./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.06.cil.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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/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 bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:32,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:32,744 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:49:32,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:32,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:32,779 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:32,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:32,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:32,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:32,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:32,782 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:32,783 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:32,783 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:32,784 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:49:32,784 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:32,785 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:32,786 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:49:32,786 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:49:32,787 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:32,787 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:49:32,788 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:49:32,789 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:49:32,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:32,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:32,791 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:32,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:49:32,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:32,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:32,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:32,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:32,794 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:32,795 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:32,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:32,796 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:32,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:32,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:32,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:32,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:32,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:32,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:32,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:49:32,804 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:49:32,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:49:32,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:32,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:49:32,806 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:32,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:32,807 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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df [2023-11-24 23:49:33,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:33,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:33,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:33,163 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:33,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:33,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2023-11-24 23:49:36,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:36,591 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:36,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/sv-benchmarks/c/systemc/transmitter.06.cil.c [2023-11-24 23:49:36,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/data/c1510d888/374c94e9c71b4b7c959253590195622a/FLAG5660d195c [2023-11-24 23:49:36,623 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/data/c1510d888/374c94e9c71b4b7c959253590195622a [2023-11-24 23:49:36,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:36,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:36,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:36,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:36,642 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:36,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:36" (1/1) ... [2023-11-24 23:49:36,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e45ac0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:36, skipping insertion in model container [2023-11-24 23:49:36,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:36" (1/1) ... [2023-11-24 23:49:36,697 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:36,860 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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2023-11-24 23:49:36,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:36,966 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:36,982 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_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2023-11-24 23:49:37,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:37,058 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:37,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37 WrapperNode [2023-11-24 23:49:37,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:37,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:37,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:37,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:37,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,124 INFO L138 Inliner]: procedures = 40, calls = 48, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 505 [2023-11-24 23:49:37,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:37,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:37,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:37,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:37,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:37,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:37,175 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:37,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:37,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (1/1) ... [2023-11-24 23:49:37,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:37,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:37,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:49:37,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6bb1aa-4a13-48ed-8e6f-7136cc89ad25/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:49:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:49:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:49:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:49:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:49:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:49:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:49:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:49:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:49:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:49:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:49:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:49:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:49:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:49:37,293 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:49:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:49:37,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:49:37,388 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:49:37,391 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:49:38,003 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:49:38,408 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:49:38,408 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-24 23:49:38,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:38 BoogieIcfgContainer [2023-11-24 23:49:38,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:49:38,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:49:38,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:49:38,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:49:38,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:36" (1/3) ... [2023-11-24 23:49:38,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1777966d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:38, skipping insertion in model container [2023-11-24 23:49:38,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:37" (2/3) ... [2023-11-24 23:49:38,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1777966d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:38, skipping insertion in model container [2023-11-24 23:49:38,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:38" (3/3) ... [2023-11-24 23:49:38,425 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2023-11-24 23:49:38,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:49:38,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:49:38,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:49:38,533 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;@40c11244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:49:38,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:49:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 100 states have (on average 1.5) internal successors, (150), 102 states have internal predecessors, (150), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:49:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:49:38,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:38,550 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, 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 23:49:38,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:38,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1577665815, now