [2023-11-12 00:56:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-12 00:56:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 20920 transitions. [2023-11-12 00:56:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:56:36,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:36,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:36,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:36,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1562747942, now seen corresponding path program 1 times [2023-11-12 00:56:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520116701] [2023-11-12 00:56:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:36,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520116701] [2023-11-12 00:56:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520116701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:36,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963551067] [2023-11-12 00:56:36,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:36,320 INFO L87 Difference]: Start difference. First operand 6042 states and 20920 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2023-11-12 00:56:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:36,669 INFO L93 Difference]: Finished difference Result 7638 states and 26489 transitions. [2023-11-12 00:56:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2023-11-12 00:56:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:36,748 INFO L225 Difference]: With dead ends: 7638 [2023-11-12 00:56:36,748 INFO L226 Difference]: Without dead ends: 7638 [2023-11-12 00:56:36,749 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 [2023-11-12 00:56:36,753 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:36,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2023-11-12 00:56:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 6462. [2023-11-12 00:56:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6462 states, 6164 states have (on average 3.814243997404283) internal successors, (23511), 6461 states have internal predecessors, (23511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 23511 transitions. [2023-11-12 00:56:37,197 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 23511 transitions. Word has length 7 [2023-11-12 00:56:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:37,198 INFO L495 AbstractCegarLoop]: Abstraction has 6462 states and 23511 transitions. [2023-11-12 00:56:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2023-11-12 00:56:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 23511 transitions. [2023-11-12 00:56:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:56:37,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:37,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:37,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:37,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1562747944, now seen corresponding path program 1 times [2023-11-12 00:56:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116119142] [2023-11-12 00:56:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:37,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116119142] [2023-11-12 00:56:37,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116119142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:37,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:37,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484387145] [2023-11-12 00:56:37,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:37,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:37,557 INFO L87 Difference]: Start difference. First operand 6462 states and 23511 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-12 00:56:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:37,941 INFO L93 Difference]: Finished difference Result 3938 states and 13886 transitions. [2023-11-12 00:56:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2023-11-12 00:56:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:37,968 INFO L225 Difference]: With dead ends: 3938 [2023-11-12 00:56:37,968 INFO L226 Difference]: Without dead ends: 3938 [2023-11-12 00:56:37,969 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 [2023-11-12 00:56:37,972 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:37,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:56:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2023-11-12 00:56:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3938. [2023-11-12 00:56:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3811 states have (on average 3.6436630805562844) internal successors, (13886), 3937 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13886 transitions. [2023-11-12 00:56:38,141 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13886 transitions. Word has length 7 [2023-11-12 00:56:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:38,141 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 13886 transitions. [2023-11-12 00:56:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-12 00:56:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13886 transitions. [2023-11-12 00:56:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:56:38,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:38,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:38,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:38,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:38,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1562747945, now seen corresponding path program 1 times [2023-11-12 00:56:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:38,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499625828] [2023-11-12 00:56:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:38,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:38,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:38,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499625828] [2023-11-12 00:56:38,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499625828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691102185] [2023-11-12 00:56:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:38,744 INFO L87 Difference]: Start difference. First operand 3938 states and 13886 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2023-11-12 00:56:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:39,074 INFO L93 Difference]: Finished difference Result 1910 states and 6361 transitions. [2023-11-12 00:56:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2023-11-12 00:56:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:39,089 INFO L225 Difference]: With dead ends: 1910 [2023-11-12 00:56:39,090 INFO L226 Difference]: Without dead ends: 1910 [2023-11-12 00:56:39,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:39,091 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 82 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:39,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 8 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2023-11-12 00:56:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1818. [2023-11-12 00:56:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1792 states have (on average 3.3839285714285716) internal successors, (6064), 1817 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6064 transitions. [2023-11-12 00:56:39,185 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6064 transitions. Word has length 7 [2023-11-12 00:56:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:39,186 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 6064 transitions. [2023-11-12 00:56:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2023-11-12 00:56:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6064 transitions. [2023-11-12 00:56:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:56:39,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:39,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:39,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:39,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:39,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1399785270, now seen corresponding path program 1 times [2023-11-12 00:56:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110886893] [2023-11-12 