./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/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_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/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_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- 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 01:40:21,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:21,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:21,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:21,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:21,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:21,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:21,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:21,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:21,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:21,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:21,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:21,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:21,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:21,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:21,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:21,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:21,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:21,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:21,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:21,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:21,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:21,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:21,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:21,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:21,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:21,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:21,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:21,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:21,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:21,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:21,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:21,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:21,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:21,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:21,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:21,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:21,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:21,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:21,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:21,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:21,953 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:21,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:21,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:21,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:21,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:21,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:21,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:21,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:21,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:21,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:21,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:22,000 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:22,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:22,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:22,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:22,001 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:22,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:22,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:22,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:22,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:22,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:22,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:22,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:22,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:22,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:22,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:22,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:22,005 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:22,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:22,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:22,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:22,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:22,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:22,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:22,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:22,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:22,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:22,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:22,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:22,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:22,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:22,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:22,008 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_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2022-11-03 01:40:22,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:22,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:22,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:22,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:22,307 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:22,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-11-03 01:40:22,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/data/dcdbac621/295444d81c0640b0943c5776ca9f06f9/FLAGf53ddb96d [2022-11-03 01:40:22,925 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:22,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-11-03 01:40:22,963 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/data/dcdbac621/295444d81c0640b0943c5776ca9f06f9/FLAGf53ddb96d [2022-11-03 01:40:23,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/data/dcdbac621/295444d81c0640b0943c5776ca9f06f9 [2022-11-03 01:40:23,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:23,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:23,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:23,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:23,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:23,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:23,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fcc8b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23, skipping insertion in model container [2022-11-03 01:40:23,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:23,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:23,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:23,792 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_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-11-03 01:40:23,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:23,805 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:23,937 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_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-11-03 01:40:23,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:23,978 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23 WrapperNode [2022-11-03 01:40:23,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:23,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:23,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:23,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:23,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,094 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 907 [2022-11-03 01:40:24,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:24,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:24,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:24,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:24,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:24,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:24,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:24,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:24,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (1/1) ... [2022-11-03 01:40:24,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:24,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:24,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:24,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:24,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:24,293 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 01:40:24,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 01:40:24,293 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 01:40:24,293 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 01:40:24,294 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:40:24,294 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:40:24,294 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:40:24,294 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:40:24,294 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:40:24,294 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:40:24,295 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:40:24,295 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:40:24,295 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 01:40:24,295 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 01:40:24,295 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:40:24,295 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:40:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 01:40:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 01:40:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:40:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:40:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:40:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:40:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 01:40:24,297 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 01:40:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:40:24,297 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:40:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:40:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:40:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:40:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:40:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:40:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:40:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:40:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:40:24,299 