./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS --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 a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 --- 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-8393723 [2022-11-19 08:10:33,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:10:33,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:10:33,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:10:33,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:10:33,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:10:33,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:10:33,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:10:33,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:10:33,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:10:33,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:10:33,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:10:33,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:10:33,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:10:33,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:10:33,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:10:33,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:10:33,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:10:33,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:10:33,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:10:33,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:10:33,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:10:33,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:10:33,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:10:33,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:10:33,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:10:33,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:10:33,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:10:33,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:10:33,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:10:33,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:10:33,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:10:33,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:10:33,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:10:33,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:10:33,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:10:33,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:10:33,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:10:33,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:10:33,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:10:33,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:10:33,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:10:33,840 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:10:33,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:10:33,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:10:33,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:10:33,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:10:33,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:10:33,844 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:10:33,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:10:33,845 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:10:33,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:10:33,847 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:10:33,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:10:33,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:10:33,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:10:33,848 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:10:33,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:10:33,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:10:33,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:10:33,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:10:33,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:10:33,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:10:33,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:10:33,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:10:33,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:10:33,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:10:33,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:10:33,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:10:33,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:10:33,854 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:10:33,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:10:33,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:10:33,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:10:33,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:33,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:10:33,857 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:10:33,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:10:33,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:10:33,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:10:33,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:10:33,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:10:33,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:10:33,859 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_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 [2022-11-19 08:10:34,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:10:34,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:10:34,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:10:34,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:10:34,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:10:34,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-19 08:10:34,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/data/0bb510b5d/89f5aa7d7e88498d91bc99a7af359274/FLAG0af679acf [2022-11-19 08:10:34,925 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:10:34,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-19 08:10:34,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/data/0bb510b5d/89f5aa7d7e88498d91bc99a7af359274/FLAG0af679acf [2022-11-19 08:10:35,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/data/0bb510b5d/89f5aa7d7e88498d91bc99a7af359274 [2022-11-19 08:10:35,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:10:35,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:10:35,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:35,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:10:35,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:10:35,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aee1394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35, skipping insertion in model container [2022-11-19 08:10:35,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:10:35,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:10:35,586 WARN L234 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_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-11-19 08:10:35,664 WARN L234 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_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-11-19 08:10:35,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:35,730 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:10:35,745 WARN L234 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_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-11-19 08:10:35,766 WARN L234 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_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-11-19 08:10:35,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:35,819 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:10:35,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35 WrapperNode [2022-11-19 08:10:35,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:35,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:35,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:10:35,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:10:35,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,925 INFO L138 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 581 [2022-11-19 08:10:35,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:35,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:10:35,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:10:35,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:10:35,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:35,999 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:36,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:36,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:10:36,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:10:36,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:10:36,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:10:36,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (1/1) ... [2022-11-19 08:10:36,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:36,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:10:36,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:10:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:10:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:10:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:10:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 08:10:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 08:10:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 08:10:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 08:10:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 08:10:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 08:10:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 08:10:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 08:10:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 08:10:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 08:10:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 08:10:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 08:10:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 08:10:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 08:10:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 08:10:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 08:10:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 08:10:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 08:10:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 08:10:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 08:10:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:10:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 08:10:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 08:10:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 08:10:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 08:10:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:10:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:10:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 08:10:36,120 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 08:10:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 08:10:36,120 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 08:10:36,296 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:10:36,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:10:37,147 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:10:37,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:10:37,542 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 08:10:37,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:37 BoogieIcfgContainer [2022-11-19 08:10:37,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:10:37,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:10:37,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:10:37,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:10:37,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:10:35" (1/3) ... [2022-11-19 08:10:37,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b026d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:37, skipping insertion in model container [2022-11-19 08:10:37,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:35" (2/3) ... [2022-11-19 08:10:37,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b026d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:37, skipping insertion in model container [2022-11-19 08:10:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:37" (3/3) ... [2022-11-19 08:10:37,561 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-19 08:10:37,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:10:37,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:10:37,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:10:37,681 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;@22652264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:10:37,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:10:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-19 08:10:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:10:37,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:37,706 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] [2022-11-19 08:10:37,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1303704914, now seen corresponding path program 1 times [2022-11-19 08:10:37,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:37,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194760743] [2022-11-19 08:10:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:37,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:38,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194760743] [2022-11-19 08:10:38,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194760743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:38,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:38,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:10:38,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858786186] [2022-11-19 08:10:38,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:38,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:10:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:10:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:10:38,643 INFO L87 Difference]: Start difference. First operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:10:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:39,705 INFO L93 Difference]: Finished difference Result 412 states and 586 transitions. [2022-11-19 08:10:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:10:39,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-19 08:10:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:39,740 INFO L225 Difference]: With dead ends: 412 [2022-11-19 08:10:39,743 INFO L226 Difference]: Without dead ends: 237 [2022-11-19 08:10:39,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:10:39,755 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 391 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:39,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 646 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:10:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-19 08:10:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-11-19 08:10:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 160 states have (on average 1.4125) internal successors, (226), 165 states have internal predecessors, (226), 42 states have call successors, (42), 22 states have call predecessors, (42), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 08:10:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-11-19 08:10:39,846 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 45 [2022-11-19 08:10:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:39,847 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-11-19 08:10:39,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:10:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-11-19 08:10:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:10:39,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:39,858 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] [2022-11-19 08:10:39,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:10:39,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 812664828, now seen corresponding path program 1 times [2022-11-19 08:10:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639236434] [2022-11-19 08:10:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:39,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:39,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639236434] [2022-11-19 08:10:39,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639236434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:39,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:39,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205570930] [2022-11-19 08:10:39,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:39,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:39,993 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:40,157 INFO L93 Difference]: Finished difference Result 449 states and 593 transitions. [2022-11-19 08:10:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-19 08:10:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:40,164 INFO L225 Difference]: With dead ends: 449 [2022-11-19 08:10:40,164 INFO L226 Difference]: Without dead ends: 333 [2022-11-19 08:10:40,170 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 [2022-11-19 