./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI --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 ae9f818c1f032966d67b2bd4627e73bc680f5fe59ca24bfc7cff4e83563ff8e3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:07:23,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:23,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:23,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:23,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:23,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:23,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:23,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:23,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:23,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:23,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:23,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:23,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:23,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:23,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:23,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:23,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:23,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:23,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:23,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:23,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:23,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:23,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:23,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:23,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:23,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:23,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:23,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:23,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:23,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:23,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:23,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:23,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:23,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:23,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:23,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:23,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:23,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:23,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:23,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:23,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:23,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:07:23,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:23,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:23,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:23,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:23,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:23,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:23,800 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:23,800 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:23,801 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:23,801 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:23,801 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:23,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:23,802 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:23,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:23,802 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:23,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:23,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:23,803 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:23,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:23,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:07:23,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:23,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:07:23,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:23,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:23,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:23,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:23,806 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:07:23,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:23,807 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:23,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:23,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:23,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:23,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:23,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:23,809 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:23,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:23,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:23,810 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:23,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:23,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:23,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:23,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae9f818c1f032966d67b2bd4627e73bc680f5fe59ca24bfc7cff4e83563ff8e3 [2022-11-03 02:07:24,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:24,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:24,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:24,172 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:24,173 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:24,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c [2022-11-03 02:07:24,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/data/ca67aba1d/631af52f630649b9997951bff04e2787/FLAGc09d73f80 [2022-11-03 02:07:25,305 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:25,306 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c [2022-11-03 02:07:25,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/data/ca67aba1d/631af52f630649b9997951bff04e2787/FLAGc09d73f80 [2022-11-03 02:07:25,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/data/ca67aba1d/631af52f630649b9997951bff04e2787 [2022-11-03 02:07:25,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:25,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:25,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:25,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:25,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:25,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:25" (1/1) ... [2022-11-03 02:07:25,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a25682f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:25, skipping insertion in model container [2022-11-03 02:07:25,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:25" (1/1) ... [2022-11-03 02:07:25,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:25,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:28,340 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_da862849-1390-43cc-923a-95be93079712/sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c[376251,376264] [2022-11-03 02:07:28,379 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_da862849-1390-43cc-923a-95be93079712/sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c[383339,383352] [2022-11-03 02:07:28,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:28,763 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:29,989 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_da862849-1390-43cc-923a-95be93079712/sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c[376251,376264] [2022-11-03 02:07:30,001 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_da862849-1390-43cc-923a-95be93079712/sv-benchmarks/c/combinations/Problem05_label41+token_ring.11.cil-2.c[383339,383352] [2022-11-03 02:07:30,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:30,173 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:30,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30 WrapperNode [2022-11-03 02:07:30,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:30,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:30,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:30,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:30,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:30,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:30,826 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13141 [2022-11-03 02:07:30,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:30,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:30,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:30,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:30,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:30,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:30,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:30,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,262 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:31,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:31,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:31,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:31,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (1/1) ... [2022-11-03 02:07:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:31,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:31,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:07:31,555 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:07:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:07:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:07:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:07:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:07:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:07:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:07:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:07:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:07:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:07:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:07:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:07:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:31,790 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:31,792 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:41,101 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:43,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:43,931 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 02:07:43,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:43 BoogieIcfgContainer [2022-11-03 02:07:43,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:43,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:43,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:43,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:43,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:25" (1/3) ... [2022-11-03 02:07:43,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f358540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:43, skipping insertion in model container [2022-11-03 02:07:43,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:30" (2/3) ... [2022-11-03 02:07:43,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f358540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:43, skipping insertion in model container [2022-11-03 02:07:43,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:43" (3/3) ... [2022-11-03 02:07:43,949 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.11.cil-2.c [2022-11-03 02:07:43,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:43,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:07:44,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:44,080 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4430ffa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:44,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:07:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 02:07:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:07:44,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:44,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:44,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1611915106, now seen corresponding path program 1 times [2022-11-03 02:07:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:44,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510100476] [2022-11-03 02:07:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:44,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510100476] [2022-11-03 02:07:44,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510100476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:44,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201281501] [2022-11-03 02:07:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:44,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:44,824 INFO L87 Difference]: Start difference. First operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-03 02:07:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:46,098 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2022-11-03 02:07:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 64 [2022-11-03 02:07:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:46,137 INFO L225 Difference]: With dead ends: 3800 [2022-11-03 02:07:46,138 