seen corresponding path program 1 times [2023-11-24 23:49:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:38,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961040361] [2023-11-24 23:49:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:39,108 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 23:49:39,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:39,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961040361] [2023-11-24 23:49:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961040361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:39,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:39,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:49:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004412867] [2023-11-24 23:49:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:39,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:49:39,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:49:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:49:39,178 INFO L87 Difference]: Start difference. First operand has 127 states, 100 states have (on average 1.5) internal successors, (150), 102 states have internal predecessors, (150), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:39,642 INFO L93 Difference]: Finished difference Result 368 states and 553 transitions. [2023-11-24 23:49:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:49:39,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:49:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:39,665 INFO L225 Difference]: With dead ends: 368 [2023-11-24 23:49:39,666 INFO L226 Difference]: Without dead ends: 242 [2023-11-24 23:49:39,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:49:39,682 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 323 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:39,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 494 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:49:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-24 23:49:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2023-11-24 23:49:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 191 states have (on average 1.4397905759162304) internal successors, (275), 193 states have internal predecessors, (275), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-24 23:49:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 343 transitions. [2023-11-24 23:49:39,796 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 343 transitions. Word has length 53 [2023-11-24 23:49:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:39,797 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 343 transitions. [2023-11-24 23:49:39,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 343 transitions. [2023-11-24 23:49:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:49:39,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:39,809 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, 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 23:49:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:49:39,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:39,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash -818771176, now seen corresponding path program 1 times [2023-11-24 23:49:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:39,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426304114] [2023-11-24 23:49:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:40,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:40,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426304114] [2023-11-24 23:49:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426304114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:40,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296106950] [2023-11-24 23:49:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:49:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:49:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:40,034 INFO L87 Difference]: Start difference. First operand 238 states and 343 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:40,715 INFO L93 Difference]: Finished difference Result 1369 states and 2067 transitions. [2023-11-24 23:49:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:49:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:49:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:40,729 INFO L225 Difference]: With dead ends: 1369 [2023-11-24 23:49:40,729 INFO L226 Difference]: Without dead ends: 1136 [2023-11-24 23:49:40,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:40,733 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 721 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:40,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 734 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-11-24 23:49:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1100. [2023-11-24 23:49:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 897 states have (on average 1.4303232998885174) internal successors, (1283), 905 states have internal predecessors, (1283), 142 states have call successors, (142), 60 states have call predecessors, (142), 60 states have return successors, (208), 135 states have call predecessors, (208), 142 states have call successors, (208) [2023-11-24 23:49:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1633 transitions. [2023-11-24 23:49:40,850 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1633 transitions. Word has length 53 [2023-11-24 23:49:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:40,851 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1633 transitions. [2023-11-24 23:49:40,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1633 transitions. [2023-11-24 23:49:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:49:40,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:40,854 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, 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 23:49:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:49:40,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:40,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 306488793, now seen corresponding path program 1 times [2023-11-24 23:49:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:40,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430968128] [2023-11-24 23:49:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:40,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:41,033 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 23:49:41,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:41,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430968128] [2023-11-24 23:49:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430968128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:41,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426194192] [2023-11-24 23:49:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:49:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:49:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:41,037 INFO L87 Difference]: Start difference. First operand 1100 states and 1633 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:41,755 INFO L93 Difference]: Finished difference Result 4323 states and 6589 transitions. [2023-11-24 23:49:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:49:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:49:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:41,793 INFO L225 Difference]: With dead ends: 4323 [2023-11-24 23:49:41,793 INFO L226 Difference]: Without dead ends: 3228 [2023-11-24 23:49:41,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:41,805 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 722 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:41,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 743 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2023-11-24 23:49:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2982. [2023-11-24 23:49:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2485 states have (on average 1.4402414486921529) internal successors, (3579), 2475 states have internal predecessors, (3579), 332 states have call successors, (332), 148 states have call predecessors, (332), 164 states have return successors, (610), 359 states have call predecessors, (610), 332 states have call successors, (610) [2023-11-24 23:49:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4521 transitions. [2023-11-24 23:49:42,067 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4521 transitions. Word has length 53 [2023-11-24 23:49:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:42,068 INFO L495 AbstractCegarLoop]: Abstraction has 2982 states and 4521 transitions. [2023-11-24 23:49:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4521 transitions. [2023-11-24 23:49:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:49:42,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:42,071 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, 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 23:49:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:49:42,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:42,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1322161480, now seen corresponding path program 1 times [2023-11-24 23:49:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268521020] [2023-11-24 23:49:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:42,244 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 23:49:42,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268521020] [2023-11-24 23:49:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268521020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:42,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:42,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236243431] [2023-11-24 