00:56:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:39,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:39,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:39,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110886893] [2023-11-12 00:56:39,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110886893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:39,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:39,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602156101] [2023-11-12 00:56:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:39,308 INFO L87 Difference]: Start difference. First operand 1818 states and 6064 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:39,448 INFO L93 Difference]: Finished difference Result 1778 states and 5922 transitions. [2023-11-12 00:56:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-12 00:56:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:39,461 INFO L225 Difference]: With dead ends: 1778 [2023-11-12 00:56:39,461 INFO L226 Difference]: Without dead ends: 1778 [2023-11-12 00:56:39,462 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 [2023-11-12 00:56:39,463 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:39,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2023-11-12 00:56:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1778. [2023-11-12 00:56:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1752 states have (on average 3.3801369863013697) internal successors, (5922), 1777 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5922 transitions. [2023-11-12 00:56:39,555 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5922 transitions. Word has length 9 [2023-11-12 00:56:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:39,555 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 5922 transitions. [2023-11-12 00:56:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5922 transitions. [2023-11-12 00:56:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:56:39,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:39,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:39,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:39,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -443735336, now seen corresponding path program 1 times [2023-11-12 00:56:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:39,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869008351] [2023-11-12 00:56:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:40,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869008351] [2023-11-12 00:56:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869008351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716691665] [2023-11-12 00:56:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:40,056 INFO L87 Difference]: Start difference. First operand 1778 states and 5922 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:40,213 INFO L93 Difference]: Finished difference Result 1698 states and 5658 transitions. [2023-11-12 00:56:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-12 00:56:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:40,224 INFO L225 Difference]: With dead ends: 1698 [2023-11-12 00:56:40,224 INFO L226 Difference]: Without dead ends: 1698 [2023-11-12 00:56:40,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:40,225 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:40,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2023-11-12 00:56:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1698. [2023-11-12 00:56:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1673 states have (on average 3.381948595337717) internal successors, (5658), 1697 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5658 transitions. [2023-11-12 00:56:40,291 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5658 transitions. Word has length 10 [2023-11-12 00:56:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:40,292 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 5658 transitions. [2023-11-12 00:56:40,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5658 transitions. [2023-11-12 00:56:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:56:40,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:40,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:40,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:56:40,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:40,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash -443735335, now seen corresponding path program 1 times [2023-11-12 00:56:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:40,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118661030] [2023-11-12 00:56:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:40,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118661030] [2023-11-12 00:56:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118661030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:40,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670897024] [2023-11-12 00:56:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:40,515 INFO L87 Difference]: Start difference. First operand 1698 states and 5658 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:40,669 INFO L93 Difference]: Finished difference Result 2114 states and 6798 transitions. [2023-11-12 00:56:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-12 00:56:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:40,683 INFO L225 Difference]: With dead ends: 2114 [2023-11-12 00:56:40,683 INFO L226 Difference]: Without dead ends: 2034 [2023-11-12 00:56:40,686 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 [2023-11-12 00:56:40,689 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:40,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 5 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-11-12 00:56:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1906. [2023-11-12 00:56:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1882 states have (on average 3.357066950053135) internal successors, (6318), 1905 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6318 transitions. [2023-11-12 00:56:40,799 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6318 transitions. Word has length 10 [2023-11-12 00:56:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:40,801 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 6318 transitions. [2023-11-12 00:56:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6318 transitions. [2023-11-12 00:56:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:56:40,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:40,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:56:40,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:40,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash -443669389, now seen corresponding path program 1 times [2023-11-12 00:56:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:40,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938003546] [2023-11-12 00:56:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:41,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:41,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938003546] [2023-11-12 00:56:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938003546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:41,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055991862] [2023-11-12 00:56:41,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:41,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:41,086 INFO L87 Difference]: Start difference. First operand 1906 states and 6318 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:41,226 INFO L93 Difference]: Finished difference Result 1881 states and 6223 transitions. [2023-11-12 00:56:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:41,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-12 00:56:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:41,238 INFO L225 Difference]: With dead ends: 1881 [2023-11-12 00:56:41,238 INFO L226 Difference]: Without dead ends: 1881 [2023-11-12 00:56:41,239 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 [2023-11-12 00:56:41,240 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:41,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 4 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-11-12 00:56:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1881. [2023-11-12 