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:07:46,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:46,155 INFO L413 NwaCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:46,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:07:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:07:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2022-11-03 02:07:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1918 states have (on average 1.9228362877997915) internal successors, (3688), 1921 states have internal predecessors, (3688), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:07:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2022-11-03 02:07:46,330 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2022-11-03 02:07:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:46,331 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2022-11-03 02:07:46,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-03 02:07:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2022-11-03 02:07:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:46,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:46,339 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:07:46,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2000891643, now seen corresponding path program 1 times [2022-11-03 02:07:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406540020] [2022-11-03 02:07:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:46,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:46,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406540020] [2022-11-03 02:07:46,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406540020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135346972] [2022-11-03 02:07:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:46,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:46,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:46,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:07:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:47,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:07:47,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:47,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135346972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:47,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:47,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810598795] [2022-11-03 02:07:47,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:47,182 INFO L87 Difference]: Start difference. First operand 1978 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2022-11-03 02:07:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:47,757 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2022-11-03 02:07:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:47,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 129 [2022-11-03 02:07:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:47,770 INFO L225 Difference]: With dead ends: 2635 [2022-11-03 02:07:47,770 INFO L226 Difference]: Without dead ends: 2303 [2022-11-03 02:07:47,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:47,774 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3501 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:47,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-11-03 02:07:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2022-11-03 02:07:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2187 states have (on average 1.8715134887974394) internal successors, (4093), 2191 states have internal predecessors, (4093), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 02:07:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2022-11-03 02:07:47,918 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2022-11-03 02:07:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:47,919 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2022-11-03 02:07:47,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2022-11-03 02:07:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2022-11-03 02:07:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:47,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:47,924 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:47,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:48,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:48,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1782692039, now seen corresponding path program 1 times [2022-11-03 02:07:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834456477] [2022-11-03 02:07:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:48,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834456477] [2022-11-03 02:07:48,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834456477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:48,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369385144] [2022-11-03 02:07:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:48,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:48,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:48,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:48,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:07:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:07:48,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:48,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369385144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:48,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:48,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:48,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696015091] [2022-11-03 02:07:48,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:48,751 INFO L87 Difference]: Start difference. First operand 2299 states and 4265 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-11-03 02:07:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:49,345 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2022-11-03 02:07:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 129 [2022-11-03 02:07:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:49,363 INFO L225 Difference]: With dead ends: 3592 [2022-11-03 02:07:49,363 INFO L226 Difference]: Without dead ends: 2939 [2022-11-03 02:07:49,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:49,372 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3507 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:49,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3535 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-11-03 02:07:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2022-11-03 02:07:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2719 states have (on average 1.7988230967267378) internal successors, (4891), 2725 states have internal predecessors, (4891), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 02:07:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2022-11-03 02:07:49,505 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2022-11-03 02:07:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:49,505 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2022-11-03 02:07:49,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-11-03 02:07:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2022-11-03 02:07:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:49,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:49,511 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:49,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:49,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:49,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash -290044151, now seen corresponding path program 1 times [2022-11-03 02:07:49,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:49,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825978300] [2022-11-03 02:07:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:49,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:49,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:49,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825978300] [2022-11-03 02:07:49,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825978300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159439889] [2022-11-03 02:07:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:49,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:49,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:49,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:07:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:50,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:07:50,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:50,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159439889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:50,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:50,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082613718] [2022-11-03 02:07:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:50,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:50,198 INFO L87 Difference]: Start difference. First operand 2933 states and 5219 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-03 02:07:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:50,756 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2022-11-03 02:07:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 129 [2022-11-03 02:07:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:50,781 INFO L225 Difference]: With dead ends: 5482 [2022-11-03 02:07:50,781 INFO L226 Difference]: Without dead ends: 4195 [2022-11-03 02:07:50,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:50,793 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-11-03 02:07:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2022-11-03 02:07:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3771 states have (on average 1.7138690002651817) internal successors, (6463), 3781 states have internal predecessors, (6463), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-03 02:07:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2022-11-03 02:07:50,984 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2022-11-03 02:07:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:50,984 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2022-11-03 02:07:50,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-03 02:07:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2022-11-03 02:07:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:50,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:50,994 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:51,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:51,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:51,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash -429065849, now seen corresponding path program 1 times [2022-11-03 02:07:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381825164] [2022-11-03 02:07:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:51,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381825164] [2022-11-03 02:07:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381825164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836660623] [2022-11-03 02:07:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:51,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:51,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:51,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:07:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:07:51,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:51,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836660623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:51,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:51,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548137717] [2022-11-03 02:07:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:51,757 INFO L87 Difference]: Start difference. First operand 4185 states and 7095 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2022-11-03 02:07:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:52,408 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2022-11-03 02:07:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 129 [2022-11-03 02:07:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:52,444 INFO L225 Difference]: With dead ends: 9214 [2022-11-03 02:07:52,444 INFO L226 Difference]: Without dead ends: 6675 [2022-11-03 02:07:52,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:52,459 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3489 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:52,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-11-03 02:07:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2022-11-03 02:07:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5851 states have (on average 1.6337378225944283) internal successors, (9559), 5869 states have internal predecessors, (9559), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-03 02:07:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2022-11-03 02:07:52,924 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2022-11-03 02:07:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:52,925 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2022-11-03 