./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 35b23af90f01e46e9f818578c532dc01a817e343291a24c8592db5f0da05a3c7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:13:50,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:13:50,619 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:13:50,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:13:50,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:13:50,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:13:50,653 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:13:50,654 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:13:50,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:13:50,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:13:50,656 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:13:50,656 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:13:50,657 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:13:50,658 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:13:50,658 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:13:50,659 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:13:50,660 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:13:50,660 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:13:50,661 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:13:50,662 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:13:50,662 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:13:50,663 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:13:50,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:13:50,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:13:50,666 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:13:50,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:13:50,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:13:50,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:13:50,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:13:50,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:13:50,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:13:50,670 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:13:50,671 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:13:50,672 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:13:50,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:13:50,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:13:50,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:13:50,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:13:50,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:13:50,676 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:13:50,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:13:50,677 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:13:50,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:13:50,678 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:13:50,678 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:13:50,678 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:13:50,679 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:13:50,679 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_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35b23af90f01e46e9f818578c532dc01a817e343291a24c8592db5f0da05a3c7 [2023-11-24 23:13:50,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:13:51,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:13:51,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:13:51,017 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:13:51,017 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:13:51,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c [2023-11-24 23:13:54,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:13:54,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:13:54,368 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c [2023-11-24 23:13:54,390 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/data/c8170ea4a/d9e56cbb00264addb345adb415193797/FLAG722b0cc17 [2023-11-24 23:13:54,403 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/data/c8170ea4a/d9e56cbb00264addb345adb415193797 [2023-11-24 23:13:54,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:13:54,408 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:13:54,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:13:54,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:13:54,416 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:13:54,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbc2aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54, skipping insertion in model container [2023-11-24 23:13:54,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:13:54,752 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_52ec5bd3-6a98-4f09-a4df-97c905d81855/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c[12042,12055] [2023-11-24 23:13:54,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:13:54,768 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:13:54,829 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_52ec5bd3-6a98-4f09-a4df-97c905d81855/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c[12042,12055] [2023-11-24 23:13:54,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:13:54,852 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:13:54,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54 WrapperNode [2023-11-24 23:13:54,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:13:54,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:13:54,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:13:54,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:13:54,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,935 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 414 [2023-11-24 23:13:54,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:13:54,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:13:54,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:13:54,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:13:54,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,955 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:54,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:55,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:55,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:55,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:55,023 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:13:55,024 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:13:55,024 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:13:55,024 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:13:55,025 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (1/1) ... [2023-11-24 23:13:55,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:13:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:13:55,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:13:55,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2023-11-24 23:13:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2023-11-24 23:13:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-11-24 23:13:55,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-11-24 23:13:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2023-11-24 23:13:55,178 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2023-11-24 23:13:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2023-11-24 23:13:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2023-11-24 23:13:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2023-11-24 23:13:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2023-11-24 23:13:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:13:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:13:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:13:55,337 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:13:55,339 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:13:55,930 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:13:56,131 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:13:56,131 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:13:56,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:13:56 BoogieIcfgContainer [2023-11-24 23:13:56,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:13:56,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:13:56,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:13:56,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:13:56,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:13:54" (1/3) ... [2023-11-24 23:13:56,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f47ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:13:56, skipping insertion in model container [2023-11-24 23:13:56,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:13:54" (2/3) ... [2023-11-24 23:13:56,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f47ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:13:56, skipping insertion in model container [2023-11-24 23:13:56,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:13:56" (3/3) ... [2023-11-24 23:13:56,151 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c [2023-11-24 23:13:56,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:13:56,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:13:56,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:13:56,243 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=LoopHeads, 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;@3dbe506e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:13:56,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:13:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 92 states have (on average 1.5) internal successors, (138), 96 states have internal predecessors, (138), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-24 23:13:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:13:56,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:56,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:13:56,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:56,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1464316671, now seen corresponding path program 1 times [2023-11-24 23:13:56,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:56,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502747260] [2023-11-24 23:13:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:56,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502747260] [2023-11-24 23:13:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502747260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:13:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:13:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:13:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257914287] [2023-11-24 23:13:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:13:56,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:13:56,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:13:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:13:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:13:56,655 INFO L87 Difference]: Start difference. First operand has 131 states, 92 states have (on average 1.5) internal successors, (138), 96 states have internal predecessors, (138), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:13:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:13:56,858 INFO L93 Difference]: Finished difference Result 266 states and 444 transitions. [2023-11-24 