./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:29:02,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:29:02,997 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:29:03,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:29:03,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:29:03,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:29:03,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:29:03,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:29:03,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:29:03,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:29:03,057 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:29:03,059 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:29:03,059 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:29:03,061 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:29:03,061 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:29:03,062 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:29:03,062 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:29:03,063 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:29:03,063 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:29:03,064 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:29:03,064 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:29:03,065 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:29:03,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:29:03,066 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:29:03,067 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:29:03,067 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:29:03,067 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:29:03,068 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:29:03,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:29:03,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:29:03,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:29:03,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:29:03,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:29:03,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:29:03,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:29:03,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:29:03,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:29:03,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:29:03,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:29:03,073 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:29:03,073 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:29:03,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:29:03,074 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:29:03,074 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:29:03,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:29:03,075 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_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f [2023-11-06 20:29:03,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:29:03,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:29:03,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:29:03,412 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:29:03,412 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:29:03,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2023-11-06 20:29:06,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:29:06,934 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:29:06,935 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2023-11-06 20:29:06,959 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/data/06a333708/4f2a5f819d5345bd8a4ae8270b4b1a52/FLAG661d222a7 [2023-11-06 20:29:06,979 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/data/06a333708/4f2a5f819d5345bd8a4ae8270b4b1a52 [2023-11-06 20:29:06,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:29:06,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:29:06,991 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:29:06,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:29:06,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:29:06,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:29:06" (1/1) ... [2023-11-06 20:29:07,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ddceaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07, skipping insertion in model container [2023-11-06 20:29:07,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:29:06" (1/1) ... [2023-11-06 20:29:07,085 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:29:07,524 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2023-11-06 20:29:07,534 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2023-11-06 20:29:07,536 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2023-11-06 20:29:07,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:29:07,582 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:29:07,659 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2023-11-06 20:29:07,672 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2023-11-06 20:29:07,673 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2023-11-06 20:29:07,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:29:07,719 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:29:07,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07 WrapperNode [2023-11-06 20:29:07,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:29:07,721 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:29:07,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:29:07,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:29:07,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,781 INFO L138 Inliner]: procedures = 142, calls = 63, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 185 [2023-11-06 20:29:07,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:29:07,782 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:29:07,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:29:07,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:29:07,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,828 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:29:07,829 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:29:07,830 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:29:07,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:29:07,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (1/1) ... [2023-11-06 20:29:07,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:29:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:07,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:29:07,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:29:07,936 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-06 20:29:07,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-06 20:29:07,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2023-11-06 20:29:07,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2023-11-06 20:29:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:29:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:29:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:29:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-06 20:29:07,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-06 20:29:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:29:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:29:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:29:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2023-11-06 20:29:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2023-11-06 20:29:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:29:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-06 20:29:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-06 20:29:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:29:07,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:29:08,203 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:29:08,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:29:08,558 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:29:08,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:29:08,687 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 20:29:08,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:29:08 BoogieIcfgContainer [2023-11-06 20:29:08,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:29:08,695 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:29:08,695 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:29:08,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:29:08,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:29:06" (1/3) ... [2023-11-06 20:29:08,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e401c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:29:08, skipping insertion in model container [2023-11-06 20:29:08,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:07" (2/3) ... [2023-11-06 20:29:08,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e401c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:29:08, skipping insertion in model container [2023-11-06 20:29:08,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:29:08" (3/3) ... [2023-11-06 20:29:08,706 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-2.i [2023-11-06 20:29:08,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:29:08,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-06 20:29:08,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:29:08,807 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5eccf2fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:29:08,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 20:29:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 20:29:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:29:08,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:08,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:29:08,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:29:08,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1745544089, now seen corresponding path program 1 times [2023-11-06 20:29:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:08,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280631661] [2023-11-06 20:29:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:09,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280631661] [2023-11-06 20:29:09,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280631661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:09,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:09,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:29:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297095217] [2023-11-06 20:29:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:09,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:29:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:29:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:29:09,278 INFO L87 Difference]: Start difference. First operand has 55 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:09,561 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2023-11-06 20:29:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:29:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:29:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:09,574 INFO L225 Difference]: With dead ends: 147 [2023-11-06 20:29:09,574 INFO L226 Difference]: Without dead ends: 93 [2023-11-06 20:29:09,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:29:09,582 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:09,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-06 20:29:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2023-11-06 20:29:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 54 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 20:29:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-06 20:29:09,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 6 [2023-11-06 20:29:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:09,641 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-06 20:29:09,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-06 20:29:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:29:09,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:09,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:29:09,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:29:09,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1346504897, now seen corresponding path program 1 times [2023-11-06 20:29:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:09,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027926195] [2023-11-06 20:29:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:09,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:09,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027926195] [2023-11-06 20:29:09,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027926195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:09,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:09,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:29:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398921410] [2023-11-06 20:29:09,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:09,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:29:09,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:29:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:29:09,812 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:10,045 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2023-11-06 20:29:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:29:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-06 