00:56:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1857 states have (on average 3.351103931071621) internal successors, (6223), 1880 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6223 transitions. [2023-11-12 00:56:41,307 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6223 transitions. Word has length 10 [2023-11-12 00:56:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:41,307 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 6223 transitions. [2023-11-12 00:56:41,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6223 transitions. [2023-11-12 00:56:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:56:41,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:41,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:56:41,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:41,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1874382643, now seen corresponding path program 1 times [2023-11-12 00:56:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689703961] [2023-11-12 00:56:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:41,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689703961] [2023-11-12 00:56:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689703961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182398385] [2023-11-12 00:56:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:41,518 INFO L87 Difference]: Start difference. First operand 1881 states and 6223 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:41,673 INFO L93 Difference]: Finished difference Result 2658 states and 8685 transitions. [2023-11-12 00:56:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-12 00:56:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:41,687 INFO L225 Difference]: With dead ends: 2658 [2023-11-12 00:56:41,688 INFO L226 Difference]: Without dead ends: 2658 [2023-11-12 00:56:41,688 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 [2023-11-12 00:56:41,689 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:41,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 4 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2023-11-12 00:56:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 1995. [2023-11-12 00:56:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1971 states have (on average 3.3313039066463723) internal successors, (6566), 1994 states have internal predecessors, (6566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6566 transitions. [2023-11-12 00:56:41,764 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6566 transitions. Word has length 11 [2023-11-12 00:56:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:41,765 INFO L495 AbstractCegarLoop]: Abstraction has 1995 states and 6566 transitions. [2023-11-12 00:56:41,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6566 transitions. [2023-11-12 00:56:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:56:41,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:56:41,767 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:41,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1164519185, now seen corresponding path program 1 times [2023-11-12 00:56:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166579557] [2023-11-12 00:56:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:42,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:42,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166579557] [2023-11-12 00:56:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166579557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:42,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151924394] [2023-11-12 00:56:42,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:42,032 INFO L87 Difference]: Start difference. First operand 1995 states and 6566 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-11-12 00:56:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:42,198 INFO L93 Difference]: Finished difference Result 1843 states and 6000 transitions. [2023-11-12 00:56:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2023-11-12 00:56:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:42,209 INFO L225 Difference]: With dead ends: 1843 [2023-11-12 00:56:42,209 INFO L226 Difference]: Without dead ends: 1843 [2023-11-12 00:56:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:42,210 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:42,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-12 00:56:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1763. [2023-11-12 00:56:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1739 states have (on average 3.291546866014951) internal successors, (5724), 1762 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5724 transitions. [2023-11-12 00:56:42,297 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5724 transitions. Word has length 12 [2023-11-12 00:56:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:42,298 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 5724 transitions. [2023-11-12 00:56:42,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-11-12 00:56:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5724 transitions. [2023-11-12 00:56:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:56:42,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:42,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:56:42,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:42,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 441466539, now seen corresponding path program 1 times [2023-11-12 00:56:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704290187] [2023-11-12 00:56:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:42,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:42,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704290187] [2023-11-12 00:56:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704290187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:42,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750224648] [2023-11-12 00:56:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:42,554 INFO L87 Difference]: Start difference. First operand 1763 states and 5724 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2023-11-12 00:56:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:42,680 INFO L93 Difference]: Finished difference Result 1754 states and 5694 transitions. [2023-11-12 00:56:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2023-11-12 00:56:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:42,690 INFO L225 Difference]: With dead ends: 1754 [2023-11-12 00:56:42,690 INFO L226 Difference]: Without dead ends: 1754 [2023-11-12 00:56:42,691 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 [2023-11-12 00:56:42,691 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:42,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2023-11-12 00:56:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1754. [2023-11-12 00:56:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1730 states have (on average 3.291329479768786) internal successors, (5694), 1753 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5694 transitions. [2023-11-12 00:56:42,752 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5694 transitions. Word has length 13 [2023-11-12 00:56:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:42,752 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 5694 transitions. [2023-11-12 00:56:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2023-11-12 00:56:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5694 transitions. [2023-11-12 00:56:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:56:42,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:42,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:42,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:56:42,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:42,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1740355926, now seen corresponding path program 1 times [2023-11-12 00:56:42,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:42,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085181668] [2023-11-12 00:56:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:43,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:43,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085181668] [2023-11-12 