23:13:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:13:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 23:13:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:13:56,874 INFO L225 Difference]: With dead ends: 266 [2023-11-24 23:13:56,874 INFO L226 Difference]: Without dead ends: 136 [2023-11-24 23:13:56,883 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 [2023-11-24 23:13:56,890 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 6 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:13:56,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 522 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:13:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-24 23:13:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2023-11-24 23:13:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.4631578947368422) internal successors, (139), 98 states have internal predecessors, (139), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-24 23:13:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2023-11-24 23:13:56,991 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 14 [2023-11-24 23:13:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:13:56,993 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2023-11-24 23:13:56,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:13:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2023-11-24 23:13:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:13:56,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:56,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:13:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:13:56,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:57,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1895232951, now seen corresponding path program 1 times [2023-11-24 23:13:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:57,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268767298] [2023-11-24 23:13:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:57,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268767298] [2023-11-24 23:13:57,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268767298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:13:57,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:13:57,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:13:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766639775] [2023-11-24 23:13:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:13:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:13:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:13:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:13:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:13:57,138 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:13:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:13:57,285 INFO L93 Difference]: Finished difference Result 280 states and 428 transitions. [2023-11-24 23:13:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:13:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 23:13:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:13:57,290 INFO L225 Difference]: With dead ends: 280 [2023-11-24 23:13:57,290 INFO L226 Difference]: Without dead ends: 148 [2023-11-24 23:13:57,293 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 [2023-11-24 23:13:57,295 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 22 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:13:57,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 532 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:13:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-24 23:13:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2023-11-24 23:13:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 108 states have internal predecessors, (152), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:13:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 218 transitions. [2023-11-24 23:13:57,321 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 218 transitions. Word has length 15 [2023-11-24 23:13:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:13:57,321 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 218 transitions. [2023-11-24 23:13:57,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:13:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 218 transitions. [2023-11-24 23:13:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:13:57,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:57,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:13:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:13:57,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:57,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 44164285, now seen corresponding path program 1 times [2023-11-24 23:13:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:57,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354422786] [2023-11-24 23:13:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:57,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354422786] [2023-11-24 23:13:57,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354422786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:13:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:13:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:13:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487041991] [2023-11-24 23:13:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:13:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:13:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:13:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:13:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:13:57,407 INFO L87 Difference]: Start difference. First operand 146 states and 218 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:13:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:13:57,494 INFO L93 Difference]: Finished difference Result 312 states and 474 transitions. [2023-11-24 23:13:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:13:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-24 23:13:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:13:57,499 INFO L225 Difference]: With dead ends: 312 [2023-11-24 23:13:57,499 INFO L226 Difference]: Without dead ends: 175 [2023-11-24 23:13:57,502 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 [2023-11-24 23:13:57,503 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 22 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:13:57,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 361 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:13:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-24 23:13:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2023-11-24 23:13:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.439252336448598) internal successors, (154), 110 states have internal predecessors, (154), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:13:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 220 transitions. [2023-11-24 23:13:57,531 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 220 transitions. Word has length 19 [2023-11-24 23:13:57,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:13:57,531 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 220 transitions. [2023-11-24 23:13:57,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:13:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 220 transitions. [2023-11-24 23:13:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 23:13:57,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:57,534 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, 1, 1] [2023-11-24 23:13:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:13:57,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -762546577, now seen corresponding path program 1 times [2023-11-24 23:13:57,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:57,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18250608] [2023-11-24 23:13:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:57,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:57,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18250608] [2023-11-24 23:13:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18250608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:13:57,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:13:57,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:13:57,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561157527] [2023-11-24 23:13:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:13:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:13:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:13:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:13:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:13:57,617 INFO L87 Difference]: Start difference. First operand 148 states and 220 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:13:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:13:57,714 INFO L93 Difference]: Finished difference Result 249 states and 371 transitions. [2023-11-24 23:13:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:13:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-24 23:13:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:13:57,718 INFO L225 Difference]: With dead ends: 249 [2023-11-24 23:13:57,718 INFO L226 Difference]: Without dead ends: 148 [2023-11-24 23:13:57,719 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 [2023-11-24 23:13:57,721 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:13:57,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 361 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:13:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-24 23:13:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-11-24 23:13:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.411214953271028) internal successors, (151), 110 states have internal predecessors, (151), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:13:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2023-11-24 23:13:57,739 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 27 [2023-11-24 23:13:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:13:57,739 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2023-11-24 23:13:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:13:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2023-11-24 23:13:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:13:57,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:57,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:13:57,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:13:57,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:57,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash -375323738, now seen corresponding path program 1 times [2023-11-24 23:13:57,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:57,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459419777] [2023-11-24 23:13:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:57,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:57,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:57,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459419777] [2023-11-24 23:13:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459419777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:13:57,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:13:57,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:13:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904899705] [2023-11-24 