./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh --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 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 --- 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-2329fc7 [2022-12-14 06:25:10,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:25:10,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:25:10,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:25:10,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:25:10,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:25:10,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:25:10,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:25:10,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:25:10,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:25:10,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:25:10,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:25:10,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:25:10,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:25:10,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:25:10,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:25:10,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:25:10,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:25:10,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:25:10,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:25:10,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:25:10,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:25:10,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:25:10,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:25:10,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:25:10,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:25:10,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:25:10,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:25:10,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:25:10,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:25:10,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:25:10,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:25:10,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:25:10,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:25:10,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:25:10,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:25:10,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:25:10,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:25:10,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:25:10,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:25:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:25:10,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:25:10,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:25:10,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:25:10,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:25:10,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:25:10,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:25:10,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:25:10,779 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:25:10,779 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:25:10,779 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:25:10,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:25:10,779 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:25:10,780 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:25:10,780 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:25:10,780 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:25:10,780 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:25:10,780 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:25:10,781 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:25:10,781 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:25:10,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:25:10,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:25:10,782 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:25:10,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:25:10,783 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:25:10,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:25:10,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:25:10,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:25:10,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:25:10,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:25:10,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:25:10,785 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_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 [2022-12-14 06:25:10,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:25:10,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:25:10,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:25:10,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:25:10,992 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:25:10,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-12-14 06:25:13,594 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:25:14,026 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:25:14,026 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-12-14 06:25:14,070 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/data/a0ace16b6/fcf2713900104f44b80b1d253d38c26b/FLAGbb80f8f94 [2022-12-14 06:25:14,081 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/data/a0ace16b6/fcf2713900104f44b80b1d253d38c26b [2022-12-14 06:25:14,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:25:14,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:25:14,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:25:14,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:25:14,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:25:14,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:25:14" (1/1) ... [2022-12-14 06:25:14,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25faae25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:14, skipping insertion in model container [2022-12-14 06:25:14,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:25:14" (1/1) ... [2022-12-14 06:25:14,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:25:14,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:25:15,578 WARN L237 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_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-12-14 06:25:15,597 WARN L237 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_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-12-14 06:25:15,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:25:15,764 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:25:16,562 WARN L237 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_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-12-14 06:25:16,564 WARN L237 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_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-12-14 06:25:16,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:25:16,607 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:25:16,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16 WrapperNode [2022-12-14 06:25:16,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:25:16,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:25:16,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:25:16,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:25:16,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:16,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:16,889 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2022-12-14 06:25:16,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:25:16,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:25:16,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:25:16,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:25:16,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:16,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:16,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:16,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:25:17,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:25:17,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:25:17,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:25:17,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (1/1) ... [2022-12-14 06:25:17,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:25:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:17,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:25:17,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:25:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:25:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:25:17,341 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:25:17,341 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:25:17,341 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:25:17,341 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:25:17,341 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:25:17,341 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 06:25:17,341 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 06:25:17,341 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:25:17,341 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:25:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:25:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:25:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:25:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:25:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:25:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:25:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:25:17,436 