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:40:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:40:24,299 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:40:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:40:24,299 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:40:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:40:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:40:24,300 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:40:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 01:40:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 01:40:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:40:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:40:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:40:24,304 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:40:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:40:24,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:40:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:24,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:40:24,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:40:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 01:40:24,306 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 01:40:24,481 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:24,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:25,853 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:26,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:26,666 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:40:26,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:26 BoogieIcfgContainer [2022-11-03 01:40:26,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:26,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:26,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:26,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:26,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:23" (1/3) ... [2022-11-03 01:40:26,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:26, skipping insertion in model container [2022-11-03 01:40:26,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:23" (2/3) ... [2022-11-03 01:40:26,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:26, skipping insertion in model container [2022-11-03 01:40:26,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:26" (3/3) ... [2022-11-03 01:40:26,679 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2022-11-03 01:40:26,700 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:26,700 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:40:26,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:26,791 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;@18a42229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:26,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:40:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-03 01:40:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:40:26,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:26,820 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] [2022-11-03 01:40:26,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1944188570, now seen corresponding path program 1 times [2022-11-03 01:40:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:26,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718884086] [2022-11-03 01:40:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:27,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718884086] [2022-11-03 01:40:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718884086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:27,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:27,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531825581] [2022-11-03 01:40:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:27,594 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:40:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:28,165 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2022-11-03 01:40:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-03 01:40:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:28,188 INFO L225 Difference]: With dead ends: 1143 [2022-11-03 01:40:28,189 INFO L226 Difference]: Without dead ends: 755 [2022-11-03 01:40:28,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:40:28,200 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 577 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:28,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1259 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-03 01:40:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2022-11-03 01:40:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2022-11-03 01:40:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2022-11-03 01:40:28,318 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2022-11-03 01:40:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:28,319 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2022-11-03 01:40:28,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:40:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2022-11-03 01:40:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 01:40:28,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:28,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:28,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:28,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash -991761311, now seen corresponding path program 1 times [2022-11-03 01:40:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456739394] [2022-11-03 01:40:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:40:28,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456739394] [2022-11-03 01:40:28,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456739394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:28,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066943675] [2022-11-03 01:40:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:28,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:28,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:40:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:40:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:40:29,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066943675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:29,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:29,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 01:40:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722127169] [2022-11-03 01:40:29,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:40:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:40:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:40:29,567 INFO L87 Difference]: Start difference. First operand 719 states and 1125 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:40:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:30,300 INFO L93 Difference]: Finished difference Result 1692 states and 2622 transitions. [2022-11-03 01:40:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:40:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-03 01:40:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:30,309 INFO L225 Difference]: With dead ends: 1692 [2022-11-03 01:40:30,309 INFO L226 Difference]: Without dead ends: 984 [2022-11-03 01:40:30,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:40:30,315 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 391 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:30,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2469 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:40:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-03 01:40:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2022-11-03 01:40:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 645 states have (on average 1.4806201550387597) internal successors, (955), 672 states have internal predecessors, (955), 249 states have call successors, (249), 75 states have call predecessors, (249), 75 states have return successors, (279), 236 states have call predecessors, (279), 245 states have call successors, (279) [2022-11-03 01:40:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1483 transitions. [2022-11-03 01:40:30,430 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1483 transitions. Word has length 86 [2022-11-03 01:40:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1483 transitions. [2022-11-03 01:40:30,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:40:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1483 transitions. [2022-11-03 01:40:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 01:40:30,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:30,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:30,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:30,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1499789824, now seen corresponding path program 1 times [2022-11-03 01:40:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:30,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940977530] [2022-11-03 01:40:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:40:31,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940977530] [2022-11-03 01:40:31,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940977530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:31,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:31,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:40:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911090792] [2022-11-03 01:40:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:40:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:40:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:40:31,040 INFO L87 Difference]: Start difference. First operand 970 states and 1483 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:40:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:33,754 INFO L93 Difference]: Finished difference Result 2917 states and 4521 transitions. [2022-11-03 01:40:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:40:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-03 01:40:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:33,770 INFO L225 Difference]: With dead ends: 2917 [2022-11-03 01:40:33,770 INFO L226 Difference]: Without dead ends: 1960 [2022-11-03 