./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.09.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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/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 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:21:15,954 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:21:16,052 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:21:16,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:21:16,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:21:16,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:21:16,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:21:16,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:21:16,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:21:16,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:21:16,093 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:21:16,094 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:21:16,095 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:21:16,095 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:21:16,096 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:21:16,097 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:21:16,097 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:21:16,098 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:21:16,098 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:21:16,099 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:21:16,099 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:21:16,100 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:21:16,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:21:16,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:21:16,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:21:16,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:21:16,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:21:16,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:21:16,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:21:16,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:21:16,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:21:16,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:21:16,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:21:16,108 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:21:16,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:21:16,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:21:16,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:21:16,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:16,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:21:16,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:21:16,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:21:16,111 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:21:16,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:21:16,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:21:16,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:21:16,112 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:21:16,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:21:16,113 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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 [2023-11-24 23:21:16,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:21:16,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:21:16,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:21:16,483 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:21:16,484 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:21:16,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/systemc/transmitter.09.cil.c [2023-11-24 23:21:19,749 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:21:19,996 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:21:19,997 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/sv-benchmarks/c/systemc/transmitter.09.cil.c [2023-11-24 23:21:20,013 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/data/9a676d802/2e94771279734589a33c99c17fdfc919/FLAG30627a638 [2023-11-24 23:21:20,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/data/9a676d802/2e94771279734589a33c99c17fdfc919 [2023-11-24 23:21:20,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:21:20,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:21:20,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:20,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:21:20,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:21:20,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595ee72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20, skipping insertion in model container [2023-11-24 23:21:20,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,094 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:21:20,314 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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2023-11-24 23:21:20,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:20,566 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:21:20,581 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_b4a8004b-03a1-4394-aa8c-53734fed7c6e/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2023-11-24 23:21:20,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:20,729 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:21:20,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20 WrapperNode [2023-11-24 23:21:20,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:20,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:20,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:21:20,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:21:20,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,815 INFO L138 Inliner]: procedures = 46, calls = 57, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 682 [2023-11-24 23:21:20,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:20,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:21:20,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:21:20,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:21:20,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,848 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,864 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:21:20,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:21:20,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:21:20,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:21:20,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (1/1) ... [2023-11-24 23:21:20,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:20,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:21:20,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a8004b-03a1-4394-aa8c-53734fed7c6e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:21:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:21:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:21:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:21:20,994 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:21:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:21:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:21:20,995 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:21:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:21:20,995 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:21:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:21:20,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:21:20,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:21:20,998 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:21:20,998 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:21:20,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:21:20,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:21:21,148 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:21:21,151 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:21:21,982 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:21:22,587 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:21:22,587 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-24 23:21:22,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:22 BoogieIcfgContainer [2023-11-24 23:21:22,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:21:22,596 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:21:22,596 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:21:22,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:21:22,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:21:20" (1/3) ... [2023-11-24 23:21:22,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231b1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:22, skipping insertion in model container [2023-11-24 23:21:22,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:20" (2/3) ... [2023-11-24 23:21:22,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231b1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:22, skipping insertion in model container [2023-11-24 23:21:22,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:22" (3/3) ... [2023-11-24 23:21:22,606 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.09.cil.c [2023-11-24 23:21:22,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:21:22,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:21:22,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:21:22,715 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;@31d3acc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:21:22,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:21:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-24 23:21:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:22,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:22,746 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, 1, 1] [2023-11-24 23:21:22,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:22,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1545093313, now seen corresponding path program 1 times [2023-11-24 23:21:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402890724] [2023-11-24 23:21:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:23,378 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 23:21:23,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:23,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402890724] [2023-11-24 23:21:23,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402890724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:23,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:23,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:21:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919197747] [2023-11-24 