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:25:17,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:25:23,212 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:25:24,535 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:25:24,535 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 06:25:24,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:25:24 BoogieIcfgContainer [2022-12-14 06:25:24,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:25:24,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:25:24,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:25:24,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:25:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:25:14" (1/3) ... [2022-12-14 06:25:24,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80fadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:25:24, skipping insertion in model container [2022-12-14 06:25:24,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:25:16" (2/3) ... [2022-12-14 06:25:24,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80fadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:25:24, skipping insertion in model container [2022-12-14 06:25:24,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:25:24" (3/3) ... [2022-12-14 06:25:24,549 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-2.c [2022-12-14 06:25:24,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:25:24,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:25:24,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:25:24,638 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;@7b044b2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:25:24,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:25:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 06:25:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:25:24,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:24,659 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] [2022-12-14 06:25:24,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1041882366, now seen corresponding path program 1 times [2022-12-14 06:25:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:24,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948922218] [2022-12-14 06:25:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:25:24,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948922218] [2022-12-14 06:25:24,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948922218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:24,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:25:24,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:25:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897358275] [2022-12-14 06:25:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:24,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:25:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:25:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:25:24,967 INFO L87 Difference]: Start difference. First operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:25:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:25,644 INFO L93 Difference]: Finished difference Result 3613 states and 7055 transitions. [2022-12-14 06:25:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:25:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-12-14 06:25:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:25,661 INFO L225 Difference]: With dead ends: 3613 [2022-12-14 06:25:25,661 INFO L226 Difference]: Without dead ends: 1852 [2022-12-14 06:25:25,667 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 [2022-12-14 06:25:25,669 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3556 mSDsluCounter, 3236 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 6544 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:25:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-12-14 06:25:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1851. [2022-12-14 06:25:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1801 states have (on average 1.9444752915047196) internal successors, (3502), 1805 states have internal predecessors, (3502), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 06:25:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3572 transitions. [2022-12-14 06:25:25,753 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3572 transitions. Word has length 47 [2022-12-14 06:25:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:25,754 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 3572 transitions. [2022-12-14 06:25:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:25:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3572 transitions. [2022-12-14 06:25:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:25:25,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:25,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:25,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:25:25,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash -856154386, now seen corresponding path program 1 times [2022-12-14 06:25:25,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422154184] [2022-12-14 06:25:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:25,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:25:25,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:25,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422154184] [2022-12-14 06:25:25,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422154184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:25,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005850988] [2022-12-14 06:25:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:25,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:25:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:25:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:25:26,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:25:26,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005850988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:26,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:25:26,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:25:26,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989269489] [2022-12-14 06:25:26,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:26,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:26,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:26,079 INFO L87 Difference]: Start difference. First operand 1851 states and 3572 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:26,426 INFO L93 Difference]: Finished difference Result 2254 states and 4169 transitions. [2022-12-14 06:25:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-12-14 06:25:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:26,437 INFO L225 Difference]: With dead ends: 2254 [2022-12-14 06:25:26,437 INFO L226 Difference]: Without dead ends: 2049 [2022-12-14 06:25:26,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:26,440 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 3407 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:26,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-12-14 06:25:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2043. [2022-12-14 06:25:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1953 states have (on average 1.905273937532002) internal successors, (3721), 1958 states have internal predecessors, (3721), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-14 06:25:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3847 transitions. [2022-12-14 06:25:26,509 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3847 transitions. Word has length 88 [2022-12-14 06:25:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:26,509 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3847 transitions. [2022-12-14 06:25:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3847 transitions. [2022-12-14 06:25:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:25:26,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:26,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:26,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:25:26,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:26,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1900633260, now seen corresponding path program 1 times [2022-12-14 06:25:26,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:26,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057037810] [2022-12-14 06:25:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:25:26,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057037810] [2022-12-14 06:25:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057037810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303031682] [2022-12-14 06:25:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:26,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:26,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:25:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:25:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:25:27,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:25:27,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303031682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:27,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:25:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:25:27,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974015634] [2022-12-14 