01:40:33,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:40:33,778 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 1129 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:33,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 1541 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:40:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-11-03 01:40:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1716. [2022-11-03 01:40:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1155 states have (on average 1.503030303030303) internal successors, (1736), 1205 states have internal predecessors, (1736), 427 states have call successors, (427), 131 states have call predecessors, (427), 133 states have return successors, (485), 406 states have call predecessors, (485), 421 states have call successors, (485) [2022-11-03 01:40:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2648 transitions. [2022-11-03 01:40:33,908 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2648 transitions. Word has length 87 [2022-11-03 01:40:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:33,909 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2648 transitions. [2022-11-03 01:40:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:40:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2648 transitions. [2022-11-03 01:40:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 01:40:33,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:33,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:33,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:40:33,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash -805167231, now seen corresponding path program 1 times [2022-11-03 01:40:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:33,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945021131] [2022-11-03 01:40:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:40:34,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:34,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945021131] [2022-11-03 01:40:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945021131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:34,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:34,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:40:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260034068] [2022-11-03 01:40:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:40:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:40:34,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:40:34,432 INFO L87 Difference]: Start difference. First operand 1716 states and 2648 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:40:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:37,610 INFO L93 Difference]: Finished difference Result 2094 states and 3320 transitions. [2022-11-03 01:40:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:40:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-03 01:40:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:37,623 INFO L225 Difference]: With dead ends: 2094 [2022-11-03 01:40:37,624 INFO L226 Difference]: Without dead ends: 2092 [2022-11-03 01:40:37,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:40:37,626 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 1459 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:37,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 2296 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 01:40:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2022-11-03 01:40:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1896. [2022-11-03 01:40:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2022-11-03 01:40:37,771 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 91 [2022-11-03 01:40:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:37,771 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2022-11-03 01:40:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:40:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2022-11-03 01:40:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 01:40:37,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:37,783 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 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 01:40:37,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:40:37,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2065101882, now seen corresponding path program 1 times [2022-11-03 01:40:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83497745] [2022-11-03 01:40:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 01:40:38,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83497745] [2022-11-03 01:40:38,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83497745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:38,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:38,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928089655] [2022-11-03 01:40:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:38,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:38,046 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:40:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:38,347 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2022-11-03 01:40:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-11-03 01:40:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:38,369 INFO L225 Difference]: With dead ends: 3878 [2022-11-03 01:40:38,369 INFO L226 Difference]: Without dead ends: 1994 [2022-11-03 01:40:38,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 01:40:38,388 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 30 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:38,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1657 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-11-03 01:40:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2022-11-03 01:40:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2022-11-03 01:40:38,538 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2022-11-03 01:40:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:38,539 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2022-11-03 01:40:38,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:40:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2022-11-03 01:40:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:40:38,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:38,545 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:40:38,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1426663863, now seen corresponding path program 1 times [2022-11-03 01:40:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:38,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654645413] [2022-11-03 01:40:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 01:40:38,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654645413] [2022-11-03 01:40:38,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654645413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160566643] [2022-11-03 01:40:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:38,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:38,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:38,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:40:39,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:39,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160566643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:39,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:39,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-03 01:40:39,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967101210] [2022-11-03 01:40:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:40:39,343 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:39,756 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2022-11-03 01:40:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:39,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2022-11-03 01:40:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:39,770 INFO L225 Difference]: With dead ends: 3960 [2022-11-03 01:40:39,770 INFO L226 Difference]: Without dead ends: 2064 [2022-11-03 01:40:39,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:39,782 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:39,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-03 01:40:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2022-11-03 01:40:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2022-11-03 01:40:39,927 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2022-11-03 01:40:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:39,928 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2022-11-03 01:40:39,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2022-11-03 01:40:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:40:39,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:39,935 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:39,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:40,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:40,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2024418628, now seen corresponding path program 1 times [2022-11-03 01:40:40,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:40,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070540724] [2022-11-03 01:40:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:40,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 01:40:40,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:40,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070540724] [2022-11-03 01:40:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070540724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691894096] [2022-11-03 01:40:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:40,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:40,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:40,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:40:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:40:40,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:40,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691894096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:40,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:40,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:40:40,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010992141] [2022-11-03 01:40:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:40,725 