00:56:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085181668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:43,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:43,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:56:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727523051] [2023-11-12 00:56:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:56:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:56:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:56:43,318 INFO L87 Difference]: Start difference. First operand 1754 states and 5694 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2023-11-12 00:56:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:43,567 INFO L93 Difference]: Finished difference Result 1439 states and 4518 transitions. [2023-11-12 00:56:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2023-11-12 00:56:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:43,575 INFO L225 Difference]: With dead ends: 1439 [2023-11-12 00:56:43,575 INFO L226 Difference]: Without dead ends: 1439 [2023-11-12 00:56:43,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:43,576 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:43,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 13 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2023-11-12 00:56:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2023-11-12 00:56:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1415 states have (on average 3.192932862190813) internal successors, (4518), 1438 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4518 transitions. [2023-11-12 00:56:43,620 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4518 transitions. Word has length 13 [2023-11-12 00:56:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:43,620 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 4518 transitions. [2023-11-12 00:56:43,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2023-11-12 00:56:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4518 transitions. [2023-11-12 00:56:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:56:43,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:43,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:56:43,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:43,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 800558990, now seen corresponding path program 1 times [2023-11-12 00:56:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:43,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865368086] [2023-11-12 00:56:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:43,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865368086] [2023-11-12 00:56:43,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865368086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:43,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:43,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883365815] [2023-11-12 00:56:43,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:43,927 INFO L87 Difference]: Start difference. First operand 1439 states and 4518 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) [2023-11-12 00:56:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:44,113 INFO L93 Difference]: Finished difference Result 2080 states and 6360 transitions. [2023-11-12 00:56:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:44,114 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 [2023-11-12 00:56:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:44,124 INFO L225 Difference]: With dead ends: 2080 [2023-11-12 00:56:44,124 INFO L226 Difference]: Without dead ends: 2080 [2023-11-12 00:56:44,125 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 [2023-11-12 00:56:44,126 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 4 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2023-11-12 00:56:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1388. [2023-11-12 00:56:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1364 states have (on average 3.1818181818181817) internal successors, (4340), 1387 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4340 transitions. [2023-11-12 00:56:44,184 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4340 transitions. Word has length 14 [2023-11-12 00:56:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:44,184 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 4340 transitions. [2023-11-12 00:56:44,184 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) [2023-11-12 00:56:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4340 transitions. [2023-11-12 00:56:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:56:44,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:44,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:44,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:56:44,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:44,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1138801134, now seen corresponding path program 1 times [2023-11-12 00:56:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:44,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814076637] [2023-11-12 00:56:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:44,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814076637] [2023-11-12 00:56:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814076637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:44,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:44,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:44,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976951949] [2023-11-12 00:56:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:44,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:56:44,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:56:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:56:44,970 INFO L87 Difference]: Start difference. First operand 1388 states and 4340 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-12 00:56:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:45,504 INFO L93 Difference]: Finished difference Result 1940 states and 6065 transitions. [2023-11-12 00:56:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:56:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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 [2023-11-12 00:56:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:45,515 INFO L225 Difference]: With dead ends: 1940 [2023-11-12 00:56:45,515 INFO L226 Difference]: Without dead ends: 1844 [2023-11-12 00:56:45,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:45,516 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:45,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 37 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-11-12 00:56:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1844. [2023-11-12 00:56:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1820 states have (on average 3.1164835164835165) internal successors, (5672), 1843 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5672 transitions. [2023-11-12 00:56:45,577 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5672 transitions. Word has length 14 [2023-11-12 00:56:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 5672 transitions. [2023-11-12 00:56:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-12 00:56:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5672 transitions. [2023-11-12 00:56:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:56:45,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:45,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 00:56:45,581 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:45,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1742206648, now seen corresponding path program 1 times [2023-11-12 00:56:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:45,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871170236] [2023-11-12 00:56:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:46,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871170236] [2023-11-12 00:56:46,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871170236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:46,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205037422] [2023-11-12 