./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:21,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:21,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:21,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:21,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:21,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:21,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:21,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:21,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:21,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:21,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:21,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:21,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:21,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:21,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:21,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:21,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:21,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:21,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:21,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:21,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:21,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:21,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:21,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:21,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:21,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:21,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:21,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:21,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:21,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:21,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:21,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:21,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:21,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:21,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:21,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:21,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:21,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:21,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:21,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:21,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:21,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:06:21,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:21,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:21,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:21,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:21,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:21,653 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:21,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:21,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:21,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:21,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:21,655 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:21,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:21,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:21,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:21,657 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:21,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:21,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:21,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:21,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:21,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:21,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:21,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:21,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:21,660 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:21,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:21,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:21,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:21,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:21,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:21,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:21,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:21,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:21,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:21,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:21,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:21,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:21,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:21,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:21,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:21,666 INFO L138 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_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df [2021-11-07 02:06:22,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:22,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:22,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:22,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:22,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:22,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2021-11-07 02:06:22,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/data/3dd75027b/43fdb2ec326240f3a5675562587f84f8/FLAG665a723da [2021-11-07 02:06:22,836 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:22,838 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/sv-benchmarks/c/systemc/transmitter.06.cil.c [2021-11-07 02:06:22,862 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/data/3dd75027b/43fdb2ec326240f3a5675562587f84f8/FLAG665a723da [2021-11-07 02:06:23,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/data/3dd75027b/43fdb2ec326240f3a5675562587f84f8 [2021-11-07 02:06:23,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:23,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:23,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:23,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:23,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:23,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a09a176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23, skipping insertion in model container [2021-11-07 02:06:23,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:23,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:23,394 WARN L228 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_fe078fc2-5247-4ef7-ac98-87cc4847c321/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2021-11-07 02:06:23,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:23,548 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:23,568 WARN L228 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_fe078fc2-5247-4ef7-ac98-87cc4847c321/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2021-11-07 02:06:23,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:23,711 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:23,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23 WrapperNode [2021-11-07 02:06:23,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:23,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:23,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:23,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:23,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:23,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:23,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:23,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:23,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:23,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:23,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:23,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:23,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (1/1) ... [2021-11-07 02:06:23,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:23,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:23,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:24,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe078fc2-5247-4ef7-ac98-87cc4847c321/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:06:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:24,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:06:27,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:06:27,764 INFO L299 CfgBuilder]: Removed 218 assume(true) statements. [2021-11-07 02:06:27,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:27 BoogieIcfgContainer [2021-11-07 02:06:27,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:06:27,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:06:27,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:06:27,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:06:27,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:23" (1/3) ... [2021-11-07 02:06:27,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcd973e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:27, skipping insertion in model container [2021-11-07 02:06:27,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:23" (2/3) ... [2021-11-07 02:06:27,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcd973e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:27, skipping insertion in model container [2021-11-07 02:06:27,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:27" (3/3) ... [2021-11-07 02:06:27,779 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2021-11-07 02:06:27,786 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:06:27,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:06:27,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:06:27,856 