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:41,144 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2022-11-03 01:40:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-11-03 01:40:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:41,164 INFO L225 Difference]: With dead ends: 4272 [2022-11-03 01:40:41,164 INFO L226 Difference]: Without dead ends: 2220 [2022-11-03 01:40:41,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 01:40:41,178 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:41,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-11-03 01:40:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2022-11-03 01:40:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2022-11-03 01:40:41,401 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2022-11-03 01:40:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:41,402 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2022-11-03 01:40:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2022-11-03 01:40:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 01:40:41,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:41,411 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:41,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 01:40:41,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:40:41,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash -309415756, now seen corresponding path program 1 times [2022-11-03 01:40:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466286712] [2022-11-03 01:40:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:41,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:40:41,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466286712] [2022-11-03 01:40:41,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466286712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739011479] [2022-11-03 01:40:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:41,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:41,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:40:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:40:42,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:42,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739011479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:42,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:42,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:40:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908882415] [2022-11-03 01:40:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:42,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:42,241 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:42,628 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2022-11-03 01:40:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 138 [2022-11-03 01:40:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:42,645 INFO L225 Difference]: With dead ends: 4584 [2022-11-03 01:40:42,645 INFO L226 Difference]: Without dead ends: 2376 [2022-11-03 01:40:42,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 01:40:42,658 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:42,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-11-03 01:40:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2022-11-03 01:40:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2022-11-03 01:40:42,854 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2022-11-03 01:40:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:42,854 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2022-11-03 01:40:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2022-11-03 01:40:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 01:40:42,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:42,862 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:42,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:40:43,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 157259863, now seen corresponding path program 1 times [2022-11-03 01:40:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:43,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331051073] [2022-11-03 01:40:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:40:43,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:43,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331051073] [2022-11-03 01:40:43,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331051073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:43,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851065406] [2022-11-03 01:40:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:43,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:43,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:43,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:43,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:40:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:40:43,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:43,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851065406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:43,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:43,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:40:43,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825121010] [2022-11-03 01:40:43,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:43,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:43,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:43,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:43,644 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:44,060 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2022-11-03 01:40:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2022-11-03 01:40:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:44,076 INFO L225 Difference]: With dead ends: 4896 [2022-11-03 01:40:44,076 INFO L226 Difference]: Without dead ends: 2532 [2022-11-03 01:40:44,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 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 01:40:44,090 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:44,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-11-03 01:40:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2022-11-03 01:40:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2022-11-03 01:40:44,270 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2022-11-03 01:40:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:44,270 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2022-11-03 01:40:44,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:40:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2022-11-03 01:40:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:40:44,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:44,280 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:44,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:44,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:44,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1629096711, now seen corresponding path program 1 times [2022-11-03 01:40:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10220665] [2022-11-03 01:40:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:40:44,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10220665] [2022-11-03 01:40:44,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10220665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:44,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:44,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800246806] [2022-11-03 01:40:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:44,663 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:40:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:45,094 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2022-11-03 01:40:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2022-11-03 01:40:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:45,110 INFO L225 Difference]: With dead ends: 5220 [2022-11-03 01:40:45,110 INFO L226 Difference]: Without dead ends: 2668 [2022-11-03 01:40:45,120 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 01:40:45,121 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:45,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-11-03 01:40:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2022-11-03 01:40:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-11-03 01:40:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2022-11-03 01:40:45,273 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2022-11-03 01:40:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:45,274 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2022-11-03 01:40:45,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:40:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2022-11-03 01:40:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:40:45,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:45,281 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:45,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:40:45,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1638086922, now seen corresponding path program 1 times [2022-11-03 01:40:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113534889] [2022-11-03 01:40:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:40:45,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113534889] [2022-11-03 01:40:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113534889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:45,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:45,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:40:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112919579] [2022-11-03 01:40:45,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:40:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:40:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:40:45,654 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-03 01:40:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:49,981 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2022-11-03 01:40:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:40:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 143 [2022-11-03 01:40:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:50,015 INFO L225 Difference]: With dead ends: 6865 [2022-11-03 01:40:50,015 INFO L226 Difference]: Without dead ends: 3844 [2022-11-03 01:40:50,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:40:50,030 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 