./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:56,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:56,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:56,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:56,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:56,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:56,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:56,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:56,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:56,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:56,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:56,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:56,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:56,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:56,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:56,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:56,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:56,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:56,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:56,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:56,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:56,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:56,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:56,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:56,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:56,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:56,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:56,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:56,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:56,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:56,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:56,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:56,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:56,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:56,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:56,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:56,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:56,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:56,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:56,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:56,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:56,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:56,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:56,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:56,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:56,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:56,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:56,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:56,934 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:56,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:56,934 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:56,934 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:56,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:56,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:56,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:56,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:56,936 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:56,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:56,937 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:56,937 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:56,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:56,938 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:56,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:56,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:56,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:56,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:56,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:56,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:56,941 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:56,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:56,941 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:56,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:56,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:56,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:56,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:56,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:56,943 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:56,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:56,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:56,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:56,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:56,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:56,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:56,944 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_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 [2022-11-03 03:29:57,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:57,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:57,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:57,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:57,366 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:57,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-11-03 03:29:57,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/data/009cdd899/c0f30473f60742a98226e2fa4239022f/FLAGc62c96d09 [2022-11-03 03:29:58,074 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:58,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-11-03 03:29:58,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/data/009cdd899/c0f30473f60742a98226e2fa4239022f/FLAGc62c96d09 [2022-11-03 03:29:58,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/data/009cdd899/c0f30473f60742a98226e2fa4239022f [2022-11-03 03:29:58,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:58,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:58,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:58,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:58,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:58,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:58,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c61922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58, skipping insertion in model container [2022-11-03 03:29:58,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:58,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:58,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:58,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-11-03 03:29:58,707 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-11-03 03:29:58,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:58,807 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:58,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-11-03 03:29:58,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-11-03 03:29:58,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:58,930 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:58,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58 WrapperNode [2022-11-03 03:29:58,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:58,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:58,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:58,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:58,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:58,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,018 INFO L138 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 639 [2022-11-03 03:29:59,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:59,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:59,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:59,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:59,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:59,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:59,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:59,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:59,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (1/1) ... [2022-11-03 03:29:59,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:59,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:59,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:59,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:59,183 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:29:59,184 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:29:59,184 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 03:29:59,184 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 03:29:59,184 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 03:29:59,184 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 03:29:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 03:29:59,185 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 03:29:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 03:29:59,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 03:29:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 03:29:59,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 03:29:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 03:29:59,186 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 03:29:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 03:29:59,187 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 03:29:59,187 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 03:29:59,187 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 03:29:59,187 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 03:29:59,187 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 03:29:59,188 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 03:29:59,188 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 03:29:59,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:59,188 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 03:29:59,189 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 03:29:59,189 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 03:29:59,189 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 03:29:59,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:59,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:59,189 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 03:29:59,190 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 03:29:59,190 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 03:29:59,190 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 03:29:59,337 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:59,340 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:30:00,343 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:30:00,703 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:30:00,703 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 03:30:00,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:00 BoogieIcfgContainer [2022-11-03 03:30:00,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:30:00,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:30:00,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:30:00,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:30:00,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:58" (1/3) ... [2022-11-03 03:30:00,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca341eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:00, skipping insertion in model container [2022-11-03 03:30:00,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:58" (2/3) ... [2022-11-03 03:30:00,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca341eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:00, skipping insertion in model container [2022-11-03 03:30:00,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:00" (3/3) ... [2022-11-03 03:30:00,718 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-11-03 03:30:00,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:30:00,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 03:30:00,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:30:00,811 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;@13c1d865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:30:00,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 03:30:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 144 states have internal predecessors, (207), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-03 03:30:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:30:00,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:00,829 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] [2022-11-03 03:30:00,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1297203234, now seen corresponding path program 1 times [2022-11-03 03:30:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911858665] [2022-11-03 03:30:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:01,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:01,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911858665] [2022-11-03 03:30:01,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911858665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:01,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:01,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:30:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314161998] [2022-11-03 03:30:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:01,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:01,698 INFO L87 Difference]: Start difference. First operand has 189 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 144 states have internal predecessors, (207), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) 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) [2022-11-03 03:30:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:02,746 INFO L93 Difference]: Finished difference Result 434 states and 622 transitions. [2022-11-03 03:30:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:30:02,750 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 [2022-11-03 03:30:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:02,774 INFO L225 Difference]: With dead ends: 434 [2022-11-03 03:30:02,777 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 03:30:02,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:30:02,792 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 408 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:02,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 850 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 03:30:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 235. [2022-11-03 03:30:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 170 states have (on average 1.423529411764706) internal successors, (242), 175 states have internal predecessors, (242), 43 states have call successors, (43), 22 states have call predecessors, (43), 20 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 03:30:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 324 transitions. [2022-11-03 03:30:02,895 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 324 transitions. Word has length 45 [2022-11-03 03:30:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:02,896 