23:21:23,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:23,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:23,438 INFO L87 Difference]: Start difference. First operand has 163 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 23:21:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:24,031 INFO L93 Difference]: Finished difference Result 476 states and 727 transitions. [2023-11-24 23:21:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:24,049 INFO L225 Difference]: With dead ends: 476 [2023-11-24 23:21:24,049 INFO L226 Difference]: Without dead ends: 314 [2023-11-24 23:21:24,056 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 23:21:24,060 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 428 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:24,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 674 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:21:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-24 23:21:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2023-11-24 23:21:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 257 states have (on average 1.4669260700389104) internal successors, (377), 259 states have internal predecessors, (377), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-24 23:21:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 457 transitions. [2023-11-24 23:21:24,143 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 457 transitions. Word has length 65 [2023-11-24 23:21:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:24,144 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 457 transitions. [2023-11-24 23:21:24,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 23:21:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 457 transitions. [2023-11-24 23:21:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:24,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:24,149 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, 1, 1] [2023-11-24 23:21:24,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:21:24,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:24,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1641745344, now seen corresponding path program 1 times [2023-11-24 23:21:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677022751] [2023-11-24 23:21:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:24,396 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 23:21:24,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:24,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677022751] [2023-11-24 23:21:24,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677022751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:24,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:24,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:24,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007169416] [2023-11-24 23:21:24,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:24,402 INFO L87 Difference]: Start difference. First operand 310 states and 457 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:25,373 INFO L93 Difference]: Finished difference Result 1801 states and 2793 transitions. [2023-11-24 23:21:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:25,402 INFO L225 Difference]: With dead ends: 1801 [2023-11-24 23:21:25,402 INFO L226 Difference]: Without dead ends: 1496 [2023-11-24 23:21:25,410 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 23:21:25,413 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 988 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:25,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1012 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:21:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2023-11-24 23:21:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1460. [2023-11-24 23:21:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1227 states have (on average 1.4612876935615322) internal successors, (1793), 1235 states have internal predecessors, (1793), 172 states have call successors, (172), 60 states have call predecessors, (172), 60 states have return successors, (262), 165 states have call predecessors, (262), 172 states have call successors, (262) [2023-11-24 23:21:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2227 transitions. [2023-11-24 23:21:25,611 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2227 transitions. Word has length 65 [2023-11-24 23:21:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:25,611 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 2227 transitions. [2023-11-24 23:21:25,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2227 transitions. [2023-11-24 23:21:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:25,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:25,616 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, 1, 1] [2023-11-24 23:21:25,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:21:25,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:25,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1185018623, now seen corresponding path program 1 times [2023-11-24 23:21:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126731486] [2023-11-24 23:21:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:25,785 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 23:21:25,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:25,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126731486] [2023-11-24 23:21:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126731486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:25,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562804970] [2023-11-24 23:21:25,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:25,790 INFO L87 Difference]: Start difference. First operand 1460 states and 2227 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:26,822 INFO L93 Difference]: Finished difference Result 5763 states and 9043 transitions. [2023-11-24 23:21:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:26,870 INFO L225 Difference]: With dead ends: 5763 [2023-11-24 23:21:26,871 INFO L226 Difference]: Without dead ends: 4308 [2023-11-24 23:21:26,885 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 23:21:26,891 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 991 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:26,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1023 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2023-11-24 23:21:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4038. [2023-11-24 23:21:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3475 states have (on average 1.4702158273381294) internal successors, (5109), 3441 states have internal predecessors, (5109), 398 states have call successors, (398), 148 states have call predecessors, (398), 164 states have return successors, (784), 449 states have call predecessors, (784), 398 states have call successors, (784) [2023-11-24 23:21:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6291 transitions. [2023-11-24 23:21:27,295 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6291 transitions. Word has length 65 [2023-11-24 23:21:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:27,296 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 6291 transitions. [2023-11-24 23:21:27,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6291 transitions. [2023-11-24 23:21:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:27,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:27,299 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, 1, 1] [2023-11-24 23:21:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:21:27,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:27,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1801943904, now seen corresponding path program 1 times [2023-11-24 23:21:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589462001] [2023-11-24 23:21:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:27,464 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 23:21:27,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:27,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589462001] [2023-11-24 23:21:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589462001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:27,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34811759] [2023-11-24 23:21:27,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:27,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:27,471 INFO L87 Difference]: Start difference. First operand 4038 states and 6291 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:28,755 INFO L93 Difference]: Finished difference Result 14911 states and 24025 transitions. [2023-11-24 23:21:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:28,850 INFO L225 Difference]: With dead ends: 14911 [2023-11-24 23:21:28,850 INFO L226 Difference]: Without dead ends: 10878 [2023-11-24 23:21:28,871 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 23:21:28,877 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 986 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:28,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1019 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10878 states. [2023-11-24 23:21:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10878 to 10270. [2023-11-24 23:21:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10270 states, 8957 states have (on average 1.477838562018533) internal successors, (13237), 8785 states have internal predecessors, (13237), 892 states have call successors, (892), 348 states have call predecessors, (892), 420 states have return successors, (2216), 1137 states have call predecessors, (2216), 892 states have call successors, (2216) [2023-11-24 23:21:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10270 states to 10270 states and 16345 transitions. [2023-11-24 23:21:29,854 INFO L78 Accepts]: Start accepts. Automaton has 10270 states and 16345 transitions. Word has length 65 [2023-11-24 23:21:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:29,855 INFO L495 AbstractCegarLoop]: Abstraction has 10270 states and 16345 transitions. [2023-11-24 23:21:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10270 states and 16345 transitions. [2023-11-24 23:21:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:29,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:29,860 