23:13:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:13:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:13:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:13:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:13:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:13:57,849 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:13:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:13:57,943 INFO L93 Difference]: Finished difference Result 288 states and 425 transitions. [2023-11-24 23:13:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:13:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-24 23:13:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:13:57,946 INFO L225 Difference]: With dead ends: 288 [2023-11-24 23:13:57,946 INFO L226 Difference]: Without dead ends: 150 [2023-11-24 23:13:57,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:13:57,948 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 0 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:13:57,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 711 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:13:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-24 23:13:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2023-11-24 23:13:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.4018691588785046) internal successors, (150), 110 states have internal predecessors, (150), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:13:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 216 transitions. [2023-11-24 23:13:57,964 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 216 transitions. Word has length 30 [2023-11-24 23:13:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:13:57,965 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 216 transitions. [2023-11-24 23:13:57,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:13:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 216 transitions. [2023-11-24 23:13:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:13:57,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:13:57,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:13:57,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:13:57,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:13:57,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:13:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1996534985, now seen corresponding path program 1 times [2023-11-24 23:13:57,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:13:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036500714] [2023-11-24 23:13:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:57,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:13:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:58,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:13:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036500714] [2023-11-24 23:13:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036500714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:13:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725267579] [2023-11-24 23:13:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:13:58,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:13:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:13:58,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:13:58,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:13:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:13:58,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:13:58,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:13:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:58,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:13:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:13:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725267579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:13:58,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114751257] [2023-11-24 23:13:58,263 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-24 23:13:58,263 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:13:58,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:13:58,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:13:58,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:13:59,317 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 88 for LOIs [2023-11-24 23:14:02,473 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 105 for LOIs [2023-11-24 23:14:03,050 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:14:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2114751257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:06,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:14:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 21 [2023-11-24 23:14:06,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747503638] [2023-11-24 23:14:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 23:14:06,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 23:14:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:14:06,655 INFO L87 Difference]: Start difference. First operand 148 states and 216 transitions. Second operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:14:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:10,785 INFO L93 Difference]: Finished difference Result 313 states and 455 transitions. [2023-11-24 23:14:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:14:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-24 23:14:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:10,798 INFO L225 Difference]: With dead ends: 313 [2023-11-24 23:14:10,798 INFO L226 Difference]: Without dead ends: 168 [2023-11-24 23:14:10,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-11-24 23:14:10,808 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 50 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:10,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1410 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 23:14:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-24 23:14:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2023-11-24 23:14:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 122 states have internal predecessors, (164), 34 states have call successors, (34), 9 states have call predecessors, (34), 9 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-24 23:14:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 232 transitions. [2023-11-24 23:14:10,840 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 232 transitions. Word has length 32 [2023-11-24 23:14:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:10,841 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 232 transitions. [2023-11-24 23:14:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:14:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 232 transitions. [2023-11-24 23:14:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:14:10,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:10,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:10,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:14:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:14:11,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:11,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -453306328, now seen corresponding path program 1 times [2023-11-24 23:14:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:11,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159770972] [2023-11-24 23:14:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:11,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:14:11,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159770972] [2023-11-24 23:14:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159770972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:14:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216472732] [2023-11-24 23:14:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:11,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:11,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:11,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:11,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:14:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:11,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:14:11,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:14:11,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:14:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:14:11,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216472732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:14:11,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119071397] [2023-11-24 23:14:11,303 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-24 23:14:11,304 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:14:11,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:14:11,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:14:11,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:14:11,921 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 93 for LOIs [2023-11-24 23:14:14,275 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 108 for LOIs [2023-11-24 23:14:14,737 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:14:18,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2119071397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:18,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:14:18,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 21 [2023-11-24 23:14:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770005497] [2023-11-24 23:14:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:18,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:14:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:14:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:14:18,147 INFO L87 Difference]: Start difference. First operand 163 states and 232 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:14:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:21,844 INFO L93 Difference]: Finished difference Result 332 states and 480 transitions. [2023-11-24 23:14:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 23:14:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-24 23:14:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:21,848 INFO L225 Difference]: With dead ends: 332 [2023-11-24 23:14:21,848 INFO L226 Difference]: Without dead ends: 172 [2023-11-24 23:14:21,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 23:14:21,858 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:21,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1195 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:14:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-24 23:14:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2023-11-24 23:14:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 118 states have (on average 1.3559322033898304) internal successors, (160), 121 states have internal predecessors, (160), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:14:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 226 transitions. [2023-11-24 23:14:21,883 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 226 transitions. Word has length 32 [2023-11-24 23:14:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:21,884 