20:29:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:10,050 INFO L225 Difference]: With dead ends: 129 [2023-11-06 20:29:10,050 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 20:29:10,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:29:10,053 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:10,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 20:29:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-11-06 20:29:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 20:29:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-11-06 20:29:10,067 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2023-11-06 20:29:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:10,067 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-11-06 20:29:10,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-11-06 20:29:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:29:10,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:10,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:10,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:29:10,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:29:10,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1905073957, now seen corresponding path program 1 times [2023-11-06 20:29:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:10,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536193626] [2023-11-06 20:29:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:10,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:10,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536193626] [2023-11-06 20:29:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536193626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843180963] [2023-11-06 20:29:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:10,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:10,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:29:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:10,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 20:29:10,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:11,121 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 20:29:11,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 20:29:11,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 44 [2023-11-06 20:29:11,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-11-06 20:29:11,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 39 [2023-11-06 20:29:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:29:11,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 17 [2023-11-06 20:29:11,466 INFO L322 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-11-06 20:29:11,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-11-06 20:29:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:29:11,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-06 20:29:11,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 20:29:11,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-06 20:29:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 20:29:11,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2023-11-06 20:29:11,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 20:29:11,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-06 20:29:11,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 38 [2023-11-06 20:29:11,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-06 20:29:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:11,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:12,300 INFO L322 Elim1Store]: treesize reduction 17, result has 64.6 percent of original size [2023-11-06 20:29:12,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1606 treesize of output 1285 [2023-11-06 20:29:12,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:29:12,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 255 [2023-11-06 20:29:12,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2023-11-06 20:29:12,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 194 [2023-11-06 20:29:12,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-06 20:29:12,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-06 20:29:12,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 20:29:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 20:29:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:29:12,922 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 20:29:12,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 20:29:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843180963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901666616] [2023-11-06 20:29:13,097 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-06 20:29:13,098 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:13,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:13,108 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:13,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:14,945 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 96 for LOIs [2023-11-06 20:29:15,050 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 31 for LOIs [2023-11-06 20:29:15,198 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 39 for LOIs [2023-11-06 20:29:15,214 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:29:22,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '780#(and (= |~#drvlist~0.offset| 0) (<= 0 (+ |ULTIMATE.start_foo_~N~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 3)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (<= |ULTIMATE.start_foo_~N~0#1| |ULTIMATE.start_foo_~i~0#1|) (= |~#mutexes~0.base| 3) (= (+ 8 |ULTIMATE.start_foo_~me~1#1.offset|) 0) (= 4 |ULTIMATE.start_foo_~me~1#1.base|) (= |ULTIMATE.start_ldv_list_empty_#res#1| 0) (= |ULTIMATE.start_ldv_set_empty_#res#1| 0) (= |~#mutexes~0.offset| 0) (<= |ULTIMATE.start_foo_~N~0#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| 4) 0) 0) (= (select (select |#memory_$Pointer$.base| 4) 0) 4) (= 4 |~#drvlist~0.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-06 20:29:22,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:29:22,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:22,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-11-06 20:29:22,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430002712] [2023-11-06 20:29:22,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:22,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 20:29:22,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 20:29:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2138, Unknown=1, NotChecked=0, Total=2352 [2023-11-06 20:29:22,856 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 20:29:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:24,991 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2023-11-06 20:29:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 20:29:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 19 [2023-11-06 20:29:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:24,994 INFO L225 Difference]: With dead ends: 133 [2023-11-06 20:29:24,995 INFO L226 Difference]: Without dead ends: 111 [2023-11-06 20:29:24,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=421, Invalid=3610, Unknown=1, NotChecked=0, Total=4032 [2023-11-06 20:29:24,998 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 370 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 547 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 20:29:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-06 20:29:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2023-11-06 20:29:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 20:29:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2023-11-06 20:29:25,019 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 19 [2023-11-06 20:29:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:25,020 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2023-11-06 20:29:25,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 20:29:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2023-11-06 20:29:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:29:25,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:25,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:25,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:25,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:29:25,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2066537291, now seen corresponding path program 1 times [2023-11-06 20:29:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007493929] [2023-11-06 20:29:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:25,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:25,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007493929] [2023-11-06 20:29:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007493929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:25,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:29:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95942009] [2023-11-06 20:29:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:29:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:29:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:29:25,345 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 20:29:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:25,426 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2023-11-06 20:29:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:29:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-06 20:29:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:25,429 INFO L225 Difference]: With dead ends: 101 [2023-11-06 20:29:25,430 INFO L226 Difference]: Without dead ends: 99 [2023-11-06 20:29:25,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:29:25,431 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:25,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-06 20:29:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-11-06 20:29:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.303030303030303) internal successors, (86), 71 states have internal predecessors, (86), 16 states have call successors, (16), 10 states have call predecessors, (16), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-06 20:29:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2023-11-06 20:29:25,452 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 24 [2023-11-06 20:29:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:25,452 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2023-11-06 20:29:25,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 20:29:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2023-11-06 20:29:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:29:25,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:25,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:25,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:29:25,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:29:25,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash -530159726, now seen corresponding path program 1 times [2023-11-06 20:29:25,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:25,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048548747] [2023-11-06 20:29:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:27,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048548747] [2023-11-06 20:29:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048548747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113254931] [2023-11-06 20:29:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:27,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:27,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:27,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:28,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c72afee-8cb3-4cd3-840e-eb02462c47b3/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:29:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:28,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 20:29:28,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:28,433 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 20:29:28,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 20:29:29,190 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 20:29:29,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2023-11-06 20:29:29,205 INFO L322 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-06 20:29:29,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 64 [2023-11-06 20:29:29,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 20:29:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:29,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113254931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702297051] [2023-11-06 20:29:30,463 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 20:29:30,463 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:30,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:30,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:30,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:32,888 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 24 for LOIs [2023-11-06 20:29:32,895 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 105 for LOIs [2023-11-06 20:29:33,209 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 47 for LOIs [2023-11-06 20:29:33,472 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 55 for LOIs [2023-11-06 20:29:33,509 INFO L180 IcfgInterpreter]: Interpretation finished