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, 1, 1] [2023-11-24 23:21:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:21:29,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:29,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2093032193, now seen corresponding path program 1 times [2023-11-24 23:21:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166230891] [2023-11-24 23:21:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:29,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:30,026 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 23:21:30,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166230891] [2023-11-24 23:21:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166230891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535296644] [2023-11-24 23:21:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:30,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:30,030 INFO L87 Difference]: Start difference. First operand 10270 states and 16345 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:32,043 INFO L93 Difference]: Finished difference Result 37215 states and 61723 transitions. [2023-11-24 23:21:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:32,287 INFO L225 Difference]: With dead ends: 37215 [2023-11-24 23:21:32,288 INFO L226 Difference]: Without dead ends: 26950 [2023-11-24 23:21:32,361 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 23:21:32,364 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 980 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:32,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1018 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26950 states. [2023-11-24 23:21:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26950 to 25662. [2023-11-24 23:21:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25662 states, 22575 states have (on average 1.4861129568106313) internal successors, (33549), 21981 states have internal predecessors, (33549), 2010 states have call successors, (2010), 820 states have call predecessors, (2010), 1076 states have return successors, (6224), 2861 states have call predecessors, (6224), 2010 states have call successors, (6224) [2023-11-24 23:21:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25662 states to 25662 states and 41783 transitions. [2023-11-24 23:21:34,443 INFO L78 Accepts]: Start accepts. Automaton has 25662 states and 41783 transitions. Word has length 65 [2023-11-24 23:21:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:34,443 INFO L495 AbstractCegarLoop]: Abstraction has 25662 states and 41783 transitions. [2023-11-24 23:21:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25662 states and 41783 transitions. [2023-11-24 23:21:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-24 23:21:34,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:34,446 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, 1, 1] [2023-11-24 23:21:34,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:21:34,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:34,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash 573284830, now seen corresponding path program 1 times [2023-11-24 23:21:34,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:34,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513341017] [2023-11-24 23:21:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:34,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:34,743 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 23:21:34,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513341017] [2023-11-24 23:21:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513341017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:34,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:34,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761543442] [2023-11-24 23:21:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:34,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:34,747 INFO L87 Difference]: Start difference. First operand 25662 states and 41783 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:38,565 INFO L93 Difference]: Finished difference Result 93169 states and 159964 transitions. [2023-11-24 23:21:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2023-11-24 23:21:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:39,022 INFO L225 Difference]: With dead ends: 93169 [2023-11-24 23:21:39,022 INFO L226 Difference]: Without dead ends: 67512 [2023-11-24 23:21:39,123 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 23:21:39,124 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 976 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:39,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1015 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67512 states. [2023-11-24 23:21:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67512 to 64498. [2023-11-24 23:21:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64498 states, 56963 states have (on average 1.4893702929972088) internal successors, (84839), 54831 states have internal predecessors, (84839), 4714 states have call successors, (4714), 1980 states have call predecessors, (4714), 2820 states have return successors, (18172), 7687 states have call predecessors, (18172), 4714 states have call successors, (18172) [2023-11-24 23:21:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64498 states to 64498 states and 107725 transitions. [2023-11-24 23:21:45,148 INFO L78 Accepts]: Start accepts. Automaton has 64498 states and 107725 transitions. Word has length 65 [2023-11-24 23:21:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:45,148 INFO L495 AbstractCegarLoop]: Abstraction has 64498 states and 107725 transitions. [2023-11-24 23:21:45,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 23:21:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 64498 states and 107725 transitions. [2023-11-24 23:21:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-24 23:21:45,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:45,151 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, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:21:45,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:45,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash -729906047, now seen corresponding path program 1 times [2023-11-24 23:21:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644386863] [2023-11-24 23:21:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:45,806 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 23:21:45,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:45,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644386863] [2023-11-24 23:21:45,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644386863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:45,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:45,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:45,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843211402] [2023-11-24 23:21:45,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:45,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:45,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:45,810 INFO L87 Difference]: Start difference. First operand 64498 states and 107725 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 23:21:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:50,867 INFO L93 Difference]: Finished difference Result 173723 states and 292546 transitions. [2023-11-24 23:21:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:21:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 69 [2023-11-24 23:21:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:51,571 INFO L225 Difference]: With dead ends: 173723 [2023-11-24 23:21:51,572 INFO L226 Difference]: Without dead ends: 109231 [2023-11-24 23:21:51,706 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 23:21:51,708 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 698 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:51,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 654 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:21:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109231 states. [2023-11-24 23:21:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109231 to 102476. [2023-11-24 23:21:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102476 states, 90566 states have (on average 1.4764812402005167) internal successors, (133719), 87635 states have internal predecessors, (133719), 7069 states have call successors, (7069), 3160 states have call predecessors, (7069), 4840 states have return successors, (27256), 11681 states have call predecessors, (27256), 7069 states have call successors, (27256) [2023-11-24 23:21:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102476 states to 102476 states and 168044 transitions. [2023-11-24 23:21:59,648 INFO L78 Accepts]: Start accepts. Automaton has 102476 states and 168044 transitions. Word has length 69 [2023-11-24 23:21:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:59,648 INFO L495 AbstractCegarLoop]: Abstraction has 102476 states and 168044 transitions. [2023-11-24 23:21:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 23:21:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 102476 states and 168044 transitions. [2023-11-24 23:21:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-24 23:21:59,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:59,656 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:21:59,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:59,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1801669997, now seen corresponding path program 1 times [2023-11-24 23:21:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772664975] [2023-11-24 23:21:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:59,951 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 23:21:59,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772664975] [2023-11-24 23:21:59,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772664975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:59,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864295672] [2023-11-24 23:21:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:59,955 INFO L87 Difference]: Start difference. First operand 102476 states and 168044 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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)