00:56:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:56:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:56:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:56:46,203 INFO L87 Difference]: Start difference. First operand 1844 states and 5672 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2023-11-12 00:56:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:46,753 INFO L93 Difference]: Finished difference Result 2892 states and 8945 transitions. [2023-11-12 00:56:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:56:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 [2023-11-12 00:56:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:46,767 INFO L225 Difference]: With dead ends: 2892 [2023-11-12 00:56:46,767 INFO L226 Difference]: Without dead ends: 2820 [2023-11-12 00:56:46,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:46,768 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 85 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:46,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2023-11-12 00:56:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1723. [2023-11-12 00:56:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1699 states have (on average 3.101824602707475) internal successors, (5270), 1722 states have internal predecessors, (5270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5270 transitions. [2023-11-12 00:56:46,830 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5270 transitions. Word has length 15 [2023-11-12 00:56:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:46,830 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 5270 transitions. [2023-11-12 00:56:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2023-11-12 00:56:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5270 transitions. [2023-11-12 00:56:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:56:46,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:46,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:46,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 00:56:46,833 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:46,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1130280176, now seen corresponding path program 1 times [2023-11-12 00:56:46,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:46,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18676223] [2023-11-12 00:56:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:47,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18676223] [2023-11-12 00:56:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18676223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:47,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:47,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:56:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565742246] [2023-11-12 00:56:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:47,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:47,139 INFO L87 Difference]: Start difference. First operand 1723 states and 5270 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2023-11-12 00:56:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:47,243 INFO L93 Difference]: Finished difference Result 1122 states and 2909 transitions. [2023-11-12 00:56:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2023-11-12 00:56:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:47,248 INFO L225 Difference]: With dead ends: 1122 [2023-11-12 00:56:47,248 INFO L226 Difference]: Without dead ends: 1122 [2023-11-12 00:56:47,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:47,249 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:47,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-11-12 00:56:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2023-11-12 00:56:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1098 states have (on average 2.6493624772313296) internal successors, (2909), 1121 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2909 transitions. [2023-11-12 00:56:47,277 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2909 transitions. Word has length 15 [2023-11-12 00:56:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:47,277 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 2909 transitions. [2023-11-12 00:56:47,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2023-11-12 00:56:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2909 transitions. [2023-11-12 00:56:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:56:47,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:47,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 00:56:47,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:47,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2070038006, now seen corresponding path program 1 times [2023-11-12 00:56:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072926887] [2023-11-12 00:56:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:47,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072926887] [2023-11-12 00:56:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072926887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:47,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:47,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532831655] [2023-11-12 00:56:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:47,507 INFO L87 Difference]: Start difference. First operand 1122 states and 2909 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-12 00:56:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:47,634 INFO L93 Difference]: Finished difference Result 427 states and 910 transitions. [2023-11-12 00:56:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 [2023-11-12 00:56:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:47,636 INFO L225 Difference]: With dead ends: 427 [2023-11-12 00:56:47,636 INFO L226 Difference]: Without dead ends: 427 [2023-11-12 00:56:47,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:47,637 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:47,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2023-11-12 00:56:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2023-11-12 00:56:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 415 states have (on average 2.1927710843373496) internal successors, (910), 426 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 910 transitions. [2023-11-12 00:56:47,648 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 910 transitions. Word has length 16 [2023-11-12 00:56:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:47,649 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 910 transitions. [2023-11-12 00:56:47,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-12 00:56:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 910 transitions. [2023-11-12 00:56:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:56:47,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:47,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 00:56:47,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P1Err0ASSERT_VIOLATIONMEMORY_LEAK, P1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-12 00:56:47,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1255427785, now seen corresponding path program 1 times [2023-11-12 00:56:47,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:47,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075807220] [2023-11-12 00:56:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:49,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:49,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075807220] [2023-11-12 00:56:49,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075807220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:49,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:49,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649597112] [2023-11-12 00:56:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:49,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:56:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:56:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:56:49,719 INFO L87 Difference]: Start difference. First operand 427 states and 910 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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)