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 324 transitions. [2022-11-03 03:30:02,897 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) [2022-11-03 03:30:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 324 transitions. [2022-11-03 03:30:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:30:02,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:02,900 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] [2022-11-03 03:30:02,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:30:02,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1577705397, now seen corresponding path program 1 times [2022-11-03 03:30:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803136103] [2022-11-03 03:30:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:02,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:02,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803136103] [2022-11-03 03:30:02,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803136103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:02,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:02,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848241802] [2022-11-03 03:30:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:02,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:02,964 INFO L87 Difference]: Start difference. First operand 235 states and 324 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) [2022-11-03 03:30:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:03,091 INFO L93 Difference]: Finished difference Result 460 states and 611 transitions. [2022-11-03 03:30:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:03,091 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 [2022-11-03 03:30:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:03,094 INFO L225 Difference]: With dead ends: 460 [2022-11-03 03:30:03,094 INFO L226 Difference]: Without dead ends: 344 [2022-11-03 03:30:03,095 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 [2022-11-03 03:30:03,097 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 235 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:03,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 287 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-03 03:30:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2022-11-03 03:30:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 235 states have (on average 1.3702127659574468) internal successors, (322), 240 states have internal predecessors, (322), 59 states have call successors, (59), 36 states have call predecessors, (59), 34 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-03 03:30:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 436 transitions. [2022-11-03 03:30:03,181 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 436 transitions. Word has length 46 [2022-11-03 03:30:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:03,182 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 436 transitions. [2022-11-03 03:30:03,183 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) [2022-11-03 03:30:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 436 transitions. [2022-11-03 03:30:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:30:03,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:03,191 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] [2022-11-03 03:30:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:30:03,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -776035917, now seen corresponding path program 1 times [2022-11-03 03:30:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335335984] [2022-11-03 03:30:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:03,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335335984] [2022-11-03 03:30:03,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335335984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:03,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:03,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810774262] [2022-11-03 03:30:03,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:03,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:03,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:03,281 INFO L87 Difference]: Start difference. First operand 330 states and 436 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) [2022-11-03 03:30:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:03,443 INFO L93 Difference]: Finished difference Result 694 states and 884 transitions. [2022-11-03 03:30:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:03,444 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 [2022-11-03 03:30:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:03,448 INFO L225 Difference]: With dead ends: 694 [2022-11-03 03:30:03,449 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 03:30:03,455 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 [2022-11-03 03:30:03,460 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 68 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:03,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 422 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 03:30:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 480. [2022-11-03 03:30:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 340 states have (on average 1.3441176470588236) internal successors, (457), 345 states have internal predecessors, (457), 83 states have call successors, (83), 57 states have call predecessors, (83), 55 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-03 03:30:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 619 transitions. [2022-11-03 03:30:03,510 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 619 transitions. Word has length 47 [2022-11-03 03:30:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:03,511 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 619 transitions. [2022-11-03 03:30:03,511 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) [2022-11-03 03:30:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 619 transitions. [2022-11-03 03:30:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:30:03,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:03,514 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] [2022-11-03 03:30:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:30:03,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1315996642, now seen corresponding path program 1 times [2022-11-03 03:30:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:03,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56623021] [2022-11-03 03:30:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:03,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:03,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56623021] [2022-11-03 03:30:03,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56623021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:03,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:03,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089611463] [2022-11-03 03:30:03,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:03,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:03,641 INFO L87 Difference]: Start difference. First operand 480 states and 619 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:30:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:04,449 INFO L93 Difference]: Finished difference Result 983 states and 1415 transitions. [2022-11-03 03:30:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-11-03 03:30:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:04,456 INFO L225 Difference]: With dead ends: 983 [2022-11-03 03:30:04,457 INFO L226 Difference]: Without dead ends: 874 [2022-11-03 03:30:04,458 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 [2022-11-03 03:30:04,459 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 807 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:04,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 864 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-03 03:30:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 861. [2022-11-03 03:30:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 640 states have (on average 1.4015625) internal successors, (897), 648 states have internal predecessors, (897), 140 states have call successors, (140), 81 states have call predecessors, (140), 79 states have return successors, (170), 133 states have call predecessors, (170), 136 states have call successors, (170) [2022-11-03 03:30:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1207 transitions. [2022-11-03 03:30:04,565 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1207 transitions. Word has length 47 [2022-11-03 03:30:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:04,566 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1207 transitions. [2022-11-03 03:30:04,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:30:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1207 transitions. [2022-11-03 03:30:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:30:04,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:04,568 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] [2022-11-03 03:30:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:30:04,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 615328978, now seen corresponding path program 1 times [2022-11-03 03:30:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345475317] [2022-11-03 03:30:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:04,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345475317] [2022-11-03 03:30:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345475317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:04,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:04,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297502965] [2022-11-03 03:30:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:04,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:04,618 INFO L87 Difference]: Start difference. First operand 861 states and 1207 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) [2022-11-03 03:30:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:04,807 INFO L93 Difference]: Finished difference Result 1285 states and 1729 transitions. [2022-11-03 03:30:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:04,808 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 [2022-11-03 03:30:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:04,815 INFO L225 Difference]: With dead ends: 1285 [2022-11-03 03:30:04,815 INFO L226 Difference]: Without dead ends: 924 [2022-11-03 03:30:04,817 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 [2022-11-03 03:30:04,820 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 235 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:04,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 294 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-03 03:30:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 912. [2022-11-03 03:30:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 676 states have (on average 1.3890532544378698) internal successors, (939), 684 states have internal predecessors, (939), 148 states have call successors, (148), 88 states have call predecessors, (148), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-11-03 03:30:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1265 transitions. [2022-11-03 03:30:04,929 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1265 transitions. Word has length 53 [2022-11-03 03:30:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:04,932 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1265 transitions. [2022-11-03 03:30:04,932 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) [2022-11-03 03:30:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1265 transitions. [2022-11-03 03:30:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:30:04,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:04,935 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] [2022-11-03 03:30:04,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:30:04,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1378885210, now seen corresponding path program 1 times [2022-11-03 03:30:04,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185502200] [2022-11-03 03:30:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:04,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:05,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185502200] [2022-11-03 03:30:05,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185502200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:05,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:05,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:05,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280953665] [2022-11-03 03:30:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:05,071 INFO L87 Difference]: Start difference. First operand 912 states and 1265 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) [2022-11-03 03:30:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:05,397 INFO L93 Difference]: Finished difference Result 1021 states and 1397 transitions. [2022-11-03 03:30:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:05,398 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 [2022-11-03 03:30:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:05,403 INFO L225 Difference]: With dead ends: 1021 [2022-11-03 03:30:05,403 INFO L226 Difference]: Without dead ends: 1018 [2022-11-03 03:30:05,404 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 [2022-11-03 03:30:05,405 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 424 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:05,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 273 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-03 03:30:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 911. [2022-11-03 03:30:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 676 states have (on average 1.3846153846153846) internal successors, (936), 683 states have internal predecessors, (936), 147 states have call successors, (147), 88 states have call predecessors, (147), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-11-03 03:30:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1261 transitions. [2022-11-03 03:30:05,500 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1261 transitions. Word has length 54 [2022-11-03 03:30:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:05,500 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1261 transitions. [2022-11-03 03:30:05,501 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) [2022-11-03 03:30:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1261 transitions. [2022-11-03 03:30:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:30:05,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:05,502 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] [2022-11-03 