02:07:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2022-11-03 02:07:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2022-11-03 02:07:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:52,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:52,937 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:52,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:53,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:53,159 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -464653239, now seen corresponding path program 1 times [2022-11-03 02:07:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129892927] [2022-11-03 02:07:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:53,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:53,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129892927] [2022-11-03 02:07:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129892927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854405265] [2022-11-03 02:07:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:53,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:53,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:07:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:07:53,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854405265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:53,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:53,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648681134] [2022-11-03 02:07:53,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:53,691 INFO L87 Difference]: Start difference. First operand 6657 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2022-11-03 02:07:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:54,513 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2022-11-03 02:07:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 129 [2022-11-03 02:07:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:54,578 INFO L225 Difference]: With dead ends: 16582 [2022-11-03 02:07:54,579 INFO L226 Difference]: Without dead ends: 11571 [2022-11-03 02:07:54,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:54,599 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:54,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-11-03 02:07:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2022-11-03 02:07:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9963 states have (on average 1.571313861286761) internal successors, (15655), 9997 states have internal predecessors, (15655), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-03 02:07:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2022-11-03 02:07:55,096 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2022-11-03 02:07:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:55,097 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2022-11-03 02:07:55,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2022-11-03 02:07:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2022-11-03 02:07:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:55,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:55,115 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:55,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:55,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:55,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash 841656459, now seen corresponding path program 1 times [2022-11-03 02:07:55,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:55,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156399012] [2022-11-03 02:07:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:55,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:55,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:55,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156399012] [2022-11-03 02:07:55,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156399012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:55,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956056243] [2022-11-03 02:07:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:55,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:55,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:55,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:55,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:07:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:07:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:07:55,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:55,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956056243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:55,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:55,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:07:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561283873] [2022-11-03 02:07:55,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:55,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:55,814 INFO L87 Difference]: Start difference. First operand 11537 states and 18031 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-11-03 02:07:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:57,041 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2022-11-03 02:07:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 129 [2022-11-03 02:07:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:57,149 INFO L225 Difference]: With dead ends: 31126 [2022-11-03 02:07:57,149 INFO L226 Difference]: Without dead ends: 21235 [2022-11-03 02:07:57,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:57,192 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:57,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2022-11-03 02:07:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2022-11-03 02:07:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18091 states have (on average 1.5286606599966834) internal successors, (27655), 18157 states have internal predecessors, (27655), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-03 02:07:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2022-11-03 02:07:58,428 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2022-11-03 02:07:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:58,428 INFO L495 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2022-11-03 02:07:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-11-03 02:07:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2022-11-03 02:07:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:07:58,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:58,474 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:07:58,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:58,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da862849-1390-43cc-923a-95be93079712/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:58,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 878774733, now seen corresponding path program 1 times [2022-11-03 02:07:58,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:58,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639558585] [2022-11-03 02:07:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:07:59,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639558585] [2022-11-03 02:07:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639558585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:59,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:59,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:07:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927889091] [2022-11-03 02:07:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:59,520 INFO L87 Difference]: Start difference. First operand 21169 states and 32271 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:02,949 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2022-11-03 02:08:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:08:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-11-03 02:08:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:03,225 INFO L225 Difference]: With dead ends: 66869 [2022-11-03 02:08:03,225 INFO L226 Difference]: Without dead ends: 47347 [2022-11-03 02:08:03,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:08:03,288 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 4189 mSDsluCounter, 7037 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 9835 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:03,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4209 Valid, 9835 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:08:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2022-11-03 02:08:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2022-11-03 02:08:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39921 states, 33899 states have (on average 1.5011357267176022) internal successors, (50887), 34029 states have internal predecessors, (50887), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2022-11-03 02:08:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2022-11-03 02:08:06,213 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2022-11-03 02:08:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:06,214 INFO L495 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2022-11-03 02:08:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2022-11-03 02:08:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:08:06,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:06,274 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:08:06,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:08:06,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2140532734, now seen corresponding path program 1 times [2022-11-03 02:08:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391629920] [2022-11-03 02:08:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:08:06,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391629920] [2022-11-03 02:08:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391629920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:06,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:06,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:06,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720826133] [2022-11-03 02:08:06,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:06,835 INFO L87 Difference]: Start difference. First operand 39921 states and 59855 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:12,936 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2022-11-03 02:08:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:08:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-03 02:08:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:13,426 INFO L225 Difference]: With dead ends: 125941 [2022-11-03 02:08:13,426 INFO L226 Difference]: Without dead ends: 87667 [2022-11-03 02:08:13,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:08:13,532 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 4123 mSDsluCounter, 10400 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4143 SdHoareTripleChecker+Valid, 12934 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:13,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4143 Valid, 12934 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:08:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2022-11-03 02:08:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2022-11-03 02:08:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76657 states, 64875 states have (on average 1.4828362235067438) internal successors, (96199), 65133 states have internal predecessors, (96199), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2022-11-03 02:08:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2022-11-03 02:08:18,823 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2022-11-03 02:08:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:18,823 INFO L495 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2022-11-03 02:08:18,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2022-11-03 02:08:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:08:18,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:18,981 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 02:08:18,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:08:18,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 437833837, now seen corresponding path program 1 times [2022-11-03 02:08:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:18,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855418086] [2022-11-03 02:08:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:18,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:08:19,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855418086] [2022-11-03 02:08:19,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855418086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:19,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:19,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055240982] [2022-11-03 02:08:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:19,535 INFO L87 Difference]: Start difference. First operand 76657 states and 113615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)