23:49:42,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:42,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:49:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:49:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:42,247 INFO L87 Difference]: Start difference. First operand 2982 states and 4521 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:43,278 INFO L93 Difference]: Finished difference Result 10951 states and 17131 transitions. [2023-11-24 23:49:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:49:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:49:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:43,351 INFO L225 Difference]: With dead ends: 10951 [2023-11-24 23:49:43,352 INFO L226 Difference]: Without dead ends: 7974 [2023-11-24 23:49:43,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:43,369 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 717 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:43,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 736 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7974 states. [2023-11-24 23:49:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7974 to 7426. [2023-11-24 23:49:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 6251 states have (on average 1.4485682290833466) internal successors, (9055), 6187 states have internal predecessors, (9055), 754 states have call successors, (754), 348 states have call predecessors, (754), 420 states have return successors, (1694), 891 states have call predecessors, (1694), 754 states have call successors, (1694) [2023-11-24 23:49:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 11503 transitions. [2023-11-24 23:49:43,950 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 11503 transitions. Word has length 53 [2023-11-24 23:49:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 7426 states and 11503 transitions. [2023-11-24 23:49:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 11503 transitions. [2023-11-24 23:49:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:49:43,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:43,953 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, 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 23:49:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:49:43,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:43,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1630600489, now seen corresponding path program 1 times [2023-11-24 23:49:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076767331] [2023-11-24 23:49:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:44,292 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 23:49:44,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076767331] [2023-11-24 23:49:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076767331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877008794] [2023-11-24 23:49:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:44,295 INFO L87 Difference]: Start difference. First operand 7426 states and 11503 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:45,350 INFO L93 Difference]: Finished difference Result 20195 states and 31388 transitions. [2023-11-24 23:49:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:49:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:49:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:45,506 INFO L225 Difference]: With dead ends: 20195 [2023-11-24 23:49:45,506 INFO L226 Difference]: Without dead ends: 12775 [2023-11-24 23:49:45,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:49:45,534 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 503 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:45,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 405 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:49:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2023-11-24 23:49:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 11888. [2023-11-24 23:49:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11888 states, 10046 states have (on average 1.434700378260004) internal successors, (14413), 9965 states have internal predecessors, (14413), 1129 states have call successors, (1129), 568 states have call predecessors, (1129), 712 states have return successors, (2539), 1355 states have call predecessors, (2539), 1129 states have call successors, (2539) [2023-11-24 23:49:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11888 states to 11888 states and 18081 transitions. [2023-11-24 23:49:46,552 INFO L78 Accepts]: Start accepts. Automaton has 11888 states and 18081 transitions. Word has length 53 [2023-11-24 23:49:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:46,553 INFO L495 AbstractCegarLoop]: Abstraction has 11888 states and 18081 transitions. [2023-11-24 23:49:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11888 states and 18081 transitions. [2023-11-24 23:49:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:49:46,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:46,557 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, 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 23:49:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:49:46,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:46,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1813526203, now seen corresponding path program 1 times [2023-11-24 23:49:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:46,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742845100] [2023-11-24 23:49:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:46,802 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 23:49:46,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:46,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742845100] [2023-11-24 23:49:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742845100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:46,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584816153] [2023-11-24 23:49:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:46,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:46,812 INFO L87 Difference]: Start difference. First operand 11888 states and 18081 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:48,629 INFO L93 Difference]: Finished difference Result 34885 states and 53305 transitions. [2023-11-24 23:49:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:49:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-24 23:49:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:48,749 INFO L225 Difference]: With dead ends: 34885 [2023-11-24 23:49:48,749 INFO L226 Difference]: Without dead ends: 23003 [2023-11-24 23:49:48,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:49:48,795 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 461 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:48,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 538 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:49:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23003 states. [2023-11-24 23:49:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23003 to 21229. [2023-11-24 23:49:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21229 states, 17964 states have (on average 1.4320863950122467) internal successors, (25726), 17777 states have internal predecessors, (25726), 1972 states have call successors, (1972), 996 states have call predecessors, (1972), 1292 states have return successors, (4675), 2456 states have call predecessors, (4675), 1972 states have call successors, (4675) [2023-11-24 23:49:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21229 states to 21229 states and 32373 transitions. [2023-11-24 23:49:50,496 INFO L78 Accepts]: Start accepts. Automaton has 21229 states and 32373 transitions. Word has length 55 [2023-11-24 23:49:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:50,497 INFO L495 AbstractCegarLoop]: Abstraction has 21229 states and 32373 transitions. [2023-11-24 23:49:50,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21229 states and 32373 transitions. [2023-11-24 23:49:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:49:50,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:50,502 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, 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 23:49:50,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:49:50,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:50,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:50,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1176561674, now seen corresponding path program 1 times [2023-11-24 23:49:50,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:50,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230192921] [2023-11-24 23:49:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:50,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:50,769 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 23:49:50,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230192921] [2023-11-24 23:49:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230192921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:50,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:50,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112796740] [2023-11-24 23:49:50,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:50,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:50,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:50,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:50,773 INFO L87 Difference]: Start difference. First operand 21229 states and 32373 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:52,990 INFO L93 Difference]: Finished difference Result 