06:25:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:27,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:27,044 INFO L87 Difference]: Start difference. First operand 2043 states and 3847 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:27,441 INFO L93 Difference]: Finished difference Result 2824 states and 4998 transitions. [2022-12-14 06:25:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-12-14 06:25:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:27,460 INFO L225 Difference]: With dead ends: 2824 [2022-12-14 06:25:27,460 INFO L226 Difference]: Without dead ends: 2427 [2022-12-14 06:25:27,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:27,464 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3410 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:27,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-12-14 06:25:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2419. [2022-12-14 06:25:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2251 states have (on average 1.842292314526877) internal successors, (4147), 2258 states have internal predecessors, (4147), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 06:25:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 4381 transitions. [2022-12-14 06:25:27,570 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 4381 transitions. Word has length 88 [2022-12-14 06:25:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:27,571 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 4381 transitions. [2022-12-14 06:25:27,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 4381 transitions. [2022-12-14 06:25:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:25:27,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:27,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:27,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:25:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:27,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash 996761134, now seen corresponding path program 1 times [2022-12-14 06:25:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:27,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666824062] [2022-12-14 06:25:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:25:27,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666824062] [2022-12-14 06:25:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666824062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675166610] [2022-12-14 06:25:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:27,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:27,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:27,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:25:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:25:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:25:28,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:25:28,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675166610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:28,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:25:28,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:25:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142906422] [2022-12-14 06:25:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:28,019 INFO L87 Difference]: Start difference. First operand 2419 states and 4381 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:28,383 INFO L93 Difference]: Finished difference Result 3940 states and 6606 transitions. [2022-12-14 06:25:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-12-14 06:25:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:28,393 INFO L225 Difference]: With dead ends: 3940 [2022-12-14 06:25:28,393 INFO L226 Difference]: Without dead ends: 3167 [2022-12-14 06:25:28,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:28,396 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:28,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2022-12-14 06:25:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3155. [2022-12-14 06:25:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2835 states have (on average 1.7548500881834215) internal successors, (4975), 2846 states have internal predecessors, (4975), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-12-14 06:25:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5417 transitions. [2022-12-14 06:25:28,472 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5417 transitions. Word has length 88 [2022-12-14 06:25:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5417 transitions. [2022-12-14 06:25:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:25:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5417 transitions. [2022-12-14 06:25:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:25:28,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:28,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:28,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 06:25:28,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:28,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash -839695764, now seen corresponding path program 1 times [2022-12-14 06:25:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:28,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010353321] [2022-12-14 06:25:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:28,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:25:28,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010353321] [2022-12-14 06:25:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010353321] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:25:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:25:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360128828] [2022-12-14 06:25:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:28,757 INFO L87 Difference]: Start difference. First operand 3155 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:25:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:29,157 INFO L93 Difference]: Finished difference Result 4335 states and 7148 transitions. [2022-12-14 06:25:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-12-14 06:25:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:29,173 INFO L225 Difference]: With dead ends: 4335 [2022-12-14 06:25:29,173 INFO L226 Difference]: Without dead ends: 3547 [2022-12-14 06:25:29,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:29,178 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 64 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:29,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6456 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-12-14 06:25:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3399. [2022-12-14 06:25:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3063 states have (on average 1.7495919033627163) internal successors, (5359), 3074 states have internal predecessors, (5359), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-12-14 06:25:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5817 transitions. [2022-12-14 06:25:29,353 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5817 transitions. Word has length 88 [2022-12-14 06:25:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:29,353 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5817 transitions. [2022-12-14 06:25:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:25:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5817 transitions. [2022-12-14 06:25:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 06:25:29,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:29,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:29,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:25:29,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1394196728, now seen corresponding path program 1 times [2022-12-14 06:25:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847196694] [2022-12-14 06:25:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 06:25:29,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:29,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847196694] [2022-12-14 06:25:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847196694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:29,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:25:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:25:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364843989] [2022-12-14 06:25:29,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:29,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:29,455 INFO L87 Difference]: Start difference. First operand 3399 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:25:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:29,963 INFO L93 Difference]: Finished difference Result 6832 states and 10874 transitions. [2022-12-14 06:25:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-12-14 06:25:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:29,982 INFO L225 Difference]: With dead ends: 6832 [2022-12-14 06:25:29,982 INFO L226 Difference]: Without dead ends: 5079 [2022-12-14 06:25:29,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:29,988 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:29,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3334 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-12-14 06:25:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5051. [2022-12-14 06:25:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5051 states, 4403 states have (on average 1.6550079491255962) internal successors, (7287), 4422 states have internal predecessors, (7287), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-12-14 06:25:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8161 transitions. [2022-12-14 06:25:30,117 INFO L78 Accepts]: Start accepts. Automaton has 5051 states and 8161 transitions. Word has length 117 [2022-12-14 06:25:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:30,118 INFO L495 AbstractCegarLoop]: Abstraction has 5051 states and 8161 transitions. [2022-12-14 06:25:30,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:25:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5051 states and 8161 transitions. [2022-12-14 06:25:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 06:25:30,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:30,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:30,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:25:30,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 5491723, now seen corresponding path program 1 times [2022-12-14 06:25:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:30,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201508995] [2022-12-14 06:25:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 06:25:30,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201508995] [2022-12-14 06:25:30,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201508995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:30,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:25:30,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:25:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170334557] [2022-12-14 06:25:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:30,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:30,174 INFO L87 Difference]: Start difference. First operand 5051 states and 8161 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:25:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:30,605 INFO L93 Difference]: Finished difference Result 11716 states and 17866 transitions. [2022-12-14 06:25:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-12-14 06:25:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:30,641 INFO L225 Difference]: With dead ends: 11716 [2022-12-14 06:25:30,642 INFO L226 Difference]: Without dead ends: 8311 [2022-12-14 06:25:30,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:25:30,656 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 3404 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:30,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3404 Valid, 3355 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2022-12-14 06:25:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8259. [2022-12-14 06:25:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8259 states, 7003 states have (on average 1.5683278594887906) internal successors, (10983), 7038 states have internal predecessors, (10983), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-12-14 06:25:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 12657 transitions. [2022-12-14 06:25:30,899 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 12657 transitions. Word has length 117 [2022-12-14 06:25:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:30,900 INFO L495 AbstractCegarLoop]: Abstraction has 8259 states and 12657 transitions. [2022-12-14 06:25:30,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:25:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 12657 transitions. [2022-12-14 06:25:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:25:30,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:30,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:30,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:25:30,914 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 442701413, now seen corresponding path program 1 times [2022-12-14 06:25:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:30,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302856215] [2022-12-14 06:25:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:25:30,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302856215] [2022-12-14 06:25:30,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302856215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82803699] [2022-12-14 06:25:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:30,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:30,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:30,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:25:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:25:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:25:31,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:25:31,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82803699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:31,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:25:31,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:25:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533526984] [2022-12-14 06:25:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:31,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:31,162 INFO L87 Difference]: Start difference. First operand 8259 states and 12657 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:25:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:31,684 INFO L93 Difference]: Finished difference Result 14155 states and 21223 transitions. [2022-12-14 06:25:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-12-14 06:25:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:31,713 INFO L225 Difference]: With dead ends: 14155 [2022-12-14 06:25:31,713 INFO L226 Difference]: Without dead ends: 10775 [2022-12-14 06:25:31,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:25:31,721 INFO L413 NwaCegarLoop]: 3283 mSDtfsCounter, 103 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:31,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6482 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:25:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-12-14 06:25:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 9491. [2022-12-14 06:25:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9491 states, 8139 states have (on average 1.5794323626981202) internal successors, (12855), 8174 states have internal predecessors, (12855), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-12-14 06:25:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 14625 transitions. [2022-12-14 06:25:32,063 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 14625 transitions. Word has length 135 [2022-12-14 06:25:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:32,063 INFO L495 AbstractCegarLoop]: Abstraction has 9491 states and 14625 transitions. [2022-12-14 06:25:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:25:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 14625 transitions. [2022-12-14 06:25:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:25:32,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:32,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:25:32,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:25:32,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:32,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1227513298, now seen corresponding path program 2 times [2022-12-14 06:25:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965032502] [2022-12-14 06:25:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:32,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:25:32,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965032502] [2022-12-14 06:25:32,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965032502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113775839] [2022-12-14 06:25:32,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:25:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:32,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e640e6e-d5af-44ce-a785-62ec1b39f2f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:25:32,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:25:32,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:25:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:25:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:25:32,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:25:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 06:25:33,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113775839] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:25:33,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715322275] [2022-12-14 06:25:33,170 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 06:25:33,170 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:25:33,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:25:33,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:25:33,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:25:53,501 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 78 for LOIs [2022-12-14 06:25:53,505 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-12-14 06:25:53,545 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-12-14 06:25:58,132 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12