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:06:27,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:06:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 300 states, 298 states have (on average 1.5436241610738255) internal successors, (460), 299 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:06:27,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:27,893 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:27,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1946680222, now seen corresponding path program 1 times [2021-11-07 02:06:27,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:27,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000962381] [2021-11-07 02:06:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:27,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:28,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:28,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000962381] [2021-11-07 02:06:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000962381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:28,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:28,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:06:28,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321251074] [2021-11-07 02:06:28,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:28,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:28,177 INFO L87 Difference]: Start difference. First operand has 300 states, 298 states have (on average 1.5436241610738255) internal successors, (460), 299 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:28,386 INFO L93 Difference]: Finished difference Result 859 states and 1314 transitions. [2021-11-07 02:06:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:06:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:28,419 INFO L225 Difference]: With dead ends: 859 [2021-11-07 02:06:28,420 INFO L226 Difference]: Without dead ends: 557 [2021-11-07 02:06:28,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-07 02:06:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 528. [2021-11-07 02:06:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.5047438330170777) internal successors, (793), 527 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 793 transitions. [2021-11-07 02:06:28,548 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 793 transitions. Word has length 36 [2021-11-07 02:06:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:28,549 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 793 transitions. [2021-11-07 02:06:28,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 793 transitions. [2021-11-07 02:06:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:06:28,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:28,553 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:28,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:06:28,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -895231133, now seen corresponding path program 1 times [2021-11-07 02:06:28,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:28,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022579483] [2021-11-07 02:06:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:28,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:28,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:28,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022579483] [2021-11-07 02:06:28,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022579483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:28,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:28,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:28,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706771179] [2021-11-07 02:06:28,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:28,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:28,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:28,709 INFO L87 Difference]: Start difference. First operand 528 states and 793 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:28,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:28,946 INFO L93 Difference]: Finished difference Result 1740 states and 2600 transitions. [2021-11-07 02:06:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:06:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:28,956 INFO L225 Difference]: With dead ends: 1740 [2021-11-07 02:06:28,957 INFO L226 Difference]: Without dead ends: 1221 [2021-11-07 02:06:28,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-07 02:06:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 955. [2021-11-07 02:06:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.4863731656184487) internal successors, (1418), 954 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1418 transitions. [2021-11-07 02:06:29,021 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1418 transitions. Word has length 36 [2021-11-07 02:06:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:29,023 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1418 transitions. [2021-11-07 02:06:29,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1418 transitions. [2021-11-07 02:06:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:06:29,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:29,031 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:06:29,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1866905820, now seen corresponding path program 1 times [2021-11-07 02:06:29,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:29,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148721397] [2021-11-07 02:06:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:29,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:29,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:29,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148721397] [2021-11-07 02:06:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148721397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:29,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:29,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:29,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598407255] [2021-11-07 02:06:29,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:29,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:29,175 INFO L87 Difference]: Start difference. First operand 955 states and 1418 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:29,406 INFO L93 Difference]: Finished difference Result 3166 states and 4678 transitions. [2021-11-07 02:06:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:06:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:29,423 INFO L225 Difference]: With dead ends: 3166 [2021-11-07 02:06:29,424 INFO L226 Difference]: Without dead ends: 2223 [2021-11-07 02:06:29,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-11-07 02:06:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1744. [2021-11-07 02:06:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 1.46815834767642) internal successors, (2559), 1743 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2559 transitions. [2021-11-07 02:06:29,509 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2559 transitions. Word has length 36 [2021-11-07 02:06:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 2559 transitions. [2021-11-07 02:06:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2559 transitions. [2021-11-07 02:06:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:06:29,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:29,515 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:06:29,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:29,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1228121341, now seen corresponding path program 1 times [2021-11-07 02:06:29,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:29,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106739650] [2021-11-07 02:06:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:29,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:29,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:29,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106739650] [2021-11-07 02:06:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106739650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:29,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418995274] [2021-11-07 02:06:29,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:29,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:29,643 INFO L87 Difference]: Start difference. First operand 1744 states and 2559 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:29,982 INFO L93 Difference]: Finished difference Result 5746 states and 8388 transitions. [2021-11-07 02:06:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:06:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:30,012 INFO L225 Difference]: With dead ends: 5746 [2021-11-07 02:06:30,012 INFO L226 Difference]: Without dead ends: 4021 [2021-11-07 02:06:30,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-11-07 02:06:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3195. [2021-11-07 02:06:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 1.4502191609267376) internal successors, (4632), 3194 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4632 transitions. [2021-11-07 02:06:30,179 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4632 transitions. Word has length 36 [2021-11-07 02:06:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:30,179 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4632 transitions. [2021-11-07 02:06:30,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4632 