03:30:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:30:05,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -205179364, now seen corresponding path program 1 times [2022-11-03 03:30:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794102123] [2022-11-03 03:30:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:05,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794102123] [2022-11-03 03:30:05,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794102123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378069177] [2022-11-03 03:30:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:05,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:30:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:30:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:06,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378069177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429305023] [2022-11-03 03:30:06,378 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:30:06,378 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:06,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:06,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:06,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:12,131 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 135 for LOIs [2022-11-03 03:30:12,190 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 103 for LOIs [2022-11-03 03:30:12,211 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 131 for LOIs [2022-11-03 03:30:12,236 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 139 for LOIs [2022-11-03 03:30:12,735 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 135 for LOIs [2022-11-03 03:30:12,787 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 135 for LOIs [2022-11-03 03:30:12,838 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 135 for LOIs [2022-11-03 03:30:12,862 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 142 for LOIs [2022-11-03 03:30:12,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:34,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13176#(and (= ~q_req_up~0 1) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~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) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~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) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:34,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:34,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:34,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 03:30:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983671586] [2022-11-03 03:30:34,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:30:34,375 INFO L87 Difference]: Start difference. First operand 911 states and 1261 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 03:30:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:35,112 INFO L93 Difference]: Finished difference Result 1700 states and 2229 transitions. [2022-11-03 03:30:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-03 03:30:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:35,122 INFO L225 Difference]: With dead ends: 1700 [2022-11-03 03:30:35,122 INFO L226 Difference]: Without dead ends: 1697 [2022-11-03 03:30:35,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:30:35,125 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 660 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:35,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1022 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:30:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-11-03 03:30:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1317. [2022-11-03 03:30:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 962 states have (on average 1.3555093555093556) internal successors, (1304), 969 states have internal predecessors, (1304), 211 states have call successors, (211), 144 states have call predecessors, (211), 142 states have return successors, (242), 205 states have call predecessors, (242), 208 states have call successors, (242) [2022-11-03 03:30:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1757 transitions. [2022-11-03 03:30:35,253 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1757 transitions. Word has length 55 [2022-11-03 03:30:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:35,255 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 1757 transitions. [2022-11-03 03:30:35,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 03:30:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1757 transitions. [2022-11-03 03:30:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:30:35,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:35,257 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:30:35,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 03:30:35,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1899546278, now seen corresponding path program 2 times [2022-11-03 03:30:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74579892] [2022-11-03 03:30:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:35,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74579892] [2022-11-03 03:30:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74579892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:35,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:35,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814229197] [2022-11-03 03:30:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:35,518 INFO L87 Difference]: Start difference. First operand 1317 states and 1757 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-03 03:30:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:35,720 INFO L93 Difference]: Finished difference Result 1738 states and 2274 transitions. [2022-11-03 03:30:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:35,721 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), 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 58 [2022-11-03 03:30:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:35,727 INFO L225 Difference]: With dead ends: 1738 [2022-11-03 03:30:35,727 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:30:35,729 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 [2022-11-03 03:30:35,730 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 235 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:35,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 330 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:30:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1115. [2022-11-03 03:30:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 820 states have (on average 1.3560975609756099) internal successors, (1112), 827 states have internal predecessors, (1112), 179 states have call successors, (179), 116 states have call predecessors, (179), 114 states have return successors, (210), 173 states have call predecessors, (210), 176 states have call successors, (210) [2022-11-03 03:30:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1501 transitions. [2022-11-03 03:30:35,864 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1501 transitions. Word has length 58 [2022-11-03 03:30:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:35,864 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1501 transitions. [2022-11-03 03:30:35,864 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), 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) [2022-11-03 03:30:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1501 transitions. [2022-11-03 03:30:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:30:35,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:35,867 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] [2022-11-03 03:30:35,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:30:35,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1130782289, now seen corresponding path program 1 times [2022-11-03 03:30:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098271118] [2022-11-03 03:30:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:35,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:35,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:35,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098271118] [2022-11-03 03:30:35,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098271118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:35,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:35,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:35,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032766110] [2022-11-03 03:30:35,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:35,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:35,927 INFO L87 Difference]: Start difference. First operand 1115 states and 1501 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) [2022-11-03 03:30:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:36,135 INFO L93 Difference]: Finished difference Result 1750 states and 2279 transitions. [2022-11-03 03:30:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:36,136 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 [2022-11-03 03:30:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:36,144 INFO L225 Difference]: With dead ends: 1750 [2022-11-03 03:30:36,144 INFO L226 Difference]: Without dead ends: 1373 [2022-11-03 03:30:36,146 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 [2022-11-03 03:30:36,149 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 44 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 466 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 [2022-11-03 03:30:36,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 466 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-11-03 03:30:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1192. [2022-11-03 03:30:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 883 states have (on average 1.3533408833522085) internal successors, (1195), 890 states have internal predecessors, (1195), 186 states have call successors, (186), 123 states have call predecessors, (186), 121 states have return successors, (217), 180 states have call predecessors, (217), 183 states have call successors, (217) [2022-11-03 03:30:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1598 transitions. [2022-11-03 03:30:36,308 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1598 transitions. Word has length 61 [2022-11-03 03:30:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1598 transitions. [2022-11-03 03:30:36,310 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) [2022-11-03 03:30:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1598 transitions. [2022-11-03 03:30:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 03:30:36,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:36,312 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:30:36,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:30:36,312 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1103473190, now seen corresponding path program 1 times [2022-11-03 03:30:36,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:36,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880521730] [2022-11-03 03:30:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:36,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:36,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880521730] [2022-11-03 03:30:36,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880521730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:36,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:36,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:30:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703726638] [2022-11-03 03:30:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:36,512 INFO L87 Difference]: Start difference. First operand 1192 states and 1598 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-11-03 03:30:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:37,274 INFO L93 Difference]: Finished difference Result 2253 states and 2859 transitions. [2022-11-03 03:30:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:30:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 70 [2022-11-03 03:30:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:37,282 INFO L225 Difference]: With dead ends: 2253 [2022-11-03 03:30:37,283 INFO L226 Difference]: Without dead ends: 1562 [2022-11-03 03:30:37,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:30:37,286 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 369 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:37,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 717 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:30:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-11-03 03:30:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1513. [2022-11-03 03:30:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1099 states have (on average 1.3212010919017287) internal successors, (1452), 1106 states have internal predecessors, (1452), 242 states have call successors, (242), 172 states have call predecessors, (242), 170 states have return successors, (273), 236 states have call predecessors, (273), 239 states have call successors, (273) [2022-11-03 03:30:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1967 transitions. [2022-11-03 03:30:37,487 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1967 transitions. Word has length 70 [2022-11-03 03:30:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:37,488 INFO L495 AbstractCegarLoop]: Abstraction has 1513 states and 1967 transitions. [2022-11-03 03:30:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-11-03 03:30:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1967 transitions. [2022-11-03 03:30:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 03:30:37,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:37,495 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] [2022-11-03 03:30:37,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:30:37,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2008090784, now seen corresponding path program 1 times [2022-11-03 03:30:37,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:37,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247004526] [2022-11-03 03:30:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:37,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:37,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247004526] [2022-11-03 03:30:37,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247004526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:37,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:37,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:37,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577718935] [2022-11-03 03:30:37,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:37,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:37,574 INFO L87 Difference]: Start difference. First operand 1513 states and 1967 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) [2022-11-03 