56759 states and 87725 transitions. [2023-11-24 23:49:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:49:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-24 23:49:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:53,168 INFO L225 Difference]: With dead ends: 56759 [2023-11-24 23:49:53,168 INFO L226 Difference]: Without dead ends: 35536 [2023-11-24 23:49:53,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:49:53,221 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 471 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:53,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 401 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:49:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35536 states. [2023-11-24 23:49:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35536 to 33726. [2023-11-24 23:49:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33726 states, 28548 states have (on average 1.4251085890430153) internal successors, (40684), 28361 states have internal predecessors, (40684), 3157 states have call successors, (3157), 1644 states have call predecessors, (3157), 2020 states have return successors, (7489), 3721 states have call predecessors, (7489), 3157 states have call successors, (7489) [2023-11-24 23:49:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33726 states to 33726 states and 51330 transitions. [2023-11-24 23:49:55,935 INFO L78 Accepts]: Start accepts. Automaton has 33726 states and 51330 transitions. Word has length 57 [2023-11-24 23:49:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:55,936 INFO L495 AbstractCegarLoop]: Abstraction has 33726 states and 51330 transitions. [2023-11-24 23:49:55,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:49:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33726 states and 51330 transitions. [2023-11-24 23:49:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-24 23:49:55,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:55,938 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, 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 23:49:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:49:55,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:55,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1498653391, now seen corresponding path program 1 times [2023-11-24 23:49:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200201595] [2023-11-24 23:49:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:56,232 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 23:49:56,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200201595] [2023-11-24 23:49:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200201595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:56,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619041580] [2023-11-24 23:49:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:56,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:56,236 INFO L87 Difference]: Start difference. First operand 33726 states and 51330 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:50:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:00,479 INFO L93 Difference]: Finished difference Result 104456 states and 161506 transitions. [2023-11-24 23:50:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:50:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2023-11-24 23:50:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:01,009 INFO L225 Difference]: With dead ends: 104456 [2023-11-24 23:50:01,010 INFO L226 Difference]: Without dead ends: 70736 [2023-11-24 23:50:01,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:50:01,095 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 474 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:01,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 381 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:50:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70736 states. [2023-11-24 23:50:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70736 to 65266. [2023-11-24 23:50:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65266 states, 55175 states have (on average 1.4120706841866788) internal successors, (77911), 54938 states have internal predecessors, (77911), 6096 states have call successors, (6096), 3272 states have call predecessors, (6096), 3994 states have return successors, (14021), 7056 states have call predecessors, (14021), 6096 states have call successors, (14021) [2023-11-24 23:50:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65266 states to 65266 states and 98028 transitions. [2023-11-24 23:50:06,119 INFO L78 Accepts]: Start accepts. Automaton has 65266 states and 98028 transitions. Word has length 59 [2023-11-24 23:50:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:06,120 INFO L495 AbstractCegarLoop]: Abstraction has 65266 states and 98028 transitions. [2023-11-24 23:50:06,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:50:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 65266 states and 98028 transitions. [2023-11-24 23:50:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 23:50:06,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:06,123 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, 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 23:50:06,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:50:06,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:06,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2103061834, now seen corresponding path program 1 times [2023-11-24 23:50:06,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:06,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143830982] [2023-11-24 23:50:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:06,290 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 23:50:06,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143830982] [2023-11-24 23:50:06,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143830982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:06,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:06,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:50:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451179701] [2023-11-24 23:50:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:50:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:50:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:50:06,293 INFO L87 Difference]: Start difference. First operand 65266 states and 98028 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:50:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:12,676 INFO L93 Difference]: Finished difference Result 170578 states and 256107 transitions. [2023-11-24 23:50:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:50:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 23:50:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:13,205 INFO L225 Difference]: With dead ends: 170578 [2023-11-24 23:50:13,205 INFO L226 Difference]: Without dead ends: 105318 [2023-11-24 23:50:13,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:50:13,547 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 466 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:13,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 428 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:50:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105318 states. [2023-11-24 23:50:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105318 to 105300. [2023-11-24 23:50:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105300 states, 88937 states have (on average 1.400125931839392) internal successors, (124523), 88796 states have internal predecessors, (124523), 9944 states have call successors, (9944), 5512 states have call predecessors, (9944), 6418 states have return successors, (22837), 10992 states have call predecessors, (22837), 9944 states have call successors, (22837) [2023-11-24 23:50:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105300 states to 105300 states and 157304 transitions. [2023-11-24 23:50:21,047 INFO L78 Accepts]: Start accepts. Automaton has 105300 states and 157304 transitions. Word has length 61 [2023-11-24 23:50:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:21,048 INFO L495 AbstractCegarLoop]: Abstraction has 105300 states and 157304 transitions. [2023-11-24 23:50:21,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:50:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 105300 states and 157304 transitions. [2023-11-24 23:50:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-24 23:50:21,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:21,050 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, 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, 1] [2023-11-24 23:50:21,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:50:21,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:21,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash 209961157, now seen corresponding path program 1 times [2023-11-24 23:50:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:21,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758065673] [2023-11-24 23:50:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:21,110 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 23:50:21,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758065673] [2023-11-24 23:50:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758065673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:21,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:50:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162736449] [2023-11-24 23:50:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:21,113 INFO L87 Difference]: Start difference. First operand 105300 states and 157304 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5)