transitions. [2021-11-07 02:06:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:06:30,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:30,182 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:30,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:06:30,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -566787550, now seen corresponding path program 1 times [2021-11-07 02:06:30,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:30,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49498314] [2021-11-07 02:06:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:30,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:30,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49498314] [2021-11-07 02:06:30,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49498314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:30,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:30,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:30,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729965645] [2021-11-07 02:06:30,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:30,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:30,351 INFO L87 Difference]: Start difference. First operand 3195 states and 4632 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:30,779 INFO L93 Difference]: Finished difference Result 9173 states and 13359 transitions. [2021-11-07 02:06:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:06:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:30,819 INFO L225 Difference]: With dead ends: 9173 [2021-11-07 02:06:30,819 INFO L226 Difference]: Without dead ends: 6003 [2021-11-07 02:06:30,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-11-07 02:06:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 4659. [2021-11-07 02:06:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 1.4555603263203092) internal successors, (6780), 4658 states have internal predecessors, (6780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6780 transitions. [2021-11-07 02:06:31,159 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6780 transitions. Word has length 36 [2021-11-07 02:06:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:31,160 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 6780 transitions. [2021-11-07 02:06:31,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6780 transitions. [2021-11-07 02:06:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 02:06:31,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:31,162 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:31,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:06:31,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash -639674287, now seen corresponding path program 1 times [2021-11-07 02:06:31,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:31,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631638797] [2021-11-07 02:06:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:31,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:31,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:31,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631638797] [2021-11-07 02:06:31,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631638797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:31,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:31,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:31,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996917871] [2021-11-07 02:06:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:31,238 INFO L87 Difference]: Start difference. First operand 4659 states and 6780 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:31,801 INFO L93 Difference]: Finished difference Result 16287 states and 23809 transitions. [2021-11-07 02:06:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 02:06:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:31,911 INFO L225 Difference]: With dead ends: 16287 [2021-11-07 02:06:31,911 INFO L226 Difference]: Without dead ends: 11653 [2021-11-07 02:06:31,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11653 states. [2021-11-07 02:06:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11653 to 8887. [2021-11-07 02:06:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.452171955885663) internal successors, (12904), 8886 states have internal predecessors, (12904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 12904 transitions. [2021-11-07 02:06:32,472 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 12904 transitions. Word has length 37 [2021-11-07 02:06:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 12904 transitions. [2021-11-07 02:06:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 12904 transitions. [2021-11-07 02:06:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:06:32,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:32,475 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:06:32,475 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -99012267, now seen corresponding path program 1 times [2021-11-07 02:06:32,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:32,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552795085] [2021-11-07 02:06:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:32,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:32,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:32,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552795085] [2021-11-07 02:06:32,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552795085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:32,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:32,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:32,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374379916] [2021-11-07 02:06:32,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:32,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:32,578 INFO L87 Difference]: Start difference. First operand 8887 states and 12904 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:33,672 INFO L93 Difference]: Finished difference Result 31400 states and 45720 transitions. [2021-11-07 02:06:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:06:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:33,744 INFO L225 Difference]: With dead ends: 31400 [2021-11-07 02:06:33,744 INFO L226 Difference]: Without dead ends: 22538 [2021-11-07 02:06:33,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22538 states. [2021-11-07 02:06:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22538 to 16939. [2021-11-07 02:06:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16939 states, 16938 states have (on average 1.4481048529932696) internal successors, (24528), 16938 states have internal predecessors, (24528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16939 states to 16939 states and 24528 transitions. [2021-11-07 02:06:34,679 INFO L78 Accepts]: Start accepts. Automaton has 16939 states and 24528 transitions. Word has length 38 [2021-11-07 02:06:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:34,680 INFO L470 AbstractCegarLoop]: Abstraction has 16939 states and 24528 transitions. [2021-11-07 02:06:34,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 16939 states and 24528 transitions. [2021-11-07 02:06:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:06:34,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:34,682 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:34,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:06:34,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1474070219, now seen corresponding path program 1 times [2021-11-07 02:06:34,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:34,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321171536] [2021-11-07 02:06:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:34,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:34,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:34,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321171536] [2021-11-07 02:06:34,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321171536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:34,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:34,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:06:34,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630639116] [2021-11-07 02:06:34,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:34,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:34,732 INFO L87 Difference]: Start difference. First operand 16939 states and 24528 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:36,130 INFO L93 Difference]: Finished difference Result 47871 states and 69346 transitions. [2021-11-07 02:06:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 02:06:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:36,223 INFO L225 Difference]: With dead ends: 47871 [2021-11-07 02:06:36,223 INFO L226 Difference]: Without dead ends: 30957 [2021-11-07 02:06:36,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30957 states. [2021-11-07 02:06:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30957 to 30955. [2021-11-07 02:06:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30955 states, 30954 states have (on average 1.4457582218776248) internal successors, (44752), 30954 states have internal predecessors, (44752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30955 states to 30955 states and 44752 transitions. [2021-11-07 02:06:37,873 INFO L78 Accepts]: Start accepts. Automaton has 30955 states and 44752 