03:30:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:37,841 INFO L93 Difference]: Finished difference Result 2544 states and 3200 transitions. [2022-11-03 03:30:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:37,841 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 [2022-11-03 03:30:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:37,849 INFO L225 Difference]: With dead ends: 2544 [2022-11-03 03:30:37,850 INFO L226 Difference]: Without dead ends: 1687 [2022-11-03 03:30:37,852 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 [2022-11-03 03:30:37,853 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 39 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 460 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 [2022-11-03 03:30:37,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 460 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-11-03 03:30:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1558. [2022-11-03 03:30:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1136 states have (on average 1.3169014084507042) internal successors, (1496), 1143 states have internal predecessors, (1496), 246 states have call successors, (246), 176 states have call predecessors, (246), 174 states have return successors, (277), 240 states have call predecessors, (277), 243 states have call successors, (277) [2022-11-03 03:30:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2019 transitions. [2022-11-03 03:30:38,063 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2019 transitions. Word has length 71 [2022-11-03 03:30:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:38,063 INFO L495 AbstractCegarLoop]: Abstraction has 1558 states and 2019 transitions. [2022-11-03 03:30:38,063 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) [2022-11-03 03:30:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2019 transitions. [2022-11-03 03:30:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:30:38,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:38,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:38,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:30:38,067 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash 243451109, now seen corresponding path program 1 times [2022-11-03 03:30:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470164444] [2022-11-03 03:30:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:30:38,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470164444] [2022-11-03 03:30:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470164444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492108244] [2022-11-03 03:30:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:38,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:38,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:38,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:38,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:30:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:38,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:30:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:30:38,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:38,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492108244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:38,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:38,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:30:38,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827519724] [2022-11-03 03:30:38,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:38,409 INFO L87 Difference]: Start difference. First operand 1558 states and 2019 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-03 03:30:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:38,707 INFO L93 Difference]: Finished difference Result 2522 states and 3552 transitions. [2022-11-03 03:30:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-03 03:30:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:38,718 INFO L225 Difference]: With dead ends: 2522 [2022-11-03 03:30:38,719 INFO L226 Difference]: Without dead ends: 2032 [2022-11-03 03:30:38,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:38,723 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 226 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:38,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 357 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2022-11-03 03:30:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2023. [2022-11-03 03:30:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1504 states have (on average 1.3503989361702127) internal successors, (2031), 1514 states have internal predecessors, (2031), 313 states have call successors, (313), 206 states have call predecessors, (313), 204 states have return successors, (374), 304 states have call predecessors, (374), 310 states have call successors, (374) [2022-11-03 03:30:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2718 transitions. [2022-11-03 03:30:38,949 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2718 transitions. Word has length 88 [2022-11-03 03:30:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:38,950 INFO L495 AbstractCegarLoop]: Abstraction has 2023 states and 2718 transitions. [2022-11-03 03:30:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-03 03:30:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2718 transitions. [2022-11-03 03:30:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:30:38,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:38,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:39,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:30:39,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash -350580761, now seen corresponding path program 1 times [2022-11-03 03:30:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:39,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185736548] [2022-11-03 03:30:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:30:39,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185736548] [2022-11-03 03:30:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185736548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904171196] [2022-11-03 03:30:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:39,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:39,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:39,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:39,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:30:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:30:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:39,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:39,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904171196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:39,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:39,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:30:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326524121] [2022-11-03 03:30:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:39,548 INFO L87 Difference]: Start difference. First operand 2023 states and 2718 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:30:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:39,962 INFO L93 Difference]: Finished difference Result 3902 states and 5678 transitions. [2022-11-03 03:30:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-03 03:30:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:39,979 INFO L225 Difference]: With dead ends: 3902 [2022-11-03 03:30:39,979 INFO L226 Difference]: Without dead ends: 2947 [2022-11-03 03:30:39,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:39,986 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 229 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:39,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 354 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2022-11-03 03:30:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2933. [2022-11-03 03:30:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2225 states have (on average 1.3802247191011237) internal successors, (3071), 2241 states have internal predecessors, (3071), 442 states have call successors, (442), 266 states have call predecessors, (442), 264 states have return successors, (559), 427 states have call predecessors, (559), 439 states have call successors, (559) [2022-11-03 03:30:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4072 transitions. [2022-11-03 03:30:40,357 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4072 transitions. Word has length 88 [2022-11-03 03:30:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:40,358 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 4072 transitions. [2022-11-03 03:30:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:30:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4072 transitions. [2022-11-03 03:30:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:30:40,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:40,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:40,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:40,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:30:40,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1888760411, now seen corresponding path program 1 times [2022-11-03 03:30:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29217967] [2022-11-03 03:30:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:30:40,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29217967] [2022-11-03 03:30:40,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29217967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:40,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:40,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:40,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785811433] [2022-11-03 03:30:40,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:40,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:40,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:40,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:40,672 INFO L87 Difference]: Start difference. First operand 2933 states and 4072 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:41,088 INFO L93 Difference]: Finished difference Result 4857 states and 7091 transitions. [2022-11-03 03:30:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:41,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-11-03 03:30:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:41,107 INFO L225 Difference]: With dead ends: 4857 [2022-11-03 03:30:41,108 INFO L226 Difference]: Without dead ends: 3357 [2022-11-03 03:30:41,114 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 [2022-11-03 03:30:41,114 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 65 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:41,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 499 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-11-03 03:30:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3177. [2022-11-03 03:30:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 2453 states have (on average 1.4101100693028945) internal successors, (3459), 2469 states have internal predecessors, (3459), 450 states have call successors, (450), 274 states have call predecessors, (450), 272 states have return successors, (567), 435 states have call predecessors, (567), 447 states have call successors, (567) [2022-11-03 03:30:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4476 transitions. [2022-11-03 03:30:41,493 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4476 transitions. Word has length 88 [2022-11-03 03:30:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:41,493 INFO L495 AbstractCegarLoop]: Abstraction has 3177 states and 4476 transitions. [2022-11-03 03:30:41,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4476 transitions. [2022-11-03 03:30:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:30:41,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:41,500 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] [2022-11-03 03:30:41,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:30:41,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1027908704, now seen corresponding path program 1 times [2022-11-03 03:30:41,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:41,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084637019] [2022-11-03 03:30:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:30:41,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084637019] [2022-11-03 03:30:41,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084637019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578171853] [2022-11-03 03:30:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:41,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:41,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:41,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:30:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:30:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:42,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578171853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:42,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:42,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-03 03:30:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93471764] [2022-11-03 03:30:42,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:30:42,165 INFO L87 Difference]: Start difference. First operand 3177 states and 4476 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) [2022-11-03 03:30:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:42,540 INFO L93 Difference]: Finished difference Result 4006 states and 5494 transitions. [2022-11-03 03:30:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:42,541 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 [2022-11-03 03:30:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:42,555 INFO L225 Difference]: With dead ends: 4006 [2022-11-03 03:30:42,555 INFO L226 Difference]: Without dead ends: 3206 [2022-11-03 03:30:42,559 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 [2022-11-03 03:30:42,559 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 47 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:42,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 466 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2022-11-03 03:30:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3173. [2022-11-03 03:30:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2449 states have (on average 1.3977133523887302) internal successors, (3423), 2465 states have internal predecessors, (3423), 450 states have call successors, (450), 274 states have call predecessors, (450), 272 states have return successors, (567), 435 states have call predecessors, (567), 447 states have call successors, (567) [2022-11-03 03:30:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4440 transitions. [2022-11-03 03:30:43,092 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4440 transitions. Word has length 102 [2022-11-03 03:30:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:43,093 INFO L495 AbstractCegarLoop]: Abstraction has 3173 states and 4440 transitions. [2022-11-03 03:30:43,094 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) [2022-11-03 03:30:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4440 transitions. [2022-11-03 03:30:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:30:43,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:43,102 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] [2022-11-03 03:30:43,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:43,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash 548649055, now seen corresponding path program 1 times [2022-11-03 03:30:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233343080] [2022-11-03 03:30:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:30:43,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233343080] [2022-11-03 03:30:43,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233343080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323800550] [2022-11-03 03:30:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:43,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:30:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:30:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:43,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:43,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323800550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:43,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:43,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 03:30:43,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184697368] [2022-11-03 03:30:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:43,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:43,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:43,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:30:43,984 INFO L87 Difference]: Start difference. First operand 3173 states and 4440 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) [2022-11-03 03:30:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:44,534 INFO L93 Difference]: Finished difference Result 4059 states and 5511 transitions. [2022-11-03 03:30:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:30:44,535 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 [2022-11-03 03:30:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:44,549 INFO L225 Difference]: With dead ends: 4059 [2022-11-03 03:30:44,549 INFO L226 Difference]: Without dead ends: 3006 [2022-11-03 03:30:44,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:30:44,554 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 226 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:44,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 972 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2022-11-03 03:30:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2809. [2022-11-03 03:30:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2216 states have (on average 1.421028880866426) internal successors, (3149), 2232 states have internal predecessors, (3149), 379 states have call successors, (379), 214 states have call predecessors, (379), 212 states have return successors, (496), 364 states have call predecessors, (496), 376 states have call successors, (496) [2022-11-03 03:30:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4024 transitions. [2022-11-03 03:30:44,842 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4024 transitions. Word has length 102 [2022-11-03 03:30:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:44,842 INFO L495 AbstractCegarLoop]: Abstraction has 2809 states and 4024 transitions. [2022-11-03 03:30:44,843 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) [2022-11-03 03:30:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4024 transitions. [2022-11-03 03:30:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:30:44,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:44,849 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] [2022-11-03 03:30:44,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:45,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:30:45,064 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -320909715, now seen corresponding path program 1 times [2022-11-03 03:30:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619380524] [2022-11-03 03:30:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:30:45,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619380524] [2022-11-03 03:30:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619380524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:45,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:45,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690648468] [2022-11-03 03:30:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:45,166 INFO L87 Difference]: Start difference. First operand 2809 states and 4024 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) [2022-11-03 03:30:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:45,615 INFO L93 Difference]: Finished difference Result 3428 states and 4766 transitions. [2022-11-03 03:30:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:45,616 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 [2022-11-03 03:30:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:45,630 INFO L225 Difference]: With dead ends: 3428 [2022-11-03 03:30:45,630 INFO L226 Difference]: Without dead ends: 2808 [2022-11-03 03:30:45,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:45,634 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 287 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:45,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 423 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2022-11-03 03:30:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2799. [2022-11-03 03:30:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2206 states have (on average 1.4111514052583862) internal successors, (3113), 2222 states have internal predecessors, (3113), 379 states have call successors, (379), 214 states have call predecessors, (379), 212 states have return successors, (496), 364 states have call predecessors, (496), 376 states have call successors, (496) [2022-11-03 03:30:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 3988 transitions. [2022-11-03 03:30:45,932 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 3988 transitions. Word has length 112 [2022-11-03 03:30:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:45,932 INFO L495 AbstractCegarLoop]: Abstraction has 2799 states and 3988 transitions. [2022-11-03 03:30:45,933 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) [2022-11-03 03:30:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 3988 transitions. [2022-11-03 03:30:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:30:45,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:45,940 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] [2022-11-03 03:30:45,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 03:30:45,940 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1572532460, now seen corresponding path program 1 times [2022-11-03 03:30:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654490664] [2022-11-03 03:30:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:45,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:30:46,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654490664] [2022-11-03 03:30:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654490664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727427887] [2022-11-03 03:30:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:46,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:46,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:30:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:30:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:46,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:46,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727427887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:46,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:46,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 03:30:46,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819299715] [2022-11-03 03:30:46,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:46,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:46,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:46,374 INFO L87 Difference]: Start difference. First operand 2799 states and 3988 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) [2022-11-03 03:30:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:46,890 INFO L93 Difference]: Finished difference Result 3348 states and 4613 transitions. [2022-11-03 03:30:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:46,891 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 [2022-11-03 03:30:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:46,918 INFO L225 Difference]: With dead ends: 3348 [2022-11-03 03:30:46,918 INFO L226 Difference]: Without dead ends: 2755 [2022-11-03 03:30:46,921 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 [2022-11-03 03:30:46,922 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 66 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:46,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1197 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-03 03:30:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2663. [2022-11-03 03:30:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2106 states have (on average 1.4226020892687559) internal successors, (2996), 2122 states have internal predecessors, (2996), 360 states have call successors, (360), 197 states have call predecessors, (360), 195 states have return successors, (477), 345 states have call predecessors, (477), 357 states have call successors, (477) [2022-11-03 03:30:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3833 transitions. [2022-11-03 03:30:47,358 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3833 transitions. Word has length 112 [2022-11-03 03:30:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:47,358 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3833 transitions. [2022-11-03 03:30:47,358 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) [2022-11-03 03:30:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3833 transitions. [2022-11-03 03:30:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:30:47,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:47,371 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] [2022-11-03 03:30:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:30:47,600 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2100028216, now seen corresponding path program 1 times [2022-11-03 03:30:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581610672] [2022-11-03 03:30:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:30:47,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581610672] [2022-11-03 03:30:47,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581610672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202477304] [2022-11-03 03:30:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:47,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:47,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:47,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:30:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:30:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:30:48,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202477304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:48,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:48,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 03:30:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217001700] [2022-11-03 03:30:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:48,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:30:48,041 INFO L87 Difference]: Start difference. First operand 2663 states and 3833 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) [2022-11-03 03:30:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:48,541 INFO L93 Difference]: Finished difference Result 3412 states and 4678 transitions. [2022-11-03 03:30:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:48,542 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 [2022-11-03 03:30:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:48,553 INFO L225 Difference]: With dead ends: 3412 [2022-11-03 03:30:48,554 INFO L226 Difference]: Without dead ends: 2955 [2022-11-03 03:30:48,556 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 [2022-11-03 03:30:48,557 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 211 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:48,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1042 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-11-03 03:30:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2921. [2022-11-03 03:30:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2268 states have (on average 1.400352733686067) internal successors, (3176), 2290 states have internal predecessors, (3176), 408 states have call successors, (408), 239 states have call predecessors, (408), 243 states have return successors, (537), 393 states have call predecessors, (537), 405 states have call successors, (537) [2022-11-03 03:30:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 4121 transitions. [2022-11-03 03:30:48,893 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 4121 transitions. Word has length 113 [2022-11-03 03:30:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:48,894 INFO L495 AbstractCegarLoop]: Abstraction has 2921 states and 4121 transitions. [2022-11-03 03:30:48,894 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) [2022-11-03 03:30:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 4121 transitions. [2022-11-03 03:30:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:30:48,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:48,902 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] [2022-11-03 03:30:48,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:49,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2031216409, now seen corresponding path program 1 times [2022-11-03 03:30:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665118967] [2022-11-03 03:30:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:30:50,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665118967] [2022-11-03 03:30:50,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665118967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376128243] [2022-11-03 03:30:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:50,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:50,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:50,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:30:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 03:30:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:51,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:30:53,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376128243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193629556] [2022-11-03 03:30:53,134 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 03:30:53,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:53,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:53,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:53,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:33,304 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 232 for LOIs [2022-11-03 03:31:33,763 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-03 03:31:33,819 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 174 for LOIs [2022-11-03 03:31:33,865 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2022-11-03 03:31:35,575 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 142 for LOIs [2022-11-03 03:31:35,769 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 88 for LOIs [2022-11-03 03:31:35,980 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 236 for LOIs [2022-11-03 03:31:36,560 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 259 for LOIs [2022-11-03 03:31:36,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:35,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115084#(and (<= 0 |#NULL.base|) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (= 0 ~t5_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_3~0) (<= 0 ~t5_i~0) (<= ~q_req_up~0 1) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0))' at error location [2022-11-03 03:32:35,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:35,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:35,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-03 03:32:35,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509123196] [2022-11-03 03:32:35,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:35,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 03:32:35,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:35,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 03:32:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=10562, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 03:32:35,519 INFO L87 Difference]: Start difference. First operand 2921 states and 4121 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) [2022-11-03 03:32:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:58,980 INFO L93 Difference]: Finished difference Result 5432 states and 7037 transitions. [2022-11-03 03:32:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-03 03:32:58,984 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 [2022-11-03 03:32:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:58,998 INFO L225 Difference]: With dead ends: 5432 [2022-11-03 03:32:58,998 INFO L226 Difference]: Without dead ends: 4717 [2022-11-03 03:32:59,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44221 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=10067, Invalid=99163, Unknown=0, NotChecked=0, Total=109230 [2022-11-03 03:32:59,021 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 5059 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 6988 mSolverCounterSat, 3046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5060 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 10034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3046 IncrementalHoareTripleChecker+Valid, 6988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:59,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5060 Valid, 2928 Invalid, 10034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3046 Valid, 6988 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 03:32:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2022-11-03 03:32:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 3197. [2022-11-03 03:32:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2452 states have (on average 1.3813213703099512) internal successors, (3387), 2476 states have internal predecessors, (3387), 453 states have call successors, (453), 276 states have call predecessors, (453), 290 states have return successors, (594), 446 states have call predecessors, (594), 450 states have call successors, (594) [2022-11-03 03:32:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4434 transitions. [2022-11-03 03:32:59,394 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4434 transitions. Word has length 114 [2022-11-03 03:32:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:59,395 INFO L495 AbstractCegarLoop]: Abstraction has 3197 states and 4434 transitions. [2022-11-03 03:32:59,395 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) [2022-11-03 03:32:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4434 transitions. [2022-11-03 03:32:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 03:32:59,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:59,403 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] [2022-11-03 03:32:59,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:59,620 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -319653699, now seen corresponding path program 1 times [2022-11-03 03:32:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147200404] [2022-11-03 03:32:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:32:59,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147200404] [2022-11-03 03:32:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147200404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428053697] [2022-11-03 03:32:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:59,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:59,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:33:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:33:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:33:00,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:33:00,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428053697] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:00,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:33:00,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 03:33:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907659837] [2022-11-03 03:33:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:00,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:33:00,445 INFO L87 Difference]: Start difference. First operand 3197 states and 4434 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) [2022-11-03 03:33:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,597 INFO L93 Difference]: Finished difference Result 4521 states and 5982 transitions. [2022-11-03 03:33:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:33:01,598 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 [2022-11-03 03:33:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,609 INFO L225 Difference]: With dead ends: 4521 [2022-11-03 03:33:01,609 INFO L226 Difference]: Without dead ends: 3530 [2022-11-03 03:33:01,612 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 [2022-11-03 03:33:01,613 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 337 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 732 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:33:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-11-03 03:33:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3277. [2022-11-03 03:33:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 2497 states have (on average 1.3768522226672006) internal successors, (3438), 2524 states have internal predecessors, (3438), 472 states have call successors, (472), 285 states have call predecessors, (472), 306 states have return successors, (634), 469 states have call predecessors, (634), 469 states have call successors, (634) [2022-11-03 03:33:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 4544 transitions. [2022-11-03 03:33:02,047 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 4544 transitions. Word has length 115 [2022-11-03 03:33:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:02,048 INFO L495 AbstractCegarLoop]: Abstraction has 3277 states and 4544 transitions. [2022-11-03 03:33:02,048 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) [2022-11-03 03:33:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 4544 transitions. [2022-11-03 03:33:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 03:33:02,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:02,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:02,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 03:33:02,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 418436461, now seen corresponding path program 1 times [2022-11-03 03:33:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475979448] [2022-11-03 03:33:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:02,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 03:33:02,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475979448] [2022-11-03 03:33:02,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475979448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:02,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:02,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:02,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768598650] [2022-11-03 03:33:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:02,361 INFO L87 Difference]: Start difference. First operand 3277 states and 4544 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:33:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:03,218 INFO L93 Difference]: Finished difference Result 7406 states and 11013 transitions. [2022-11-03 03:33:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-03 03:33:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:03,237 INFO L225 Difference]: With dead ends: 7406 [2022-11-03 03:33:03,238 INFO L226 Difference]: Without dead ends: 5297 [2022-11-03 03:33:03,246 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 [2022-11-03 03:33:03,248 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 220 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:03,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 354 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2022-11-03 03:33:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 5265. [2022-11-03 03:33:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 4101 states have (on average 1.4079492806632528) internal successors, (5774), 4140 states have internal predecessors, (5774), 728 states have call successors, (728), 413 states have call predecessors, (728), 434 states have return successors, (994), 713 states have call predecessors, (994), 725 states have call successors, (994) [2022-11-03 03:33:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 7496 transitions. [2022-11-03 03:33:03,875 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 7496 transitions. Word has length 117 [2022-11-03 03:33:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:03,875 INFO L495 AbstractCegarLoop]: Abstraction has 5265 states and 7496 transitions. [2022-11-03 03:33:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:33:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 7496 transitions. [2022-11-03 03:33:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 03:33:03,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:03,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:03,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 03:33:03,888 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1052891450, now seen corresponding path program 1 times [2022-11-03 03:33:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:03,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480209615] [2022-11-03 03:33:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 03:33:03,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480209615] [2022-11-03 03:33:03,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480209615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:03,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:03,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:03,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884099584] [2022-11-03 03:33:03,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:03,952 INFO L87 Difference]: Start difference. First operand 5265 states and 7496 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:33:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:05,269 INFO L93 Difference]: Finished difference Result 13282 states and 19893 transitions. [2022-11-03 03:33:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-03 03:33:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:05,301 INFO L225 Difference]: With dead ends: 13282 [2022-11-03 03:33:05,301 INFO L226 Difference]: Without dead ends: 9185 [2022-11-03 03:33:05,316 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 [2022-11-03 03:33:05,317 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 223 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:05,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 362 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9185 states. [2022-11-03 03:33:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9185 to 9125. [2022-11-03 03:33:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9125 states, 7213 states have (on average 1.4215998890891446) internal successors, (10254), 7276 states have internal predecessors, (10254), 1220 states have call successors, (1220), 669 states have call predecessors, (1220), 690 states have return successors, (1678), 1181 states have call predecessors, (1678), 1217 states have call successors, (1678) [2022-11-03 03:33:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9125 states to 9125 states and 13152 transitions. [2022-11-03 03:33:06,589 INFO L78 Accepts]: Start accepts. Automaton has 9125 states and 13152 transitions. Word has length 117 [2022-11-03 03:33:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:06,589 INFO L495 AbstractCegarLoop]: Abstraction has 9125 states and 13152 transitions. [2022-11-03 03:33:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:33:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9125 states and 13152 transitions. [2022-11-03 03:33:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:33:06,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:06,613 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] [2022-11-03 03:33:06,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 03:33:06,613 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash -605434975, now seen corresponding path program 1 times [2022-11-03 03:33:06,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:06,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301908368] [2022-11-03 03:33:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:33:07,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301908368] [2022-11-03 03:33:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301908368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55230678] [2022-11-03 03:33:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:07,797 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:07,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:33:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:33:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:33:08,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:33:10,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55230678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:10,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480590133] [2022-11-03 03:33:10,707 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 03:33:10,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:10,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:10,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:10,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:20,303 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 232 for LOIs [2022-11-03 03:33:20,867 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 180 for LOIs [2022-11-03 03:33:20,911 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 176 for LOIs [2022-11-03 03:33:20,956 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2022-11-03 03:33:22,511 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 142 for LOIs [2022-11-03 03:33:22,710 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 90 for LOIs [2022-11-03 03:33:22,878 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 236 for LOIs [2022-11-03 03:33:23,341 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 259 for LOIs [2022-11-03 03:33:23,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:15,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '190975#(and (= ~q_req_up~0 1) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~p_dw_st~0 2) (= 0 ~t5_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= ~local~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_3~0) (<= 0 ~t5_i~0) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:15,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:15,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:15,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-03 03:34:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826369637] [2022-11-03 03:34:15,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 03:34:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 03:34:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=11270, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 03:34:15,385 INFO L87 Difference]: Start difference. First operand 9125 states and 13152 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) [2022-11-03 03:34:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:33,591 INFO L93 Difference]: Finished difference Result 11409 states and 15854 transitions. [2022-11-03 03:34:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-03 03:34:33,591 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 [2022-11-03 03:34:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:33,621 INFO L225 Difference]: With dead ends: 11409 [2022-11-03 03:34:33,621 INFO L226 Difference]: Without dead ends: 10338 [2022-11-03 03:34:33,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 313 SyntacticMatches, 11 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27355 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=6738, Invalid=61644, Unknown=0, NotChecked=0, Total=68382 [2022-11-03 03:34:33,634 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 4356 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 8940 mSolverCounterSat, 2969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4356 SdHoareTripleChecker+Valid, 3203 SdHoareTripleChecker+Invalid, 11909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2969 IncrementalHoareTripleChecker+Valid, 8940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:33,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4356 Valid, 3203 Invalid, 11909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2969 Valid, 8940 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 03:34:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10338 states. [2022-11-03 03:34:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10338 to 8941. [2022-11-03 03:34:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8941 states, 7101 states have (on average 1.425996338543867) internal successors, (10126), 7163 states have internal predecessors, (10126), 1180 states have call successors, (1180), 637 states have call predecessors, (1180), 658 states have return successors, (1628), 1142 states have call predecessors, (1628), 1177 states have call successors, (1628) [2022-11-03 03:34:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8941 states to 8941 states and 12934 transitions. [2022-11-03 03:34:34,772 INFO L78 Accepts]: Start accepts. Automaton has 8941 states and 12934 transitions. Word has length 124 [2022-11-03 03:34:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:34,773 INFO L495 AbstractCegarLoop]: Abstraction has 8941 states and 12934 transitions. [2022-11-03 03:34:34,773 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) [2022-11-03 03:34:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 8941 states and 12934 transitions. [2022-11-03 03:34:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:34:34,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:34,792 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] [2022-11-03 03:34:34,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:35,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 03:34:35,008 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 799033081, now seen corresponding path program 1 times [2022-11-03 03:34:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:35,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338641930] [2022-11-03 03:34:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:35,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:34:35,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:35,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338641930] [2022-11-03 03:34:35,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338641930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:35,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497707052] [2022-11-03 03:34:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:35,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:35,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:35,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:34:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:34:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:34:35,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 03:34:35,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497707052] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:35,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:34:35,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 03:34:35,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964074393] [2022-11-03 03:34:35,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:35,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:34:35,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:35,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:34:35,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:34:35,704 INFO L87 Difference]: Start difference. First operand 8941 states and 12934 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) [2022-11-03 03:34:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:37,499 INFO L93 Difference]: Finished difference Result 9596 states and 13675 transitions. [2022-11-03 03:34:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:34:37,500 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 [2022-11-03 03:34:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:37,526 INFO L225 Difference]: With dead ends: 9596 [2022-11-03 03:34:37,526 INFO L226 Difference]: Without dead ends: 8709 [2022-11-03 03:34:37,532 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 [2022-11-03 03:34:37,533 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 481 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:37,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 697 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:34:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8709 states. [2022-11-03 03:34:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8709 to 8672. [2022-11-03 03:34:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 6902 states have (on average 1.4316140249203129) internal successors, (9881), 6964 states have internal predecessors, (9881), 1144 states have call successors, (1144), 607 states have call predecessors, (1144), 624 states have return successors, (1587), 1102 states have call predecessors, (1587), 1141 states have call successors, (1587) [2022-11-03 03:34:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 12612 transitions. [2022-11-03 03:34:38,799 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 12612 transitions. Word has length 125 [2022-11-03 03:34:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:38,799 INFO L495 AbstractCegarLoop]: Abstraction has 8672 states and 12612 transitions. [2022-11-03 03:34:38,799 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) [2022-11-03 03:34:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 12612 transitions. [2022-11-03 03:34:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:34:38,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:38,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:38,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:39,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:39,016 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -574306045, now seen corresponding path program 1 times [2022-11-03 03:34:39,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:39,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688817688] [2022-11-03 03:34:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:39,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:34:39,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:39,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688817688] [2022-11-03 03:34:39,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688817688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757310197] [2022-11-03 03:34:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:39,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:39,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:39,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:34:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:34:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:34:39,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:39,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757310197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:39,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:39,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:34:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821283019] [2022-11-03 03:34:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:39,478 INFO L87 Difference]: Start difference. First operand 8672 states and 12612 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-11-03 03:34:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:40,729 INFO L93 Difference]: Finished difference Result 15437 states and 22619 transitions. [2022-11-03 03:34:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:40,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 135 [2022-11-03 03:34:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:40,757 INFO L225 Difference]: With dead ends: 15437 [2022-11-03 03:34:40,757 INFO L226 Difference]: Without dead ends: 10729 [2022-11-03 03:34:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:40,774 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 227 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 264 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10729 states. [2022-11-03 03:34:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10729 to 10729. [2022-11-03 03:34:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10729 states, 8724 states have (on average 1.3928243924805135) internal successors, (12151), 8786 states have internal predecessors, (12151), 1221 states have call successors, (1221), 764 states have call predecessors, (1221), 782 states have return successors, (1726), 1180 states have call predecessors, (1726), 1218 states have call successors, (1726) [2022-11-03 03:34:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10729 states to 10729 states and 15098 transitions. [2022-11-03 03:34:42,143 INFO L78 Accepts]: Start accepts. Automaton has 10729 states and 15098 transitions. Word has length 135 [2022-11-03 03:34:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:42,143 INFO L495 AbstractCegarLoop]: Abstraction has 10729 states and 15098 transitions. [2022-11-03 03:34:42,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-11-03 03:34:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10729 states and 15098 transitions. [2022-11-03 03:34:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:34:42,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:42,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:42,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 03:34:42,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 03:34:42,362 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2144103492, now seen corresponding path program 1 times [2022-11-03 03:34:42,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:42,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538842102] [2022-11-03 03:34:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:42,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 03:34:42,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538842102] [2022-11-03 03:34:42,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538842102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145008480] [2022-11-03 03:34:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:42,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:42,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:42,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:34:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:34:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:34:42,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145008480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:42,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:42,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:34:42,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484035350] [2022-11-03 03:34:42,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:42,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:42,862 INFO L87 Difference]: Start difference. First operand 10729 states and 15098 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-03 03:34:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:44,220 INFO L93 Difference]: Finished difference Result 15921 states and 23176 transitions. [2022-11-03 03:34:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-11-03 03:34:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:44,243 INFO L225 Difference]: With dead ends: 15921 [2022-11-03 03:34:44,244 INFO L226 Difference]: Without dead ends: 10773 [2022-11-03 03:34:44,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:44,255 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 126 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:44,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 527 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10773 states. [2022-11-03 03:34:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10773 to 10697. [2022-11-03 03:34:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 8692 states have (on average 1.3721813161527843) internal successors, (11927), 8754 states have internal predecessors, (11927), 1221 states have call successors, (1221), 764 states have call predecessors, (1221), 782 states have return successors, (1726), 1180 states have call predecessors, (1726), 1218 states have call successors, (1726) [2022-11-03 03:34:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 14874 transitions. [2022-11-03 03:34:45,540 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 14874 transitions. Word has length 135 [2022-11-03 03:34:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 10697 states and 14874 transitions. [2022-11-03 03:34:45,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-03 03:34:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 14874 transitions. [2022-11-03 03:34:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:34:45,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:45,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:45,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 03:34:45,758 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -35727452, now seen corresponding path program 1 times [2022-11-03 03:34:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746170269] [2022-11-03 03:34:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 03:34:46,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:46,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746170269] [2022-11-03 03:34:46,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746170269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:46,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610564471] [2022-11-03 03:34:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:46,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:46,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:46,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:46,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:34:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:34:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:34:46,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:46,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610564471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:46,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:46,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:34:46,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168985598] [2022-11-03 03:34:46,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:46,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:46,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:46,205 INFO L87 Difference]: Start difference. First operand 10697 states and 14874 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-03 03:34:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:48,259 INFO L93 Difference]: Finished difference Result 20888 states and 30001 transitions. [2022-11-03 03:34:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 135 [2022-11-03 03:34:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:48,292 INFO L225 Difference]: With dead ends: 20888 [2022-11-03 03:34:48,293 INFO L226 Difference]: Without dead ends: 14949 [2022-11-03 03:34:48,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:48,312 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 148 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:48,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 545 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14949 states. [2022-11-03 03:34:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14949 to 14705. [2022-11-03 03:34:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14705 states, 12001 states have (on average 1.37088575952004) internal successors, (16452), 12079 states have internal predecessors, (16452), 1651 states have call successors, (1651), 1034 states have call predecessors, (1651), 1051 states have return successors, (2583), 1593 states have call predecessors, (2583), 1648 states have call successors, (2583) [2022-11-03 03:34:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14705 states to 14705 states and 20686 transitions. [2022-11-03 03:34:50,203 INFO L78 Accepts]: Start accepts. Automaton has 14705 states and 20686 transitions. Word has length 135 [2022-11-03 03:34:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:50,203 INFO L495 AbstractCegarLoop]: Abstraction has 14705 states and 20686 transitions. [2022-11-03 03:34:50,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-03 03:34:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 14705 states and 20686 transitions. [2022-11-03 03:34:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:34:50,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:50,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:50,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-03 03:34:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 03:34:50,428 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2107410532, now seen corresponding path program 1 times [2022-11-03 03:34:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627447319] [2022-11-03 03:34:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 03:34:50,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:50,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627447319] [2022-11-03 03:34:50,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627447319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:50,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071609017] [2022-11-03 03:34:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:50,730 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:50,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:34:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:34:50,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:34:50,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:50,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071609017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:50,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:50,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:34:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990368628] [2022-11-03 03:34:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:50,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:50,966 INFO L87 Difference]: Start difference. First operand 14705 states and 20686 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-11-03 03:34:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:53,013 INFO L93 Difference]: Finished difference Result 21961 states and 32068 transitions. [2022-11-03 03:34:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-11-03 03:34:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:53,056 INFO L225 Difference]: With dead ends: 21961 [2022-11-03 03:34:53,056 INFO L226 Difference]: Without dead ends: 14765 [2022-11-03 03:34:53,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:53,077 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 128 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 520 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14765 states. [2022-11-03 03:34:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14765 to 14657. [2022-11-03 03:34:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14657 states, 11953 states have (on average 1.349619342424496) internal successors, (16132), 12031 states have internal predecessors, (16132), 1651 states have call successors, (1651), 1034 states have call predecessors, (1651), 1051 states have return successors, (2583), 1593 states have call predecessors, (2583), 1648 states have call successors, (2583) [2022-11-03 03:34:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14657 states to 14657 states and 20366 transitions. [2022-11-03 03:34:55,149 INFO L78 Accepts]: Start accepts. Automaton has 14657 states and 20366 transitions. Word has length 135 [2022-11-03 03:34:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:55,149 INFO L495 AbstractCegarLoop]: Abstraction has 14657 states and 20366 transitions. [2022-11-03 03:34:55,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-11-03 03:34:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14657 states and 20366 transitions. [2022-11-03 03:34:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:34:55,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:55,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:55,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:55,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 03:34:55,384 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1539782302, now seen corresponding path program 1 times [2022-11-03 03:34:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589522574] [2022-11-03 03:34:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 03:34:55,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589522574] [2022-11-03 03:34:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589522574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304264009] [2022-11-03 03:34:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:55,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:55,599 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:55,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:34:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:34:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:55,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:55,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304264009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:55,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:55,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:34:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716737864] [2022-11-03 03:34:55,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:55,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:55,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:34:55,841 INFO L87 Difference]: Start difference. First operand 14657 states and 20366 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-11-03 03:34:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:59,129 INFO L93 Difference]: Finished difference Result 43614 states and 61839 transitions. [2022-11-03 03:34:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:59,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 135 [2022-11-03 03:34:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:59,208 INFO L225 Difference]: With dead ends: 43614 [2022-11-03 03:34:59,208 INFO L226 Difference]: Without dead ends: 29673 [2022-11-03 03:34:59,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:34:59,242 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 244 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:59,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 806 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29673 states. [2022-11-03 03:35:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29673 to 29435. [2022-11-03 03:35:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29435 states, 24215 states have (on average 1.341399958703283) internal successors, (32482), 24469 states have internal predecessors, (32482), 3121 states have call successors, (3121), 1968 states have call predecessors, (3121), 2097 states have return successors, (6272), 2999 states have call predecessors, (6272), 3118 states have call successors, (6272) [2022-11-03 03:35:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29435 states to 29435 states and 41875 transitions. [2022-11-03 03:35:03,324 INFO L78 Accepts]: Start accepts. Automaton has 29435 states and 41875 transitions. Word has length 135 [2022-11-03 03:35:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:03,324 INFO L495 AbstractCegarLoop]: Abstraction has 29435 states and 41875 transitions. [2022-11-03 03:35:03,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-11-03 03:35:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 29435 states and 41875 transitions. [2022-11-03 03:35:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:35:03,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:03,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:03,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:03,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:03,559 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1147038393, now seen corresponding path program 2 times [2022-11-03 03:35:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860698024] [2022-11-03 03:35:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:35:03,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860698024] [2022-11-03 03:35:03,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860698024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820721769] [2022-11-03 03:35:03,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:03,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:03,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0356e233-58ad-41c2-a7fc-12f0dec6c6b3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:35:03,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:03,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:35:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:35:04,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:35:04,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820721769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070291625] [2022-11-03 03:35:04,537 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2022-11-03 03:35:04,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:04,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:04,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:04,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:13,820 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 84 for LOIs [2022-11-03 03:35:13,825 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 158 for LOIs [2022-11-03 03:35:13,874 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-03 03:35:21,964 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12