08:10:40,172 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 217 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:40,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 272 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-19 08:10:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2022-11-19 08:10:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 225 states have (on average 1.36) internal successors, (306), 230 states have internal predecessors, (306), 58 states have call successors, (58), 36 states have call predecessors, (58), 34 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-19 08:10:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 418 transitions. [2022-11-19 08:10:40,248 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 418 transitions. Word has length 46 [2022-11-19 08:10:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:40,249 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 418 transitions. [2022-11-19 08:10:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 418 transitions. [2022-11-19 08:10:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 08:10:40,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:40,254 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] [2022-11-19 08:10:40,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:10:40,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1468698462, now seen corresponding path program 1 times [2022-11-19 08:10:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:40,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603397343] [2022-11-19 08:10:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:40,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603397343] [2022-11-19 08:10:40,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603397343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:40,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:40,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:10:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130041462] [2022-11-19 08:10:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:10:40,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:10:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:10:40,489 INFO L87 Difference]: Start difference. First operand 319 states and 418 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-19 08:10:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:41,301 INFO L93 Difference]: Finished difference Result 767 states and 1117 transitions. [2022-11-19 08:10:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:10:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 44 [2022-11-19 08:10:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:41,307 INFO L225 Difference]: With dead ends: 767 [2022-11-19 08:10:41,308 INFO L226 Difference]: Without dead ends: 669 [2022-11-19 08:10:41,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:41,318 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 713 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:41,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 774 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:10:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-19 08:10:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 656. [2022-11-19 08:10:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 485 states have (on average 1.4061855670103092) internal successors, (682), 493 states have internal predecessors, (682), 111 states have call successors, (111), 60 states have call predecessors, (111), 58 states have return successors, (137), 104 states have call predecessors, (137), 107 states have call successors, (137) [2022-11-19 08:10:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 930 transitions. [2022-11-19 08:10:41,421 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 930 transitions. Word has length 44 [2022-11-19 08:10:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:41,422 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 930 transitions. [2022-11-19 08:10:41,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-19 08:10:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 930 transitions. [2022-11-19 08:10:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:10:41,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:41,424 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] [2022-11-19 08:10:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:10:41,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1722193966, now seen corresponding path program 1 times [2022-11-19 08:10:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181231514] [2022-11-19 08:10:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:41,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:41,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181231514] [2022-11-19 08:10:41,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181231514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:41,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:41,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404366852] [2022-11-19 08:10:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:41,481 INFO L87 Difference]: Start difference. First operand 656 states and 930 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:41,677 INFO L93 Difference]: Finished difference Result 1020 states and 1378 transitions. [2022-11-19 08:10:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:41,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 08:10:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:41,689 INFO L225 Difference]: With dead ends: 1020 [2022-11-19 08:10:41,689 INFO L226 Difference]: Without dead ends: 810 [2022-11-19 08:10:41,690 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 [2022-11-19 08:10:41,701 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 68 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:41,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 392 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-19 08:10:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 806. [2022-11-19 08:10:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 590 states have (on average 1.3847457627118644) internal successors, (817), 598 states have internal predecessors, (817), 135 states have call successors, (135), 81 states have call predecessors, (135), 79 states have return successors, (161), 128 states have call predecessors, (161), 131 states have call successors, (161) [2022-11-19 08:10:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1113 transitions. [2022-11-19 08:10:41,809 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1113 transitions. Word has length 47 [2022-11-19 08:10:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:41,812 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1113 transitions. [2022-11-19 08:10:41,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1113 transitions. [2022-11-19 08:10:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 08:10:41,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:41,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:10:41,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash 829797201, now seen corresponding path program 1 times [2022-11-19 08:10:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112845986] [2022-11-19 08:10:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:41,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112845986] [2022-11-19 08:10:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112845986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:41,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:41,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706454614] [2022-11-19 08:10:41,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:41,898 INFO L87 Difference]: Start difference. First operand 806 states and 1113 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:42,117 INFO L93 Difference]: Finished difference Result 1230 states and 1635 transitions. [2022-11-19 08:10:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 08:10:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:42,123 INFO L225 Difference]: With dead ends: 1230 [2022-11-19 08:10:42,123 INFO L226 Difference]: Without dead ends: 869 [2022-11-19 08:10:42,124 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 [2022-11-19 08:10:42,125 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 217 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:42,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 279 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-19 08:10:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 857. [2022-11-19 08:10:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 626 states have (on average 1.3722044728434504) internal successors, (859), 634 states have internal predecessors, (859), 143 states have call successors, (143), 88 states have call predecessors, (143), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-19 08:10:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1171 transitions. [2022-11-19 08:10:42,224 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1171 transitions. Word has length 53 [2022-11-19 08:10:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:42,225 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1171 transitions. [2022-11-19 08:10:42,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:10:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1171 transitions. [2022-11-19 08:10:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:10:42,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:42,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:42,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:10:42,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -562461094, now seen corresponding path program 1 times [2022-11-19 08:10:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289942993] [2022-11-19 08:10:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:42,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289942993] [2022-11-19 08:10:42,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289942993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:42,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:42,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:10:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558907564] [2022-11-19 08:10:42,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:42,311 INFO L87 Difference]: Start difference. First operand 857 states and 1171 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:10:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:42,686 INFO L93 Difference]: Finished difference Result 966 states and 1303 transitions. [2022-11-19 08:10:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:10:42,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 08:10:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:42,695 INFO L225 Difference]: With dead ends: 966 [2022-11-19 08:10:42,696 INFO L226 Difference]: Without dead ends: 963 [2022-11-19 08:10:42,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:10:42,698 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 392 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:42,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 258 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:10:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-19 08:10:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 856. [2022-11-19 08:10:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 626 states have (on average 1.3674121405750799) internal successors, (856), 633 states have internal predecessors, (856), 142 states have call successors, (142), 88 states have call predecessors, (142), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-19 08:10:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1167 transitions. [2022-11-19 08:10:42,829 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1167 transitions. Word has length 54 [2022-11-19 08:10:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:42,830 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1167 transitions. [2022-11-19 08:10:42,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:10:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1167 transitions. [2022-11-19 08:10:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:10:42,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:42,832 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:42,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:10:42,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -257299269, now seen corresponding path program 1 times [2022-11-19 08:10:42,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:42,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38227184] [2022-11-19 08:10:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:43,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:43,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38227184] [2022-11-19 08:10:43,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38227184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:43,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145230401] [2022-11-19 08:10:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:43,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:43,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:43,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:43,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:10:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:10:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:43,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145230401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538947019] [2022-11-19 08:10:43,840 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:10:43,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:43,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:43,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:43,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:46,988 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-19 08:10:47,053 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-11-19 08:10:47,078 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-19 08:10:47,480 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-19 08:10:47,548 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-19 08:10:47,598 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-19 08:10:47,618 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-19 08:10:47,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:11:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [538947019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:03,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:11:03,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-19 08:11:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125718874] [2022-11-19 08:11:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:11:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:11:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:11:03,610 INFO L87 Difference]: Start difference. First operand 856 states and 1167 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:11:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:27,876 INFO L93 Difference]: Finished difference Result 1315 states and 1714 transitions. [2022-11-19 08:11:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:11:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-19 08:11:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:27,882 INFO L225 Difference]: With dead ends: 1315 [2022-11-19 08:11:27,882 INFO L226 Difference]: Without dead ends: 905 [2022-11-19 08:11:27,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 08:11:27,886 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 173 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 4732 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:27,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 2577 Invalid, 4895 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [163 Valid, 4732 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-19 08:11:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-19 08:11:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 890. [2022-11-19 08:11:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 652 states have (on average 1.3558282208588956) internal successors, (884), 659 states have internal predecessors, (884), 144 states have call successors, (144), 94 states have call predecessors, (144), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2022-11-19 08:11:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1199 transitions. [2022-11-19 08:11:27,990 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1199 transitions. Word has length 55 [2022-11-19 08:11:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:27,990 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1199 transitions. [2022-11-19 08:11:27,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:11:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1199 transitions. [2022-11-19 08:11:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:11:27,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:27,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:27,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:11:28,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash -802950204, now seen corresponding path program 1 times [2022-11-19 08:11:28,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:28,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967212347] [2022-11-19 08:11:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:11:28,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967212347] [2022-11-19 08:11:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967212347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:28,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107161646] [2022-11-19 08:11:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:28,278 INFO L87 Difference]: Start difference. First operand 890 states and 1199 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-19 08:11:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:28,485 INFO L93 Difference]: Finished difference Result 1341 states and 1755 transitions. [2022-11-19 08:11:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2022-11-19 08:11:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:28,497 INFO L225 Difference]: With dead ends: 1341 [2022-11-19 08:11:28,497 INFO L226 Difference]: Without dead ends: 1073 [2022-11-19 08:11:28,498 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 [2022-11-19 08:11:28,499 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:28,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 439 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:11:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-19 08:11:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 944. [2022-11-19 08:11:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 696 states have (on average 1.3548850574712643) internal successors, (943), 703 states have internal predecessors, (943), 149 states have call successors, (149), 99 states have call predecessors, (149), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2022-11-19 08:11:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1268 transitions. [2022-11-19 08:11:28,620 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1268 transitions. Word has length 61 [2022-11-19 08:11:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:28,621 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1268 transitions. [2022-11-19 08:11:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-19 08:11:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1268 transitions. [2022-11-19 08:11:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:11:28,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:28,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:11:28,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash -926220964, now seen corresponding path program 1 times [2022-11-19 08:11:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908846217] [2022-11-19 08:11:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:11:28,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908846217] [2022-11-19 08:11:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908846217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:28,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:28,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:11:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073904704] [2022-11-19 08:11:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:11:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:11:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:11:28,811 INFO L87 Difference]: Start difference. First operand 944 states and 1268 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:11:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:29,513 INFO L93 Difference]: Finished difference Result 1624 states and 2085 transitions. [2022-11-19 08:11:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:11:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-19 08:11:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:29,522 INFO L225 Difference]: With dead ends: 1624 [2022-11-19 08:11:29,522 INFO L226 Difference]: Without dead ends: 1207 [2022-11-19 08:11:29,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:11:29,527 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 352 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:29,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 602 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:11:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-19 08:11:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1172. [2022-11-19 08:11:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 849 states have (on average 1.3262661955241462) internal successors, (1126), 856 states have internal predecessors, (1126), 189 states have call successors, (189), 134 states have call predecessors, (189), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2022-11-19 08:11:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1531 transitions. [2022-11-19 08:11:29,688 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1531 transitions. Word has length 63 [2022-11-19 08:11:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:29,689 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1531 transitions. [2022-11-19 08:11:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:11:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1531 transitions. [2022-11-19 08:11:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:11:29,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:29,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:29,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:11:29,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1131049379, now seen corresponding path program 1 times [2022-11-19 08:11:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:29,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67222043] [2022-11-19 08:11:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:11:29,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67222043] [2022-11-19 08:11:29,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67222043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318057820] [2022-11-19 08:11:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:29,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:29,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:29,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:11:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:11:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:11:30,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:11:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318057820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:30,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343433781] [2022-11-19 08:11:30,481 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:11:30,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:11:30,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:11:30,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:11:30,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:11:35,817 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-19 08:11:35,832 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-19 08:11:35,865 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 164 for LOIs [2022-11-19 08:11:35,905 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-19 08:11:36,171 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-19 08:11:36,202 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-19 08:11:36,232 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-19 08:11:36,247 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-19 08:11:36,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:11:56,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24278#(and (= ~q_req_up~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:11:56,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:11:56,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:11:56,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 08:11:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742412911] [2022-11-19 08:11:56,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:56,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:11:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:11:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:11:56,122 INFO L87 Difference]: Start difference. First operand 1172 states and 1531 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:11:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:56,912 INFO L93 Difference]: Finished difference Result 2717 states and 3398 transitions. [2022-11-19 08:11:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:11:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-19 08:11:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:56,933 INFO L225 Difference]: With dead ends: 2717 [2022-11-19 08:11:56,933 INFO L226 Difference]: Without dead ends: 2714 [2022-11-19 08:11:56,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:11:56,937 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 480 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:56,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1022 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:11:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-11-19 08:11:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1912. [2022-11-19 08:11:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1367 states have (on average 1.3050475493782003) internal successors, (1784), 1374 states have internal predecessors, (1784), 307 states have call successors, (307), 238 states have call predecessors, (307), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2022-11-19 08:11:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2425 transitions. [2022-11-19 08:11:57,250 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2425 transitions. Word has length 64 [2022-11-19 08:11:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:57,251 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 2425 transitions. [2022-11-19 08:11:57,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:11:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2425 transitions. [2022-11-19 08:11:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:11:57,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:57,255 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:57,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:57,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:57,462 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash -875100124, now seen corresponding path program 2 times [2022-11-19 08:11:57,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:57,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133007762] [2022-11-19 08:11:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:11:57,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133007762] [2022-11-19 08:11:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133007762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:57,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:57,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827482686] [2022-11-19 08:11:57,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:57,509 INFO L87 Difference]: Start difference. First operand 1912 states and 2425 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-19 08:11:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:57,814 INFO L93 Difference]: Finished difference Result 2680 states and 3357 transitions. [2022-11-19 08:11:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2022-11-19 08:11:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:57,823 INFO L225 Difference]: With dead ends: 2680 [2022-11-19 08:11:57,823 INFO L226 Difference]: Without dead ends: 1490 [2022-11-19 08:11:57,827 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 [2022-11-19 08:11:57,828 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 217 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:57,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 315 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:11:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-19 08:11:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1480. [2022-11-19 08:11:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1063 states have (on average 1.303857008466604) internal successors, (1386), 1070 states have internal predecessors, (1386), 239 states have call successors, (239), 178 states have call predecessors, (239), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2022-11-19 08:11:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1891 transitions. [2022-11-19 08:11:58,086 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1891 transitions. Word has length 67 [2022-11-19 08:11:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:58,086 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 1891 transitions. [2022-11-19 08:11:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-19 08:11:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1891 transitions. [2022-11-19 08:11:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:11:58,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:58,089 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:58,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:11:58,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -20305958, now seen corresponding path program 1 times [2022-11-19 08:11:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:58,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243986004] [2022-11-19 08:11:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:11:58,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243986004] [2022-11-19 08:11:58,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243986004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:58,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:58,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141736871] [2022-11-19 08:11:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:58,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:58,146 INFO L87 Difference]: Start difference. First operand 1480 states and 1891 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-19 08:11:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:58,459 INFO L93 Difference]: Finished difference Result 2511 states and 3124 transitions. [2022-11-19 08:11:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 71 [2022-11-19 08:11:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:58,469 INFO L225 Difference]: With dead ends: 2511 [2022-11-19 08:11:58,469 INFO L226 Difference]: Without dead ends: 1654 [2022-11-19 08:11:58,472 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 [2022-11-19 08:11:58,473 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:58,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 430 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:11:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-11-19 08:11:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1525. [2022-11-19 08:11:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1100 states have (on average 1.3) internal successors, (1430), 1107 states have internal predecessors, (1430), 243 states have call successors, (243), 182 states have call predecessors, (243), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2022-11-19 08:11:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1943 transitions. [2022-11-19 08:11:58,716 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1943 transitions. Word has length 71 [2022-11-19 08:11:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:58,717 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 1943 transitions. [2022-11-19 08:11:58,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-19 08:11:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1943 transitions. [2022-11-19 08:11:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:11:58,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:58,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:58,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:11:58,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash -729284993, now seen corresponding path program 1 times [2022-11-19 08:11:58,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:58,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192410602] [2022-11-19 08:11:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:58,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:11:58,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192410602] [2022-11-19 08:11:58,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192410602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613528934] [2022-11-19 08:11:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:58,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:58,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:58,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:58,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:11:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:11:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:11:59,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:11:59,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613528934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:59,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:11:59,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:11:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662707365] [2022-11-19 08:11:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:11:59,056 INFO L87 Difference]: Start difference. First operand 1525 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-19 08:11:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:59,413 INFO L93 Difference]: Finished difference Result 2379 states and 3279 transitions. [2022-11-19 08:11:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 81 [2022-11-19 08:11:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:59,426 INFO L225 Difference]: With dead ends: 2379 [2022-11-19 08:11:59,426 INFO L226 Difference]: Without dead ends: 1944 [2022-11-19 08:11:59,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:11:59,431 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:11:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-11-19 08:11:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1935. [2022-11-19 08:11:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1418 states have (on average 1.3293370944992948) internal successors, (1885), 1428 states have internal predecessors, (1885), 305 states have call successors, (305), 212 states have call predecessors, (305), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2022-11-19 08:11:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2022-11-19 08:11:59,763 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 81 [2022-11-19 08:11:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:59,763 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2022-11-19 08:11:59,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-19 08:11:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2022-11-19 08:11:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:11:59,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:59,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:59,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:11:59,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 366430879, now seen corresponding path program 1 times [2022-11-19 08:11:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:59,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564474898] [2022-11-19 08:11:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:59,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:12:00,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564474898] [2022-11-19 08:12:00,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564474898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729580363] [2022-11-19 08:12:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:00,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:00,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:00,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:00,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:12:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:12:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:00,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:00,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729580363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:00,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:12:00,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:12:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511923935] [2022-11-19 08:12:00,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:12:00,310 INFO L87 Difference]: Start difference. First operand 1935 states and 2548 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-19 08:12:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:00,778 INFO L93 Difference]: Finished difference Result 3594 states and 5114 transitions. [2022-11-19 08:12:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 81 [2022-11-19 08:12:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:00,794 INFO L225 Difference]: With dead ends: 3594 [2022-11-19 08:12:00,794 INFO L226 Difference]: Without dead ends: 2749 [2022-11-19 08:12:00,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:12:00,799 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:00,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-11-19 08:12:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2735. [2022-11-19 08:12:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2039 states have (on average 1.356056890632663) internal successors, (2765), 2055 states have internal predecessors, (2765), 424 states have call successors, (424), 272 states have call predecessors, (424), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2022-11-19 08:12:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3714 transitions. [2022-11-19 08:12:01,184 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3714 transitions. Word has length 81 [2022-11-19 08:12:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:01,184 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 3714 transitions. [2022-11-19 08:12:01,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-19 08:12:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3714 transitions. [2022-11-19 08:12:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:12:01,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:01,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:01,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:12:01,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1086524031, now seen corresponding path program 1 times [2022-11-19 08:12:01,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:01,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476541436] [2022-11-19 08:12:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:12:01,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476541436] [2022-11-19 08:12:01,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476541436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:01,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:01,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:01,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490655966] [2022-11-19 08:12:01,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:01,478 INFO L87 Difference]: Start difference. First operand 2735 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-19 08:12:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:01,964 INFO L93 Difference]: Finished difference Result 4435 states and 6329 transitions. [2022-11-19 08:12:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 81 [2022-11-19 08:12:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:01,984 INFO L225 Difference]: With dead ends: 4435 [2022-11-19 08:12:01,984 INFO L226 Difference]: Without dead ends: 3111 [2022-11-19 08:12:01,990 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 [2022-11-19 08:12:01,991 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 56 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:01,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 459 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-19 08:12:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2939. [2022-11-19 08:12:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2227 states have (on average 1.3834755276156263) internal successors, (3081), 2243 states have internal predecessors, (3081), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-19 08:12:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4046 transitions. [2022-11-19 08:12:02,429 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4046 transitions. Word has length 81 [2022-11-19 08:12:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:02,430 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 4046 transitions. [2022-11-19 08:12:02,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-19 08:12:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4046 transitions. [2022-11-19 08:12:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:12:02,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:02,440 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:02,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:12:02,441 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:02,441 INFO L85 PathProgramCache]: Analyzing trace with hash -549750117, now seen corresponding path program 1 times [2022-11-19 08:12:02,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:02,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074260932] [2022-11-19 08:12:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:02,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:12:02,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074260932] [2022-11-19 08:12:02,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074260932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005452027] [2022-11-19 08:12:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:02,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:02,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:02,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:02,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:12:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:12:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:03,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005452027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:03,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:12:03,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-19 08:12:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792489126] [2022-11-19 08:12:03,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:03,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:12:03,136 INFO L87 Difference]: Start difference. First operand 2939 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:03,606 INFO L93 Difference]: Finished difference Result 3768 states and 5064 transitions. [2022-11-19 08:12:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 08:12:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:03,623 INFO L225 Difference]: With dead ends: 3768 [2022-11-19 08:12:03,623 INFO L226 Difference]: Without dead ends: 2968 [2022-11-19 08:12:03,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:12:03,628 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:03,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 442 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-11-19 08:12:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2935. [2022-11-19 08:12:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2223 states have (on average 1.369770580296896) internal successors, (3045), 2239 states have internal predecessors, (3045), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-19 08:12:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4010 transitions. [2022-11-19 08:12:04,166 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4010 transitions. Word has length 102 [2022-11-19 08:12:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:04,167 INFO L495 AbstractCegarLoop]: Abstraction has 2935 states and 4010 transitions. [2022-11-19 08:12:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4010 transitions. [2022-11-19 08:12:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:12:04,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:04,174 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:04,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:12:04,388 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1026807642, now seen corresponding path program 1 times [2022-11-19 08:12:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128537012] [2022-11-19 08:12:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:12:04,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128537012] [2022-11-19 08:12:04,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128537012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774743570] [2022-11-19 08:12:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:04,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:04,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:04,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:04,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:12:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:12:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:05,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:05,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774743570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:05,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:12:05,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 08:12:05,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399203324] [2022-11-19 08:12:05,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:05,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:05,075 INFO L87 Difference]: Start difference. First operand 2935 states and 4010 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:05,694 INFO L93 Difference]: Finished difference Result 3819 states and 5080 transitions. [2022-11-19 08:12:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:12:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 08:12:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:05,718 INFO L225 Difference]: With dead ends: 3819 [2022-11-19 08:12:05,719 INFO L226 Difference]: Without dead ends: 2766 [2022-11-19 08:12:05,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:12:05,723 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 209 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:05,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 989 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-11-19 08:12:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2569. [2022-11-19 08:12:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 1989 states have (on average 1.3926596279537455) internal successors, (2770), 2005 states have internal predecessors, (2770), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-11-19 08:12:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3593 transitions. [2022-11-19 08:12:06,087 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3593 transitions. Word has length 102 [2022-11-19 08:12:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:06,088 INFO L495 AbstractCegarLoop]: Abstraction has 2569 states and 3593 transitions. [2022-11-19 08:12:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3593 transitions. [2022-11-19 08:12:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:12:06,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:06,096 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:12:06,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1000272319, now seen corresponding path program 1 times [2022-11-19 08:12:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825361974] [2022-11-19 08:12:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:12:06,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:06,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825361974] [2022-11-19 08:12:06,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825361974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:06,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867666156] [2022-11-19 08:12:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:06,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:06,387 INFO L87 Difference]: Start difference. First operand 2569 states and 3593 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 08:12:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:06,942 INFO L93 Difference]: Finished difference Result 3188 states and 4335 transitions. [2022-11-19 08:12:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-19 08:12:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:06,964 INFO L225 Difference]: With dead ends: 3188 [2022-11-19 08:12:06,965 INFO L226 Difference]: Without dead ends: 2568 [2022-11-19 08:12:06,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:06,968 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 269 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:06,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 395 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2022-11-19 08:12:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2559. [2022-11-19 08:12:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1979 states have (on average 1.3815058110156644) internal successors, (2734), 1995 states have internal predecessors, (2734), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-11-19 08:12:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3557 transitions. [2022-11-19 08:12:07,374 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3557 transitions. Word has length 112 [2022-11-19 08:12:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:07,375 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3557 transitions. [2022-11-19 08:12:07,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 08:12:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3557 transitions. [2022-11-19 08:12:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:12:07,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:07,385 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:12:07,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash 893169856, now seen corresponding path program 1 times [2022-11-19 08:12:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:07,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93858828] [2022-11-19 08:12:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:07,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:12:07,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93858828] [2022-11-19 08:12:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93858828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407137415] [2022-11-19 08:12:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:07,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:07,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:07,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:12:07,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:12:07,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407137415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:07,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:12:07,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 08:12:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703666479] [2022-11-19 08:12:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:12:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:12:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:07,829 INFO L87 Difference]: Start difference. First operand 2559 states and 3557 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:08,446 INFO L93 Difference]: Finished difference Result 3108 states and 4182 transitions. [2022-11-19 08:12:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 08:12:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:08,458 INFO L225 Difference]: With dead ends: 3108 [2022-11-19 08:12:08,458 INFO L226 Difference]: Without dead ends: 2515 [2022-11-19 08:12:08,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:08,462 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 67 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:08,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1339 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-11-19 08:12:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2423. [2022-11-19 08:12:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 1879 states have (on average 1.3927621075039915) internal successors, (2617), 1895 states have internal predecessors, (2617), 342 states have call successors, (342), 202 states have call predecessors, (342), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2022-11-19 08:12:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3402 transitions. [2022-11-19 08:12:08,963 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3402 transitions. Word has length 112 [2022-11-19 08:12:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:08,964 INFO L495 AbstractCegarLoop]: Abstraction has 2423 states and 3402 transitions. [2022-11-19 08:12:08,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:12:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3402 transitions. [2022-11-19 08:12:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:12:08,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:08,975 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:08,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:09,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:09,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:09,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1972336602, now seen corresponding path program 1 times [2022-11-19 08:12:09,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:09,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761093300] [2022-11-19 08:12:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:12:09,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761093300] [2022-11-19 08:12:09,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761093300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:09,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794558376] [2022-11-19 08:12:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:09,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:12:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:12:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:12:09,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:09,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794558376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:09,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:12:09,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 08:12:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399669368] [2022-11-19 08:12:09,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:09,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:09,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:09,670 INFO L87 Difference]: Start difference. First operand 2423 states and 3402 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:12:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:10,179 INFO L93 Difference]: Finished difference Result 3172 states and 4247 transitions. [2022-11-19 08:12:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 08:12:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:10,191 INFO L225 Difference]: With dead ends: 3172 [2022-11-19 08:12:10,191 INFO L226 Difference]: Without dead ends: 2715 [2022-11-19 08:12:10,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:12:10,195 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 193 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:10,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 998 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2022-11-19 08:12:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2681. [2022-11-19 08:12:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2041 states have (on average 1.370406663400294) internal successors, (2797), 2063 states have internal predecessors, (2797), 390 states have call successors, (390), 244 states have call predecessors, (390), 248 states have return successors, (503), 375 states have call predecessors, (503), 387 states have call successors, (503) [2022-11-19 08:12:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3690 transitions. [2022-11-19 08:12:10,516 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3690 transitions. Word has length 113 [2022-11-19 08:12:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:10,516 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3690 transitions. [2022-11-19 08:12:10,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:12:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3690 transitions. [2022-11-19 08:12:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 08:12:10,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:10,526 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:12:10,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:10,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:10,738 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1479902674, now seen corresponding path program 1 times [2022-11-19 08:12:10,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640780908] [2022-11-19 08:12:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 08:12:10,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640780908] [2022-11-19 08:12:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640780908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590963688] [2022-11-19 08:12:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:10,825 INFO L87 Difference]: Start difference. First operand 2681 states and 3690 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-19 08:12:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:11,497 INFO L93 Difference]: Finished difference Result 6290 states and 9227 transitions. [2022-11-19 08:12:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 107 [2022-11-19 08:12:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:11,522 INFO L225 Difference]: With dead ends: 6290 [2022-11-19 08:12:11,522 INFO L226 Difference]: Without dead ends: 4441 [2022-11-19 08:12:11,531 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 [2022-11-19 08:12:11,532 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 205 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:11,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 323 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2022-11-19 08:12:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4409. [2022-11-19 08:12:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 3405 states have (on average 1.3923641703377385) internal successors, (4741), 3439 states have internal predecessors, (4741), 626 states have call successors, (626), 372 states have call predecessors, (626), 376 states have return successors, (827), 599 states have call predecessors, (827), 623 states have call successors, (827) [2022-11-19 08:12:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 6194 transitions. [2022-11-19 08:12:12,118 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 6194 transitions. Word has length 107 [2022-11-19 08:12:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:12,119 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 6194 transitions. [2022-11-19 08:12:12,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-19 08:12:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 6194 transitions. [2022-11-19 08:12:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:12:12,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:12,134 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:12:12,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1731962658, now seen corresponding path program 1 times [2022-11-19 08:12:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164617687] [2022-11-19 08:12:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:12:13,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164617687] [2022-11-19 08:12:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164617687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784646207] [2022-11-19 08:12:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:13,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:13,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:13,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:12:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:13,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:12:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:14,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:12:16,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784646207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:16,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488359749] [2022-11-19 08:12:16,730 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 08:12:16,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:16,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:16,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:16,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:41,099 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-19 08:12:41,370 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-19 08:12:41,402 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 154 for LOIs [2022-11-19 08:12:41,440 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-19 08:12:42,548 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-19 08:12:42,699 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2022-11-19 08:12:42,821 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-19 08:12:43,339 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-19 08:12:43,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:23,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130753#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:23,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:23,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 08:13:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527771823] [2022-11-19 08:13:23,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:13:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:13:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10763, Unknown=0, NotChecked=0, Total=11556 [2022-11-19 08:13:23,607 INFO L87 Difference]: Start difference. First operand 4409 states and 6194 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 08:13:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:48,329 INFO L93 Difference]: Finished difference Result 6920 states and 9110 transitions. [2022-11-19 08:13:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 08:13:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-19 08:13:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:48,352 INFO L225 Difference]: With dead ends: 6920 [2022-11-19 08:13:48,353 INFO L226 Difference]: Without dead ends: 6205 [2022-11-19 08:13:48,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44277 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=10080, Invalid=99812, Unknown=0, NotChecked=0, Total=109892 [2022-11-19 08:13:48,375 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 4873 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 7297 mSolverCounterSat, 2600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4873 SdHoareTripleChecker+Valid, 2818 SdHoareTripleChecker+Invalid, 9897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2600 IncrementalHoareTripleChecker+Valid, 7297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:48,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4873 Valid, 2818 Invalid, 9897 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2600 Valid, 7297 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 08:13:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2022-11-19 08:13:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 4685. [2022-11-19 08:13:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3589 states have (on average 1.379771524101421) internal successors, (4952), 3625 states have internal predecessors, (4952), 671 states have call successors, (671), 409 states have call predecessors, (671), 423 states have return successors, (884), 652 states have call predecessors, (884), 668 states have call successors, (884) [2022-11-19 08:13:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6507 transitions. [2022-11-19 08:13:48,992 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6507 transitions. Word has length 114 [2022-11-19 08:13:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:48,993 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 6507 transitions. [2022-11-19 08:13:48,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 08:13:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6507 transitions. [2022-11-19 08:13:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 08:13:49,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:49,005 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:49,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:49,211 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1117241275, now seen corresponding path program 1 times [2022-11-19 08:13:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323892881] [2022-11-19 08:13:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:13:49,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323892881] [2022-11-19 08:13:49,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323892881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788257693] [2022-11-19 08:13:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:49,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:49,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:49,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:49,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:13:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:13:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:13:49,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:13:50,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788257693] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:50,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:50,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 08:13:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325587559] [2022-11-19 08:13:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:13:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:13:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:13:50,072 INFO L87 Difference]: Start difference. First operand 4685 states and 6507 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:13:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:51,412 INFO L93 Difference]: Finished difference Result 6009 states and 8055 transitions. [2022-11-19 08:13:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:13:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 08:13:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:51,432 INFO L225 Difference]: With dead ends: 6009 [2022-11-19 08:13:51,433 INFO L226 Difference]: Without dead ends: 5018 [2022-11-19 08:13:51,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:13:51,439 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 312 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:51,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 665 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:13:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-11-19 08:13:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 4765. [2022-11-19 08:13:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 3634 states have (on average 1.3767198679141441) internal successors, (5003), 3673 states have internal predecessors, (5003), 690 states have call successors, (690), 418 states have call predecessors, (690), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2022-11-19 08:13:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 6617 transitions. [2022-11-19 08:13:52,247 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 6617 transitions. Word has length 115 [2022-11-19 08:13:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:52,247 INFO L495 AbstractCegarLoop]: Abstraction has 4765 states and 6617 transitions. [2022-11-19 08:13:52,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:13:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 6617 transitions. [2022-11-19 08:13:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:13:52,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:52,264 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:52,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:52,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 08:13:52,470 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1467232233, now seen corresponding path program 1 times [2022-11-19 08:13:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:52,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684340507] [2022-11-19 08:13:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:52,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:13:53,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684340507] [2022-11-19 08:13:53,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684340507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842382721] [2022-11-19 08:13:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:53,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:53,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:53,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:13:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 08:13:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:13:54,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:13:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842382721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:56,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102701844] [2022-11-19 08:13:56,636 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 08:13:56,636 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:56,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:56,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:56,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:03,691 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-19 08:14:04,091 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 161 for LOIs [2022-11-19 08:14:04,120 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 80 for LOIs [2022-11-19 08:14:04,126 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-19 08:14:05,300 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-19 08:14:05,438 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 80 for LOIs [2022-11-19 08:14:05,602 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-19 08:14:06,073 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-19 08:14:06,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:42,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165091#(and (= ~q_req_up~0 1) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:14:42,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:42,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:42,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 08:14:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926928482] [2022-11-19 08:14:42,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 08:14:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 08:14:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-11-19 08:14:42,802 INFO L87 Difference]: Start difference. First operand 4765 states and 6617 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 08:15:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:00,682 INFO L93 Difference]: Finished difference Result 7049 states and 9319 transitions. [2022-11-19 08:15:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 08:15:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-19 08:15:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:00,702 INFO L225 Difference]: With dead ends: 7049 [2022-11-19 08:15:00,702 INFO L226 Difference]: Without dead ends: 5978 [2022-11-19 08:15:00,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26860 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-11-19 08:15:00,712 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 4825 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 8061 mSolverCounterSat, 3381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4825 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 11442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3381 IncrementalHoareTripleChecker+Valid, 8061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:00,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4825 Valid, 2875 Invalid, 11442 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3381 Valid, 8061 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-19 08:15:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2022-11-19 08:15:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4581. [2022-11-19 08:15:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 3522 states have (on average 1.3841567291311754) internal successors, (4875), 3560 states have internal predecessors, (4875), 650 states have call successors, (650), 386 states have call predecessors, (650), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2022-11-19 08:15:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 6399 transitions. [2022-11-19 08:15:01,515 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 6399 transitions. Word has length 124 [2022-11-19 08:15:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:01,515 INFO L495 AbstractCegarLoop]: Abstraction has 4581 states and 6399 transitions. [2022-11-19 08:15:01,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 08:15:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 6399 transitions. [2022-11-19 08:15:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:15:01,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:01,529 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:01,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:15:01,735 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1169428116, now seen corresponding path program 1 times [2022-11-19 08:15:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881635775] [2022-11-19 08:15:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:15:01,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881635775] [2022-11-19 08:15:01,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881635775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259715233] [2022-11-19 08:15:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:01,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:01,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:15:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:02,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:15:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:15:02,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:15:02,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259715233] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:02,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:15:02,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 08:15:02,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360039383] [2022-11-19 08:15:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:15:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:15:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:15:02,466 INFO L87 Difference]: Start difference. First operand 4581 states and 6399 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:15:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:03,856 INFO L93 Difference]: Finished difference Result 5236 states and 7140 transitions. [2022-11-19 08:15:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:15:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 08:15:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:03,872 INFO L225 Difference]: With dead ends: 5236 [2022-11-19 08:15:03,873 INFO L226 Difference]: Without dead ends: 4349 [2022-11-19 08:15:03,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:15:03,877 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 470 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:03,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 591 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:15:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2022-11-19 08:15:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4312. [2022-11-19 08:15:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 3323 states have (on average 1.393319289798375) internal successors, (4630), 3361 states have internal predecessors, (4630), 614 states have call successors, (614), 356 states have call predecessors, (614), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2022-11-19 08:15:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6077 transitions. [2022-11-19 08:15:04,551 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6077 transitions. Word has length 125 [2022-11-19 08:15:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:04,552 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6077 transitions. [2022-11-19 08:15:04,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:15:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6077 transitions. [2022-11-19 08:15:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:15:04,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:04,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:04,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:04,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:04,772 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:04,773 INFO L85 PathProgramCache]: Analyzing trace with hash 597626421, now seen corresponding path program 1 times [2022-11-19 08:15:04,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:04,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399560698] [2022-11-19 08:15:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 08:15:04,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399560698] [2022-11-19 08:15:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399560698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051336960] [2022-11-19 08:15:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:04,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:04,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:15:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:15:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:15:05,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:05,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051336960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:05,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:05,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:15:05,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501296457] [2022-11-19 08:15:05,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:05,116 INFO L87 Difference]: Start difference. First operand 4312 states and 6077 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-19 08:15:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:05,982 INFO L93 Difference]: Finished difference Result 7317 states and 10496 transitions. [2022-11-19 08:15:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 124 [2022-11-19 08:15:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:06,002 INFO L225 Difference]: With dead ends: 7317 [2022-11-19 08:15:06,002 INFO L226 Difference]: Without dead ends: 5197 [2022-11-19 08:15:06,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:06,013 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:06,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 241 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:15:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2022-11-19 08:15:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 5197. [2022-11-19 08:15:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 4093 states have (on average 1.3642804788663572) internal successors, (5584), 4131 states have internal predecessors, (5584), 651 states have call successors, (651), 433 states have call predecessors, (651), 451 states have return successors, (900), 634 states have call predecessors, (900), 648 states have call successors, (900) [2022-11-19 08:15:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 7135 transitions. [2022-11-19 08:15:06,885 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 7135 transitions. Word has length 124 [2022-11-19 08:15:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:06,886 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 7135 transitions. [2022-11-19 08:15:06,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-19 08:15:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 7135 transitions. [2022-11-19 08:15:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:15:06,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:06,900 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:06,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:07,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 08:15:07,107 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 540482196, now seen corresponding path program 1 times [2022-11-19 08:15:07,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:07,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860624764] [2022-11-19 08:15:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 08:15:07,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860624764] [2022-11-19 08:15:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860624764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885896707] [2022-11-19 08:15:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:07,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:07,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:07,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:15:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:07,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:15:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:15:07,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:07,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885896707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:07,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:07,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:15:07,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520416459] [2022-11-19 08:15:07,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:07,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:07,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:07,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:07,428 INFO L87 Difference]: Start difference. First operand 5197 states and 7135 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-11-19 08:15:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:08,538 INFO L93 Difference]: Finished difference Result 9198 states and 12997 transitions. [2022-11-19 08:15:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2022-11-19 08:15:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:08,557 INFO L225 Difference]: With dead ends: 9198 [2022-11-19 08:15:08,557 INFO L226 Difference]: Without dead ends: 6908 [2022-11-19 08:15:08,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:08,565 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 89 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:08,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 477 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:15:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2022-11-19 08:15:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 5795. [2022-11-19 08:15:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 4635 states have (on average 1.397195253505933) internal successors, (6476), 4673 states have internal predecessors, (6476), 679 states have call successors, (679), 461 states have call predecessors, (679), 479 states have return successors, (928), 662 states have call predecessors, (928), 676 states have call successors, (928) [2022-11-19 08:15:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8083 transitions. [2022-11-19 08:15:09,551 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8083 transitions. Word has length 124 [2022-11-19 08:15:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:09,551 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8083 transitions. [2022-11-19 08:15:09,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-11-19 08:15:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8083 transitions. [2022-11-19 08:15:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:15:09,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:09,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:09,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 08:15:09,770 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -373576570, now seen corresponding path program 2 times [2022-11-19 08:15:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108663952] [2022-11-19 08:15:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 08:15:09,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108663952] [2022-11-19 08:15:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108663952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800790973] [2022-11-19 08:15:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:10,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:10,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:15:10,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:15:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:10,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:15:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:15:10,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800790973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:10,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:10,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:15:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407975955] [2022-11-19 08:15:10,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:15:10,194 INFO L87 Difference]: Start difference. First operand 5795 states and 8083 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:15:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:11,387 INFO L93 Difference]: Finished difference Result 10960 states and 15854 transitions. [2022-11-19 08:15:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:11,387 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-19 08:15:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:11,410 INFO L225 Difference]: With dead ends: 10960 [2022-11-19 08:15:11,410 INFO L226 Difference]: Without dead ends: 7957 [2022-11-19 08:15:11,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:15:11,424 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 111 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:11,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 487 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:15:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-11-19 08:15:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7809. [2022-11-19 08:15:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6286 states have (on average 1.4000954502068088) internal successors, (8801), 6332 states have internal predecessors, (8801), 897 states have call successors, (897), 607 states have call predecessors, (897), 624 states have return successors, (1341), 871 states have call predecessors, (1341), 894 states have call successors, (1341) [2022-11-19 08:15:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 11039 transitions. [2022-11-19 08:15:12,822 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 11039 transitions. Word has length 124 [2022-11-19 08:15:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:12,823 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 11039 transitions. [2022-11-19 08:15:12,823 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:15:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 11039 transitions. [2022-11-19 08:15:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:15:12,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:12,836 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:15:12,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:13,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:13,042 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash 50856514, now seen corresponding path program 1 times [2022-11-19 08:15:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:13,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82297558] [2022-11-19 08:15:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:13,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 08:15:13,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82297558] [2022-11-19 08:15:13,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82297558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511014207] [2022-11-19 08:15:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:13,149 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:13,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:15:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:15:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:15:13,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:13,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511014207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:13,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:13,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:15:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253657449] [2022-11-19 08:15:13,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:13,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:13,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:13,345 INFO L87 Difference]: Start difference. First operand 7809 states and 11039 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-19 08:15:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:14,972 INFO L93 Difference]: Finished difference Result 13984 states and 20260 transitions. [2022-11-19 08:15:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 121 [2022-11-19 08:15:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:14,999 INFO L225 Difference]: With dead ends: 13984 [2022-11-19 08:15:14,999 INFO L226 Difference]: Without dead ends: 10352 [2022-11-19 08:15:15,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:15,010 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 83 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:15,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 472 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:15:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10352 states. [2022-11-19 08:15:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10352 to 8981. [2022-11-19 08:15:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8981 states, 7338 states have (on average 1.4313164349959118) internal successors, (10503), 7384 states have internal predecessors, (10503), 957 states have call successors, (957), 667 states have call predecessors, (957), 684 states have return successors, (1401), 931 states have call predecessors, (1401), 954 states have call successors, (1401) [2022-11-19 08:15:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 12861 transitions. [2022-11-19 08:15:16,325 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 12861 transitions. Word has length 121 [2022-11-19 08:15:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:16,325 INFO L495 AbstractCegarLoop]: Abstraction has 8981 states and 12861 transitions. [2022-11-19 08:15:16,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-19 08:15:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 12861 transitions. [2022-11-19 08:15:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:15:16,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:16,339 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, 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] [2022-11-19 08:15:16,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 08:15:16,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:15:16,545 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash -521043255, now seen corresponding path program 1 times [2022-11-19 08:15:16,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679161922] [2022-11-19 08:15:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:16,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 08:15:16,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:16,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679161922] [2022-11-19 08:15:16,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679161922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:16,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782939694] [2022-11-19 08:15:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:16,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:16,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:16,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:15:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:15:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:15:16,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:16,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782939694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:16,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:16,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:15:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629091860] [2022-11-19 08:15:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:16,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:16,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:16,842 INFO L87 Difference]: Start difference. First operand 8981 states and 12861 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-19 08:15:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:18,381 INFO L93 Difference]: Finished difference Result 16132 states and 23682 transitions. [2022-11-19 08:15:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 121 [2022-11-19 08:15:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:18,408 INFO L225 Difference]: With dead ends: 16132 [2022-11-19 08:15:18,408 INFO L226 Difference]: Without dead ends: 11854 [2022-11-19 08:15:18,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:18,417 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 77 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:18,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 478 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:15:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2022-11-19 08:15:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 10679. [2022-11-19 08:15:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10679 states, 8856 states have (on average 1.4607046070460705) internal successors, (12936), 8902 states have internal predecessors, (12936), 1047 states have call successors, (1047), 757 states have call predecessors, (1047), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-11-19 08:15:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10679 states to 10679 states and 15474 transitions. [2022-11-19 08:15:19,809 INFO L78 Accepts]: Start accepts. Automaton has 10679 states and 15474 transitions. Word has length 121 [2022-11-19 08:15:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:19,810 INFO L495 AbstractCegarLoop]: Abstraction has 10679 states and 15474 transitions. [2022-11-19 08:15:19,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-19 08:15:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 10679 states and 15474 transitions. [2022-11-19 08:15:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:15:19,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:19,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:15:19,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:20,022 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash 504977827, now seen corresponding path program 2 times [2022-11-19 08:15:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:20,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605189202] [2022-11-19 08:15:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:15:20,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605189202] [2022-11-19 08:15:20,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605189202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62566505] [2022-11-19 08:15:20,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:20,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:20,230 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:20,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:15:20,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:15:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:15:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:15:20,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:15:20,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62566505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339544386] [2022-11-19 08:15:20,991 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-19 08:15:20,991 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:20,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:20,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:20,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:31,034 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 79 for LOIs [2022-11-19 08:15:31,037 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 144 for LOIs [2022-11-19 08:15:31,070 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-19 08:15:31,603 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-19 08:18:22,416 WARN L233 SmtUtils]: Spent 2.83m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:20:53,785 WARN L233 SmtUtils]: Spent 2.52m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:20:53,821 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 142 for LOIs [2022-11-19 08:20:53,853 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 124 for LOIs [2022-11-19 08:20:53,863 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 136 for LOIs [2022-11-19 08:20:54,199 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 134 for LOIs [2022-11-19 08:20:54,812 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 144 for LOIs [2022-11-19 08:20:54,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:21:52,412 WARN L233 SmtUtils]: Spent 41.65s on a formula simplification. DAG size of input: 1183 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:03,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '333609#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (<= ~t3_pc~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:22:03,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:03,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:22:03,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-19 08:22:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041289456] [2022-11-19 08:22:03,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:22:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:22:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:22:03,613 INFO L87 Difference]: Start difference. First operand 10679 states and 15474 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-19 08:22:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:07,952 INFO L93 Difference]: Finished difference Result 33417 states and 48395 transitions. [2022-11-19 08:22:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 08:22:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 121 [2022-11-19 08:22:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:08,006 INFO L225 Difference]: With dead ends: 33417 [2022-11-19 08:22:08,006 INFO L226 Difference]: Without dead ends: 23474 [2022-11-19 08:22:08,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 322 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=923, Invalid=6733, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 08:22:08,028 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1818 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 1110 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:22:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23474 states. [2022-11-19 08:22:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23474 to 21112. [2022-11-19 08:22:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21112 states, 17432 states have (on average 1.4187127122533272) internal successors, (24731), 17510 states have internal predecessors, (24731), 2144 states have call successors, (2144), 1478 states have call predecessors, (2144), 1534 states have return successors, (3037), 2125 states have call predecessors, (3037), 2141 states have call successors, (3037) [2022-11-19 08:22:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21112 states to 21112 states and 29912 transitions. [2022-11-19 08:22:10,669 INFO L78 Accepts]: Start accepts. Automaton has 21112 states and 29912 transitions. Word has length 121 [2022-11-19 08:22:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 21112 states and 29912 transitions. [2022-11-19 08:22:10,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-19 08:22:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21112 states and 29912 transitions. [2022-11-19 08:22:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:22:10,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:10,684 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:10,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-19 08:22:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:10,890 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash 907074545, now seen corresponding path program 1 times [2022-11-19 08:22:10,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:10,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944119262] [2022-11-19 08:22:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:10,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:22:11,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944119262] [2022-11-19 08:22:11,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944119262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629055601] [2022-11-19 08:22:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:11,091 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:11,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:22:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:22:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:22:11,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:22:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629055601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:11,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:22:11,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 08:22:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672162937] [2022-11-19 08:22:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:22:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:22:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:22:11,286 INFO L87 Difference]: Start difference. First operand 21112 states and 29912 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:22:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:14,039 INFO L93 Difference]: Finished difference Result 30944 states and 43599 transitions. [2022-11-19 08:22:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:22:14,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-11-19 08:22:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:14,084 INFO L225 Difference]: With dead ends: 30944 [2022-11-19 08:22:14,084 INFO L226 Difference]: Without dead ends: 21747 [2022-11-19 08:22:14,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:22:14,104 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 222 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:14,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 669 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:22:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21747 states. [2022-11-19 08:22:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21747 to 21389. [2022-11-19 08:22:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 17664 states have (on average 1.4160439311594204) internal successors, (25013), 17758 states have internal predecessors, (25013), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1571 states have return successors, (3093), 2149 states have call predecessors, (3093), 2149 states have call successors, (3093) [2022-11-19 08:22:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 30258 transitions. [2022-11-19 08:22:16,854 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 30258 transitions. Word has length 126 [2022-11-19 08:22:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:16,854 INFO L495 AbstractCegarLoop]: Abstraction has 21389 states and 30258 transitions. [2022-11-19 08:22:16,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:22:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 30258 transitions. [2022-11-19 08:22:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:22:16,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:16,875 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-19 08:22:16,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:17,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:17,081 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 956732298, now seen corresponding path program 1 times [2022-11-19 08:22:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807890416] [2022-11-19 08:22:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:17,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:22:17,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807890416] [2022-11-19 08:22:17,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807890416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991973722] [2022-11-19 08:22:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:17,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:17,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:22:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:17,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:22:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:22:17,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:22:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991973722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:17,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:22:17,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:22:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10646933] [2022-11-19 08:22:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:22:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:22:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:22:17,480 INFO L87 Difference]: Start difference. First operand 21389 states and 30258 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:22:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:20,093 INFO L93 Difference]: Finished difference Result 30654 states and 43380 transitions. [2022-11-19 08:22:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:22:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-19 08:22:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:20,133 INFO L225 Difference]: With dead ends: 30654 [2022-11-19 08:22:20,133 INFO L226 Difference]: Without dead ends: 21101 [2022-11-19 08:22:20,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:22:20,149 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 28 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:20,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 407 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:22:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21101 states. [2022-11-19 08:22:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21101 to 21101. [2022-11-19 08:22:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21101 states, 17408 states have (on average 1.4171070772058822) internal successors, (24669), 17494 states have internal predecessors, (24669), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1539 states have return successors, (3045), 2125 states have call predecessors, (3045), 2149 states have call successors, (3045) [2022-11-19 08:22:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21101 states to 21101 states and 29866 transitions. [2022-11-19 08:22:22,838 INFO L78 Accepts]: Start accepts. Automaton has 21101 states and 29866 transitions. Word has length 127 [2022-11-19 08:22:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:22,838 INFO L495 AbstractCegarLoop]: Abstraction has 21101 states and 29866 transitions. [2022-11-19 08:22:22,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:22:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21101 states and 29866 transitions. [2022-11-19 08:22:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:22:22,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:22,854 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-19 08:22:22,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:23,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:23,055 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1208385225, now seen corresponding path program 1 times [2022-11-19 08:22:23,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566001312] [2022-11-19 08:22:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:23,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:22:23,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566001312] [2022-11-19 08:22:23,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566001312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254422197] [2022-11-19 08:22:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:23,253 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:23,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:22:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:22:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:22:23,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:22:23,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254422197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:23,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:22:23,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 08:22:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058550728] [2022-11-19 08:22:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:23,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:22:23,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:22:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:22:23,511 INFO L87 Difference]: Start difference. First operand 21101 states and 29866 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:22:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:28,200 INFO L93 Difference]: Finished difference Result 49289 states and 69945 transitions. [2022-11-19 08:22:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:22:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-19 08:22:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:28,261 INFO L225 Difference]: With dead ends: 49289 [2022-11-19 08:22:28,262 INFO L226 Difference]: Without dead ends: 28969 [2022-11-19 08:22:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:22:28,295 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 463 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 474 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:22:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28969 states. [2022-11-19 08:22:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28969 to 28965. [2022-11-19 08:22:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28965 states, 23789 states have (on average 1.3969061330867207) internal successors, (33231), 23911 states have internal predecessors, (33231), 3028 states have call successors, (3028), 2071 states have call predecessors, (3028), 2146 states have return successors, (4307), 2984 states have call predecessors, (4307), 3025 states have call successors, (4307) [2022-11-19 08:22:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28965 states to 28965 states and 40566 transitions. [2022-11-19 08:22:32,078 INFO L78 Accepts]: Start accepts. Automaton has 28965 states and 40566 transitions. Word has length 127 [2022-11-19 08:22:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:32,078 INFO L495 AbstractCegarLoop]: Abstraction has 28965 states and 40566 transitions. [2022-11-19 08:22:32,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:22:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28965 states and 40566 transitions. [2022-11-19 08:22:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 08:22:32,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:32,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:32,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:32,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 08:22:32,297 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash 169455045, now seen corresponding path program 1 times [2022-11-19 08:22:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:32,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215108449] [2022-11-19 08:22:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:32,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:22:32,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215108449] [2022-11-19 08:22:32,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215108449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119916702] [2022-11-19 08:22:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:32,490 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:32,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:22:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:22:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:22:32,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:22:32,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119916702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:32,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:22:32,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:22:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621467430] [2022-11-19 08:22:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:22:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:22:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:22:32,713 INFO L87 Difference]: Start difference. First operand 28965 states and 40566 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:22:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:39,264 INFO L93 Difference]: Finished difference Result 68148 states and 95531 transitions. [2022-11-19 08:22:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:22:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-19 08:22:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:39,375 INFO L225 Difference]: With dead ends: 68148 [2022-11-19 08:22:39,375 INFO L226 Difference]: Without dead ends: 39964 [2022-11-19 08:22:39,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:22:39,421 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 458 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:39,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 477 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:22:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39964 states. [2022-11-19 08:22:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39964 to 39960. [2022-11-19 08:22:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39960 states, 32653 states have (on average 1.3757388295103052) internal successors, (44922), 32829 states have internal predecessors, (44922), 4287 states have call successors, (4287), 2915 states have call predecessors, (4287), 3018 states have return successors, (6117), 4217 states have call predecessors, (6117), 4284 states have call successors, (6117) [2022-11-19 08:22:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39960 states to 39960 states and 55326 transitions. [2022-11-19 08:22:45,835 INFO L78 Accepts]: Start accepts. Automaton has 39960 states and 55326 transitions. Word has length 129 [2022-11-19 08:22:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:45,835 INFO L495 AbstractCegarLoop]: Abstraction has 39960 states and 55326 transitions. [2022-11-19 08:22:45,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:22:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 39960 states and 55326 transitions. [2022-11-19 08:22:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 08:22:45,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:45,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:46,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 08:22:46,200 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1175040583, now seen corresponding path program 1 times [2022-11-19 08:22:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153918649] [2022-11-19 08:22:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:22:46,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153918649] [2022-11-19 08:22:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153918649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874532290] [2022-11-19 08:22:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:46,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:46,376 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:46,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cec4ce9-af1b-4ab7-89b5-4377484d7bb5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:22:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:22:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:22:46,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:22:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874532290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:46,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:22:46,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:22:46,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251230600] [2022-11-19 08:22:46,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:46,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:22:46,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:46,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:22:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:22:46,623 INFO L87 Difference]: Start difference. First operand 39960 states and 55326 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)