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 226 transitions. [2023-11-24 23:14:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:14:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 226 transitions. [2023-11-24 23:14:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:14:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:21,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:21,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:14:22,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:22,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:22,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash 917072547, now seen corresponding path program 1 times [2023-11-24 23:14:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:22,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787942769] [2023-11-24 23:14:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:14:22,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787942769] [2023-11-24 23:14:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787942769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:14:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261551279] [2023-11-24 23:14:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:22,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:14:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:22,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:14:22,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:14:22,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:14:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:14:22,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261551279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:14:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878814571] [2023-11-24 23:14:22,362 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-11-24 23:14:22,362 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:14:22,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:14:22,363 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:14:22,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:14:22,974 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 88 for LOIs [2023-11-24 23:14:24,382 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 88 for LOIs [2023-11-24 23:14:24,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:14:29,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1878814571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:14:29,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2023-11-24 23:14:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142212408] [2023-11-24 23:14:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 23:14:29,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 23:14:29,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:14:29,147 INFO L87 Difference]: Start difference. First operand 162 states and 226 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:14:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:32,992 INFO L93 Difference]: Finished difference Result 310 states and 436 transitions. [2023-11-24 23:14:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:14:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-11-24 23:14:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:32,995 INFO L225 Difference]: With dead ends: 310 [2023-11-24 23:14:32,995 INFO L226 Difference]: Without dead ends: 176 [2023-11-24 23:14:32,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:14:32,998 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 46 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:32,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1650 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 23:14:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-24 23:14:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2023-11-24 23:14:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 126 states have (on average 1.3333333333333333) internal successors, (168), 129 states have internal predecessors, (168), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-24 23:14:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 236 transitions. [2023-11-24 23:14:33,024 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 236 transitions. Word has length 49 [2023-11-24 23:14:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:33,024 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 236 transitions. [2023-11-24 23:14:33,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:14:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 236 transitions. [2023-11-24 23:14:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:14:33,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:33,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:33,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:14:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:14:33,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:33,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash -948211980, now seen corresponding path program 1 times [2023-11-24 23:14:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:33,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703775072] [2023-11-24 23:14:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:14:33,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703775072] [2023-11-24 23:14:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703775072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:14:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29882535] [2023-11-24 23:14:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:33,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:33,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:33,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:33,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:14:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:33,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:14:33,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:14:33,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:14:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:14:33,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29882535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:14:33,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122277669] [2023-11-24 23:14:33,478 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-11-24 23:14:33,478 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:14:33,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:14:33,479 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:14:33,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:14:34,106 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2023-11-24 23:14:35,654 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2023-11-24 23:14:35,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:14:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [122277669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:14:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 26 [2023-11-24 23:14:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226763856] [2023-11-24 23:14:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:14:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:14:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:14:39,612 INFO L87 Difference]: Start difference. First operand 172 states and 236 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 17 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:14:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:42,736 INFO L93 Difference]: Finished difference Result 354 states and 497 transitions. [2023-11-24 23:14:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-24 23:14:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 17 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-24 23:14:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:42,740 INFO L225 Difference]: With dead ends: 354 [2023-11-24 23:14:42,741 INFO L226 Difference]: Without dead ends: 224 [2023-11-24 23:14:42,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 23:14:42,744 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 93 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:42,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 907 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 23:14:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-24 23:14:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 201. [2023-11-24 23:14:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 151 states have (on average 1.3178807947019868) internal successors, (199), 154 states have internal predecessors, (199), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-24 23:14:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 271 transitions. [2023-11-24 23:14:42,779 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 271 transitions. Word has length 51 [2023-11-24 23:14:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:42,780 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 271 transitions. [2023-11-24 23:14:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 17 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:14:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 271 transitions. [2023-11-24 23:14:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:14:42,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:42,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:42,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 23:14:42,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:14:42,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:42,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2025743121, now seen corresponding path program 1 times [2023-11-24 23:14:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202203706] [2023-11-24 23:14:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:14:43,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202203706] [2023-11-24 23:14:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202203706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:14:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480105367] [2023-11-24 23:14:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:43,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:43,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:43,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ec5bd3-6a98-4f09-a4df-97c905d81855/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:14:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:43,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:14:43,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:14:43,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:14:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:14:43,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480105367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:14:43,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458457712] [2023-11-24 23:14:43,258 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-24 23:14:43,259 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:14:43,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:14:43,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:14:43,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:14:43,795 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs