./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs --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 d46cc80a8d21eeff79ba02488456fda09c76eb75ff8eedd6b93124365a06d1f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:58:46,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:58:46,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:58:46,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:58:46,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:58:46,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:58:46,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:58:46,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:58:46,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:58:46,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:58:46,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:58:46,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:58:46,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:58:46,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:58:46,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:58:46,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:58:46,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:58:46,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:58:46,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:58:46,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:58:46,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:58:46,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:58:46,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:58:46,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:58:46,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:58:46,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:58:46,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:58:46,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:58:46,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:58:46,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:58:46,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:58:46,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:58:46,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:58:46,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:58:46,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:58:46,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:58:46,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:58:46,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:58:46,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:58:46,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:58:46,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:58:46,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:58:46,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:58:46,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:58:46,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:58:46,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:58:46,657 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:58:46,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:58:46,657 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:58:46,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:58:46,658 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:58:46,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:58:46,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:58:46,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:58:46,659 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:58:46,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:58:46,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:58:46,660 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:58:46,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:58:46,661 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:58:46,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:58:46,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:58:46,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:58:46,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:58:46,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:58:46,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:58:46,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:58:46,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:58:46,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:58:46,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:58:46,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:58:46,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:58:46,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:58:46,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:58:46,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:58:46,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:58:46,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:58:46,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:58:46,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:58:46,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:58:46,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:58:46,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:58:46,667 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_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d46cc80a8d21eeff79ba02488456fda09c76eb75ff8eedd6b93124365a06d1f9 [2021-11-19 14:58:47,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:58:47,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:58:47,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:58:47,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:58:47,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:58:47,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c [2021-11-19 14:58:47,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/data/dadd1ed94/ce7cd20ccc4a40b6834abb7138e29210/FLAGe49085bd0 [2021-11-19 14:58:48,535 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:58:48,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c [2021-11-19 14:58:48,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/data/dadd1ed94/ce7cd20ccc4a40b6834abb7138e29210/FLAGe49085bd0 [2021-11-19 14:58:48,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/data/dadd1ed94/ce7cd20ccc4a40b6834abb7138e29210 [2021-11-19 14:58:48,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:58:48,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:58:48,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:58:48,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:58:48,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:58:48,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:58:48" (1/1) ... [2021-11-19 14:58:48,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa10b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:48, skipping insertion in model container [2021-11-19 14:58:48,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:58:48" (1/1) ... [2021-11-19 14:58:48,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:58:49,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:58:51,630 WARN L230 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_a9e5ba96-84b8-4c80-b406-a0281d52b433/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[377612,377625] [2021-11-19 14:58:51,676 WARN L230 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_a9e5ba96-84b8-4c80-b406-a0281d52b433/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[383339,383352] [2021-11-19 14:58:52,076 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:58:52,094 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:58:53,498 WARN L230 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_a9e5ba96-84b8-4c80-b406-a0281d52b433/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[377612,377625] [2021-11-19 14:58:53,538 WARN L230 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_a9e5ba96-84b8-4c80-b406-a0281d52b433/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[383339,383352] [2021-11-19 14:58:53,624 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:58:53,828 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:58:53,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53 WrapperNode [2021-11-19 14:58:53,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:58:53,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:58:53,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:58:53,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:58:53,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:54,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:54,585 INFO L137 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2021-11-19 14:58:54,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:58:54,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:58:54,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:58:54,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:58:54,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:54,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:54,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:54,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:55,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:55,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:55,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:55,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:58:55,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:58:55,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:58:55,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:58:55,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (1/1) ... [2021-11-19 14:58:55,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:58:55,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:58:55,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:58:55,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:58:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:58:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:58:55,630 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:58:55,630 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:58:55,630 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:58:55,630 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:58:55,631 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:58:55,631 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:58:55,631 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:58:55,631 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:58:55,631 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:58:55,632 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:58:55,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:58:55,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:58:55,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:58:55,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:58:55,768 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:58:55,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:59:05,423 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:59:08,220 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:59:08,220 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-19 14:59:08,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:59:08 BoogieIcfgContainer [2021-11-19 14:59:08,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:59:08,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:59:08,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:59:08,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:59:08,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:58:48" (1/3) ... [2021-11-19 14:59:08,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7014f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:59:08, skipping insertion in model container [2021-11-19 14:59:08,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:58:53" (2/3) ... [2021-11-19 14:59:08,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7014f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:59:08, skipping insertion in model container [2021-11-19 14:59:08,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:59:08" (3/3) ... [2021-11-19 14:59:08,240 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.09.cil-1.c [2021-11-19 14:59:08,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:59:08,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:59:08,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:59:08,327 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 [2021-11-19 14:59:08,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:59:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 14:59:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:59:08,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:08,437 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:08,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2122186724, now seen corresponding path program 1 times [2021-11-19 14:59:08,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:08,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476130533] [2021-11-19 14:59:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:08,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:09,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:09,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476130533] [2021-11-19 14:59:09,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476130533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:09,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:09,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:59:09,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262306025] [2021-11-19 14:59:09,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:09,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:59:09,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:59:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:59:09,105 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:59:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:10,261 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2021-11-19 14:59:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:59:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-19 14:59:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:10,306 INFO L225 Difference]: With dead ends: 3734 [2021-11-19 14:59:10,306 INFO L226 Difference]: Without dead ends: 1935 [2021-11-19 14:59:10,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:59:10,321 INFO L933 BasicCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:10,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:59:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-11-19 14:59:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2021-11-19 14:59:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-19 14:59:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2021-11-19 14:59:10,549 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2021-11-19 14:59:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:10,550 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2021-11-19 14:59:10,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:59:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2021-11-19 14:59:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:10,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:10,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:10,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:59:10,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash -715165516, now seen corresponding path program 1 times [2021-11-19 14:59:10,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:10,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202067587] [2021-11-19 14:59:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:10,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:59:10,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:10,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202067587] [2021-11-19 14:59:10,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202067587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:10,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326237701] [2021-11-19 14:59:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:10,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:10,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:10,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:59:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:59:11,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:59:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326237701] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:11,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:11,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:59:11,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523829973] [2021-11-19 14:59:11,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:11,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:11,721 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:12,288 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2021-11-19 14:59:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-19 14:59:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:12,307 INFO L225 Difference]: With dead ends: 2503 [2021-11-19 14:59:12,307 INFO L226 Difference]: Without dead ends: 2215 [2021-11-19 14:59:12,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:12,311 INFO L933 BasicCegarLoop]: 3292 mSDtfsCounter, 3471 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:12,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-11-19 14:59:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2021-11-19 14:59:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-19 14:59:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2021-11-19 14:59:12,416 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2021-11-19 14:59:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:12,416 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2021-11-19 14:59:12,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2021-11-19 14:59:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:12,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:12,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:12,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 14:59:12,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:12,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1559283126, now seen corresponding path program 1 times [2021-11-19 14:59:12,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:12,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126324346] [2021-11-19 14:59:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:12,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:59:12,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:12,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126324346] [2021-11-19 14:59:12,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126324346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:12,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823252232] [2021-11-19 14:59:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:12,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:12,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:12,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:59:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:13,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:59:13,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:59:13,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823252232] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:13,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:13,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:59:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357406352] [2021-11-19 14:59:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:13,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:13,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:13,578 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:14,479 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2021-11-19 14:59:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-19 14:59:14,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:14,511 INFO L225 Difference]: With dead ends: 3328 [2021-11-19 14:59:14,511 INFO L226 Difference]: Without dead ends: 2763 [2021-11-19 14:59:14,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:14,521 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:14,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:59:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-11-19 14:59:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2021-11-19 14:59:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-19 14:59:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2021-11-19 14:59:14,673 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2021-11-19 14:59:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:14,675 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2021-11-19 14:59:14,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2021-11-19 14:59:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:14,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:14,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:14,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:14,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:14,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -312572872, now seen corresponding path program 1 times [2021-11-19 14:59:14,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:14,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453400809] [2021-11-19 14:59:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:14,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:59:15,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:15,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453400809] [2021-11-19 14:59:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453400809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:15,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741617611] [2021-11-19 14:59:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:15,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:15,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:15,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:59:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:15,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:59:15,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:59:15,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741617611] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:15,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:15,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:59:15,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281479868] [2021-11-19 14:59:15,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:15,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:15,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:15,821 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:16,465 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2021-11-19 14:59:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:16,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-19 14:59:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:16,504 INFO L225 Difference]: With dead ends: 4954 [2021-11-19 14:59:16,504 INFO L226 Difference]: Without dead ends: 3843 [2021-11-19 14:59:16,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:16,514 INFO L933 BasicCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:16,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:59:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-11-19 14:59:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2021-11-19 14:59:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2021-11-19 14:59:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2021-11-19 14:59:16,714 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2021-11-19 14:59:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:16,714 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2021-11-19 14:59:16,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2021-11-19 14:59:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:16,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:16,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:16,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:16,939 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 382859254, now seen corresponding path program 1 times [2021-11-19 14:59:16,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:16,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257868195] [2021-11-19 14:59:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:16,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:59:17,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:17,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257868195] [2021-11-19 14:59:17,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257868195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:17,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741909100] [2021-11-19 14:59:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:17,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:17,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:17,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:59:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:17,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:59:17,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:59:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741909100] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:17,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:17,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:59:17,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688107690] [2021-11-19 14:59:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:17,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:17,956 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:18,624 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2021-11-19 14:59:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-19 14:59:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:18,675 INFO L225 Difference]: With dead ends: 8158 [2021-11-19 14:59:18,675 INFO L226 Difference]: Without dead ends: 5971 [2021-11-19 14:59:18,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:18,691 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:18,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-11-19 14:59:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2021-11-19 14:59:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2021-11-19 14:59:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2021-11-19 14:59:19,049 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2021-11-19 14:59:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:19,050 INFO L470 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2021-11-19 14:59:19,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2021-11-19 14:59:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:19,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:19,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:19,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:19,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:19,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 34160632, now seen corresponding path program 1 times [2021-11-19 14:59:19,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:19,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305360677] [2021-11-19 14:59:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:19,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:59:19,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:19,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305360677] [2021-11-19 14:59:19,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305360677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:19,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483818070] [2021-11-19 14:59:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:19,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:19,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:19,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:59:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:59:19,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:59:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483818070] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:20,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:20,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:59:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269599059] [2021-11-19 14:59:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:20,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:20,115 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:21,052 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2021-11-19 14:59:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:21,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-19 14:59:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:21,145 INFO L225 Difference]: With dead ends: 14470 [2021-11-19 14:59:21,145 INFO L226 Difference]: Without dead ends: 10163 [2021-11-19 14:59:21,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:59:21,172 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3453 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:21,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-11-19 14:59:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2021-11-19 14:59:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2021-11-19 14:59:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2021-11-19 14:59:21,744 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2021-11-19 14:59:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2021-11-19 14:59:21,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:59:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2021-11-19 14:59:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:59:21,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:21,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:21,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:22,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:22,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:22,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1515139450, now seen corresponding path program 1 times [2021-11-19 14:59:22,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:22,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648275148] [2021-11-19 14:59:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:22,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:59:22,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:22,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648275148] [2021-11-19 14:59:22,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648275148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:22,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:22,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:59:22,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80760030] [2021-11-19 14:59:22,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:22,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:22,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:22,079 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:59:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:22,889 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2021-11-19 14:59:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-19 14:59:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:22,944 INFO L225 Difference]: With dead ends: 16723 [2021-11-19 14:59:22,944 INFO L226 Difference]: Without dead ends: 12401 [2021-11-19 14:59:22,963 INFO L932 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 [2021-11-19 14:59:22,964 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:22,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:59:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2021-11-19 14:59:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2021-11-19 14:59:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2021-11-19 14:59:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2021-11-19 14:59:23,670 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2021-11-19 14:59:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:23,672 INFO L470 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2021-11-19 14:59:23,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:59:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2021-11-19 14:59:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:59:23,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:23,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:23,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:59:23,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1149638286, now seen corresponding path program 1 times [2021-11-19 14:59:23,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:23,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075664301] [2021-11-19 14:59:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:23,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:59:23,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:23,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075664301] [2021-11-19 14:59:23,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075664301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:23,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:23,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:59:23,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032312164] [2021-11-19 14:59:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:23,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:23,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:23,849 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:25,061 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2021-11-19 14:59:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-19 14:59:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:25,158 INFO L225 Difference]: With dead ends: 31558 [2021-11-19 14:59:25,159 INFO L226 Difference]: Without dead ends: 21491 [2021-11-19 14:59:25,198 INFO L932 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 [2021-11-19 14:59:25,199 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:25,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2021-11-19 14:59:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2021-11-19 14:59:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2021-11-19 14:59:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2021-11-19 14:59:26,459 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2021-11-19 14:59:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2021-11-19 14:59:26,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2021-11-19 14:59:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:59:26,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:26,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:26,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:59:26,522 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash 993860843, now seen corresponding path program 1 times [2021-11-19 14:59:26,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:26,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855043661] [2021-11-19 14:59:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:26,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:59:26,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:26,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855043661] [2021-11-19 14:59:26,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855043661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:26,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:26,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:59:26,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377621849] [2021-11-19 14:59:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:26,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:26,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:26,865 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:28,782 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2021-11-19 14:59:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-19 14:59:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:29,004 INFO L225 Difference]: With dead ends: 60310 [2021-11-19 14:59:29,004 INFO L226 Difference]: Without dead ends: 40563 [2021-11-19 14:59:29,068 INFO L932 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 [2021-11-19 14:59:29,070 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:29,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2021-11-19 14:59:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2021-11-19 14:59:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2021-11-19 14:59:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2021-11-19 14:59:31,284 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2021-11-19 14:59:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:31,287 INFO L470 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2021-11-19 14:59:31,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2021-11-19 14:59:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:59:31,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:31,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:31,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:59:31,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1553215863, now seen corresponding path program 1 times [2021-11-19 14:59:31,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:31,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976624552] [2021-11-19 14:59:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:31,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:59:31,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:31,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976624552] [2021-11-19 14:59:31,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976624552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:31,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:31,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:59:31,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462236623] [2021-11-19 14:59:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:31,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:31,741 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:35,244 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2021-11-19 14:59:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-19 14:59:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:35,612 INFO L225 Difference]: With dead ends: 116662 [2021-11-19 14:59:35,612 INFO L226 Difference]: Without dead ends: 77939 [2021-11-19 14:59:35,749 INFO L932 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 [2021-11-19 14:59:35,750 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:35,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:59:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2021-11-19 14:59:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2021-11-19 14:59:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2021-11-19 14:59:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2021-11-19 14:59:39,607 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2021-11-19 14:59:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:39,608 INFO L470 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2021-11-19 14:59:39,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2021-11-19 14:59:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:59:40,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:40,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:40,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:59:40,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1523468621, now seen corresponding path program 1 times [2021-11-19 14:59:40,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:40,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124740998] [2021-11-19 14:59:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:40,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:59:40,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:40,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124740998] [2021-11-19 14:59:40,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124740998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:40,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:40,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:59:40,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271037010] [2021-11-19 14:59:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:40,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:40,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:40,355 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:45,297 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2021-11-19 14:59:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-19 14:59:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:46,385 INFO L225 Difference]: With dead ends: 227062 [2021-11-19 14:59:46,385 INFO L226 Difference]: Without dead ends: 151155 [2021-11-19 14:59:46,577 INFO L932 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 [2021-11-19 14:59:46,578 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:59:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2021-11-19 14:59:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2021-11-19 14:59:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2021-11-19 14:59:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2021-11-19 14:59:53,321 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2021-11-19 14:59:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2021-11-19 14:59:53,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:59:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2021-11-19 14:59:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 14:59:53,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:53,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:53,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:59:53,755 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash 308110835, now seen corresponding path program 1 times [2021-11-19 14:59:53,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:53,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517961512] [2021-11-19 14:59:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:53,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:59:53,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:53,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517961512] [2021-11-19 14:59:53,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517961512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:53,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844338486] [2021-11-19 14:59:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:53,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:53,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:53,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e5ba96-84b8-4c80-b406-a0281d52b433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:59:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:54,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:59:54,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:59:54,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844338486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:54,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:59:54,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-11-19 14:59:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32413382] [2021-11-19 14:59:54,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:59:54,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:59:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:59:54,993 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 15:00:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:03,404 INFO L93 Difference]: Finished difference Result 306293 states and 450001 transitions. [2021-11-19 15:00:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:00:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 178 [2021-11-19 15:00:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:04,451 INFO L225 Difference]: With dead ends: 306293 [2021-11-19 15:00:04,451 INFO L226 Difference]: Without dead ends: 230771 [2021-11-19 15:00:04,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:00:04,630 INFO L933 BasicCegarLoop]: 3401 mSDtfsCounter, 219 mSDsluCounter, 7057 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 9958 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:04,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 9958 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 15:00:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230771 states.