1652 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:50,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2365 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 01:40:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-11-03 01:40:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2022-11-03 01:40:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2022-11-03 01:40:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2022-11-03 01:40:50,297 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2022-11-03 01:40:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:50,297 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2022-11-03 01:40:50,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-03 01:40:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2022-11-03 01:40:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 01:40:50,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:50,304 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:40:50,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -449202972, now seen corresponding path program 1 times [2022-11-03 01:40:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:50,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849126104] [2022-11-03 01:40:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 01:40:54,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849126104] [2022-11-03 01:40:54,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849126104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517297196] [2022-11-03 01:40:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:54,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:54,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:54,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:54,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43aac80-8cab-4f81-96d2-9ca0dffe9b7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:40:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 01:40:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:40:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:47,740 WARN L234 SmtUtils]: Spent 47.07s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 01:42:35,640 WARN L234 SmtUtils]: Spent 46.45s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 01:42:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:42:37,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517297196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644627881] [2022-11-03 01:42:37,433 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-11-03 01:42:37,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:37,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:37,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:37,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:40,224 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-03 01:42:49,346 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-03 01:43:05,947 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 120 for LOIs [2022-11-03 01:43:06,487 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 511 for LOIs [2022-11-03 01:43:06,811 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 508 for LOIs [2022-11-03 01:43:08,805 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 461 for LOIs [2022-11-03 01:43:08,912 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 431 for LOIs [2022-11-03 01:43:08,975 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-03 01:43:12,182 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-03 01:43:12,729 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-03 01:43:12,861 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 444 for LOIs [2022-11-03 01:43:13,899 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 45 for LOIs [2022-11-03 01:43:13,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:41,771 WARN L234 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:43:49,424 WARN L234 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:43:58,962 WARN L234 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:19,894 WARN L234 SmtUtils]: Spent 9.41s on a formula simplification. DAG size of input: 511 DAG size of output: 449 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:31,610 WARN L234 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 515 DAG size of output: 454 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:37,852 WARN L234 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:44,104 WARN L234 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:03,069 WARN L234 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:09,387 WARN L234 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:15,643 WARN L234 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 613 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:46,759 WARN L234 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 615 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:53,212 WARN L234 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:59,775 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 624 DAG size of output: 593 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:13,871 WARN L234 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 622 DAG size of output: 593 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:23,443 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:30,193 WARN L234 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 629 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:36,954 WARN L234 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 630 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:46,589 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 635 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:46:53,470 WARN L234 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 631 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:01,926 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 637 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:08,933 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 633 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:17,522 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 639 DAG size of output: 609 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:24,623 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 635 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:33,358 WARN L234 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 641 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:40,509 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 637 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:49,370 WARN L234 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 643 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:56,612 WARN L234 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 639 DAG size of output: 609 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:48:10,311 WARN L234 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 625 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:48:17,108 WARN L234 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 649 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:48:25,753 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 552 DAG size of output: 473 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:06,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90712#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= |old(~floorButtons_2~0)| 0) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select (select |#memory_int| 34) 2) 105) (= |old(~persons_1~0)| 0) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= (select |#valid| 33) 1) (= |old(~blocked~0)| 0) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= ~calls_0~0 0) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= |old(~weight~0)| 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= ~persons_4~0 0) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= ~personOnFloor_0_0~0 0) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= 32 (select |#length| 2)) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= ~persons_3~0 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~31#1|) (= |old(~doorState~0)| |timeShift_~tmp~28#1|) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= |old(~floorButtons_4~0)| 0) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= |old(~persons_0~0)| 0) (= (select |#valid| 1) 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~13#1| |timeShift_isExecutiveFloor_#res#1|) (= (select |#valid| 20) 1) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (= (select |#length| 37) 9) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= ~doorState~0 1) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= ~floorButtons_0~0 0) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= ~currentFloorID~0 0) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= |timeShift_isExecutiveFloor_~retValue_acc~31#1| |timeShift_isExecutiveFloor_#res#1|) (= ~persons_0~0 0) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= |old(~floorButtons_3~0)| 0) (= 4 (select |#length| 18)) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= |old(~currentHeading~0)| 1) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= |old(~floorButtons_1~0)| 0) (= (select (select |#memory_int| 36) 0) 10) (= |old(~currentFloorID~0)| 0) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= |timeShift_isExecutiveFloor_~retValue_acc~31#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~31#1|) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= ~persons_2~0 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-11-03 01:49:06,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:49:06,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:06,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 20, 16] total 72 [2022-11-03 01:49:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139729868] [2022-11-03 01:49:06,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 01:49:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 01:49:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=18069, Unknown=0, NotChecked=0, Total=19460 [2022-11-03 01:49:06,190 INFO L87 Difference]: Start difference. First operand 3666 states and 5655 transitions. Second operand has 72 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 57 states have internal predecessors, (212), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57)