transitions. Word has length 39 [2021-11-07 02:06:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:37,873 INFO L470 AbstractCegarLoop]: Abstraction has 30955 states and 44752 transitions. [2021-11-07 02:06:37,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 30955 states and 44752 transitions. [2021-11-07 02:06:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:06:37,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:37,875 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:37,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:06:37,876 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1329157091, now seen corresponding path program 1 times [2021-11-07 02:06:37,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:37,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522483518] [2021-11-07 02:06:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:37,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:37,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522483518] [2021-11-07 02:06:37,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522483518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:37,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:37,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:37,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833646875] [2021-11-07 02:06:37,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:37,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:37,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:37,985 INFO L87 Difference]: Start difference. First operand 30955 states and 44752 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:40,481 INFO L93 Difference]: Finished difference Result 110153 states and 158925 transitions. [2021-11-07 02:06:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:06:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:40,728 INFO L225 Difference]: With dead ends: 110153 [2021-11-07 02:06:40,729 INFO L226 Difference]: Without dead ends: 79223 [2021-11-07 02:06:40,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79223 states. [2021-11-07 02:06:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79223 to 56091. [2021-11-07 02:06:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56091 states, 56090 states have (on average 1.4428240328044215) internal successors, (80928), 56090 states have internal predecessors, (80928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56091 states to 56091 states and 80928 transitions. [2021-11-07 02:06:43,747 INFO L78 Accepts]: Start accepts. Automaton has 56091 states and 80928 transitions. Word has length 40 [2021-11-07 02:06:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:43,748 INFO L470 AbstractCegarLoop]: Abstraction has 56091 states and 80928 transitions. [2021-11-07 02:06:43,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 56091 states and 80928 transitions. [2021-11-07 02:06:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:06:43,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:43,750 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:43,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:06:43,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1400325495, now seen corresponding path program 1 times [2021-11-07 02:06:43,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:43,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963157612] [2021-11-07 02:06:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:43,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:43,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:43,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963157612] [2021-11-07 02:06:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963157612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:43,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:43,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:06:43,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079866975] [2021-11-07 02:06:43,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:43,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:43,840 INFO L87 Difference]: Start difference. First operand 56091 states and 80928 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:48,423 INFO L93 Difference]: Finished difference Result 200033 states and 288931 transitions. [2021-11-07 02:06:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:06:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:48,845 INFO L225 Difference]: With dead ends: 200033 [2021-11-07 02:06:48,845 INFO L226 Difference]: Without dead ends: 143967 [2021-11-07 02:06:49,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143967 states. [2021-11-07 02:06:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143967 to 105691. [2021-11-07 02:06:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105691 states, 105690 states have (on average 1.4366543665436655) internal successors, (151840), 105690 states have internal predecessors, (151840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105691 states to 105691 states and 151840 transitions. [2021-11-07 02:06:54,092 INFO L78 Accepts]: Start accepts. Automaton has 105691 states and 151840 transitions. Word has length 41 [2021-11-07 02:06:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 105691 states and 151840 transitions. [2021-11-07 02:06:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 105691 states and 151840 transitions. [2021-11-07 02:06:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:06:54,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:54,098 INFO L513 BasicCegarLoop]: 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] [2021-11-07 02:06:54,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 02:06:54,098 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash -295812351, now seen corresponding path program 1 times [2021-11-07 02:06:54,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:06:54,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745945942] [2021-11-07 02:06:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:54,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:06:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:54,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:54,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745945942] [2021-11-07 02:06:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745945942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:54,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:54,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:06:54,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884707898] [2021-11-07 02:06:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:54,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:06:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:54,155 INFO L87 Difference]: Start difference. First operand 105691 states and 151840 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:00,846 INFO L93 Difference]: Finished difference Result 313119 states and 447651 transitions. [2021-11-07 02:07:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:07:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:01,343 INFO L225 Difference]: With dead ends: 313119 [2021-11-07 02:07:01,343 INFO L226 Difference]: Without dead ends: 207450 [2021-11-07 02:07:01,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207450 states. [2021-11-07 02:07:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207450 to 206682. [2021-11-07 02:07:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206682 states, 206681 states have (on average 1.4087651985426817) internal successors, (291165), 206681 states have internal predecessors, (291165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206682 states to 206682 states and 291165 transitions. [2021-11-07 02:07:10,570 INFO L78 Accepts]: Start accepts. Automaton has 206682 states and 291165 transitions. Word has length 42 [2021-11-07 02:07:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:10,570 INFO L470 AbstractCegarLoop]: Abstraction has 206682 states and 291165 transitions. [2021-11-07 02:07:10,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 206682 states and 291165 transitions. [2021-11-07 02:07:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:07:10,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:10,596 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 02:07:10,597 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1004983971, now seen corresponding path program 1 times [2021-11-07 02:07:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:10,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747043266] [2021-11-07 02:07:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:10,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:10,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:07:10,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747043266] [2021-11-07 02:07:10,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747043266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:10,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:10,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:07:10,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967046642] [2021-11-07 02:07:10,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:10,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:07:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:10,648 INFO L87 Difference]: Start difference. First operand 206682 states and 291165 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)