./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/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_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-8393723 [2022-11-19 06:59:58,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:59:58,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:59:58,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:59:58,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:59:58,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:59:58,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:59:58,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:59:58,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:59:58,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:59:58,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:59:58,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:59:58,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:59:58,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:59:58,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:59:58,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:59:58,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:59:58,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:59:58,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:59:58,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:59:58,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:59:58,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:59:58,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:59:58,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:59:58,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:59:58,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:59:58,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:59:58,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:59:58,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:59:58,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:59:58,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:59:58,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:59:58,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:59:58,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:59:58,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:59:58,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:59:58,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:59:58,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:59:58,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:59:58,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:59:58,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:59:58,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:59:58,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:59:58,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:59:58,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:59:58,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:59:58,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:59:58,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:59:58,169 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:59:58,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:59:58,170 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:59:58,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:59:58,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:59:58,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:59:58,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:59:58,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:59:58,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:59:58,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:59:58,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:59:58,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:59:58,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:59:58,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:59:58,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:59:58,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:59:58,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:59:58,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:59:58,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:59:58,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:59:58,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:59:58,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:59:58,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:59:58,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:59:58,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:59:58,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:59:58,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:59:58,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:59:58,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:59:58,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:59:58,178 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_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2022-11-19 06:59:58,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:59:58,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:59:58,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:59:58,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:59:58,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:59:58,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-11-19 06:59:58,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/data/1bd92b6a9/810c82221c1d48fc85f5de5b8456cabb/FLAGb800d96a6 [2022-11-19 06:59:59,232 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:59:59,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-11-19 06:59:59,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/data/1bd92b6a9/810c82221c1d48fc85f5de5b8456cabb/FLAGb800d96a6 [2022-11-19 06:59:59,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/data/1bd92b6a9/810c82221c1d48fc85f5de5b8456cabb [2022-11-19 06:59:59,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:59:59,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:59:59,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:59:59,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:59:59,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:59:59,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:59" (1/1) ... [2022-11-19 06:59:59,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390baf89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:59, skipping insertion in model container [2022-11-19 06:59:59,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:59" (1/1) ... [2022-11-19 06:59:59,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:59:59,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:00:00,167 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-11-19 07:00:00,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:00:00,189 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:00:00,371 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-11-19 07:00:00,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:00:00,405 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:00:00,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00 WrapperNode [2022-11-19 07:00:00,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:00:00,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:00:00,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:00:00,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:00:00,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,515 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 907 [2022-11-19 07:00:00,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:00:00,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:00:00,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:00:00,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:00:00,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:00:00,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:00:00,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:00:00,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:00:00,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (1/1) ... [2022-11-19 07:00:00,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:00:00,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:00,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:00:00,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:00:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:00:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 07:00:00,726 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 07:00:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:00:00,726 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:00:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 07:00:00,727 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 07:00:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:00:00,727 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:00:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 07:00:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 07:00:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:00:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:00:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-19 07:00:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-19 07:00:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:00:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:00:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:00:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:00:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:00:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:00:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:00:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:00:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 07:00:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 07:00:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:00:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:00:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:00:00,732 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:00:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:00:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:00:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 07:00:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 07:00:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:00:00,735 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:00:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:00:00,735 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:00:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:00:00,736 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:00:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:00:00,736 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:00:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:00:00,737 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:00:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:00:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:00:00,738 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:00:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:00:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:00:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:00:00,741 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:00:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:00:00,741 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:00:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:00:00,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:00:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:00:00,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:00:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-19 07:00:00,743 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-19 07:00:00,986 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:00:00,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:00:02,615 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:00:03,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:00:03,428 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:00:03,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:00:03 BoogieIcfgContainer [2022-11-19 07:00:03,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:00:03,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:00:03,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:00:03,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:00:03,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:59:59" (1/3) ... [2022-11-19 07:00:03,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324c3d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:00:03, skipping insertion in model container [2022-11-19 07:00:03,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:00" (2/3) ... [2022-11-19 07:00:03,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324c3d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:00:03, skipping insertion in model container [2022-11-19 07:00:03,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:00:03" (3/3) ... [2022-11-19 07:00:03,445 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2022-11-19 07:00:03,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:00:03,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:00:03,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:00:03,584 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;@5b673fce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:00:03,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:00:03,594 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) [2022-11-19 07:00:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:00:03,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:03,611 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] [2022-11-19 07:00:03,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1944188570, now seen corresponding path program 1 times [2022-11-19 07:00:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482313774] [2022-11-19 07:00:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:04,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482313774] [2022-11-19 07:00:04,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482313774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:04,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:04,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392231107] [2022-11-19 07:00:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:04,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:00:04,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:00:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:00:04,486 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) [2022-11-19 07:00:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:05,137 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2022-11-19 07:00:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:05,141 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 [2022-11-19 07:00:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:05,173 INFO L225 Difference]: With dead ends: 1143 [2022-11-19 07:00:05,180 INFO L226 Difference]: Without dead ends: 755 [2022-11-19 07:00:05,192 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 [2022-11-19 07:00:05,197 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 577 mSDsluCounter, 545 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:05,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1259 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:00:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-19 07:00:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2022-11-19 07:00:05,369 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) [2022-11-19 07:00:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2022-11-19 07:00:05,388 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2022-11-19 07:00:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:05,389 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2022-11-19 07:00:05,390 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) [2022-11-19 07:00:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2022-11-19 07:00:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:00:05,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:05,409 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] [2022-11-19 07:00:05,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:00:05,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -991761311, now seen corresponding path program 1 times [2022-11-19 07:00:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:05,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200918269] [2022-11-19 07:00:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:00:05,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200918269] [2022-11-19 07:00:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200918269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924808136] [2022-11-19 07:00:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:05,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:05,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:05,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:00:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:00:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:00:06,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:06,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924808136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:06,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:06,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-19 07:00:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579544863] [2022-11-19 07:00:06,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:06,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:00:06,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:00:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:00:06,504 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) [2022-11-19 07:00:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:07,261 INFO L93 Difference]: Finished difference Result 1692 states and 2622 transitions. [2022-11-19 07:00:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:00:07,262 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 [2022-11-19 07:00:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:07,270 INFO L225 Difference]: With dead ends: 1692 [2022-11-19 07:00:07,270 INFO L226 Difference]: Without dead ends: 984 [2022-11-19 07:00:07,274 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 [2022-11-19 07:00:07,275 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 392 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:07,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 2469 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:00:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-19 07:00:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2022-11-19 07:00:07,361 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) [2022-11-19 07:00:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1483 transitions. [2022-11-19 07:00:07,376 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1483 transitions. Word has length 86 [2022-11-19 07:00:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:07,377 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1483 transitions. [2022-11-19 07:00:07,378 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) [2022-11-19 07:00:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1483 transitions. [2022-11-19 07:00:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:00:07,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:07,383 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] [2022-11-19 07:00:07,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:07,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:07,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:07,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1499789824, now seen corresponding path program 1 times [2022-11-19 07:00:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:07,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670187186] [2022-11-19 07:00:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:07,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:00:08,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670187186] [2022-11-19 07:00:08,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670187186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:08,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:08,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:00:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701387219] [2022-11-19 07:00:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:00:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:00:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:00:08,081 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) [2022-11-19 07:00:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:10,979 INFO L93 Difference]: Finished difference Result 2917 states and 4521 transitions. [2022-11-19 07:00:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:00:10,980 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 [2022-11-19 07:00:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:10,995 INFO L225 Difference]: With dead ends: 2917 [2022-11-19 07:00:10,995 INFO L226 Difference]: Without dead ends: 1960 [2022-11-19 07:00:11,001 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 [2022-11-19 07:00:11,002 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1155 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:11,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1253 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 07:00:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-11-19 07:00:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1716. [2022-11-19 07:00:11,139 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) [2022-11-19 07:00:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2648 transitions. [2022-11-19 07:00:11,155 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2648 transitions. Word has length 87 [2022-11-19 07:00:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:11,157 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2648 transitions. [2022-11-19 07:00:11,157 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) [2022-11-19 07:00:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2648 transitions. [2022-11-19 07:00:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:00:11,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:11,163 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] [2022-11-19 07:00:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:00:11,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -805167231, now seen corresponding path program 1 times [2022-11-19 07:00:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:11,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234915710] [2022-11-19 07:00:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:00:11,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234915710] [2022-11-19 07:00:11,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234915710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:11,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:00:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92071833] [2022-11-19 07:00:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:00:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:00:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:00:11,648 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) [2022-11-19 07:00:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:14,997 INFO L93 Difference]: Finished difference Result 2094 states and 3320 transitions. [2022-11-19 07:00:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:00:14,998 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 [2022-11-19 07:00:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:15,013 INFO L225 Difference]: With dead ends: 2094 [2022-11-19 07:00:15,013 INFO L226 Difference]: Without dead ends: 2092 [2022-11-19 07:00:15,016 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 [2022-11-19 07:00:15,017 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1462 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 862 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 862 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:15,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 2013 Invalid, 4265 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [862 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:00:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2022-11-19 07:00:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1896. [2022-11-19 07:00:15,197 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) [2022-11-19 07:00:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2022-11-19 07:00:15,219 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 91 [2022-11-19 07:00:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:15,222 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2022-11-19 07:00:15,222 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) [2022-11-19 07:00:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2022-11-19 07:00:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:00:15,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:15,235 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] [2022-11-19 07:00:15,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:00:15,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2065101882, now seen corresponding path program 1 times [2022-11-19 07:00:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:15,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317630500] [2022-11-19 07:00:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:00:15,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:15,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317630500] [2022-11-19 07:00:15,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317630500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:15,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:15,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:00:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019451022] [2022-11-19 07:00:15,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:15,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:15,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:15,528 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) [2022-11-19 07:00:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:15,815 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2022-11-19 07:00:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:15,816 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 [2022-11-19 07:00:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:15,835 INFO L225 Difference]: With dead ends: 3878 [2022-11-19 07:00:15,836 INFO L226 Difference]: Without dead ends: 1994 [2022-11-19 07:00:15,849 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 [2022-11-19 07:00:15,852 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 30 mSDsluCounter, 1093 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 [2022-11-19 07:00:15,853 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] [2022-11-19 07:00:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-11-19 07:00:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2022-11-19 07:00:16,018 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) [2022-11-19 07:00:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2022-11-19 07:00:16,033 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2022-11-19 07:00:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:16,034 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2022-11-19 07:00:16,034 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) [2022-11-19 07:00:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2022-11-19 07:00:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:00:16,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:16,039 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] [2022-11-19 07:00:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:00:16,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1426663863, now seen corresponding path program 1 times [2022-11-19 07:00:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:16,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968233771] [2022-11-19 07:00:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:00:16,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968233771] [2022-11-19 07:00:16,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968233771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373952848] [2022-11-19 07:00:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:16,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:16,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:16,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:00:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:00:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:00:16,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:16,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373952848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:16,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:16,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-19 07:00:16,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70642211] [2022-11-19 07:00:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:16,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:16,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:16,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:00:16,936 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) [2022-11-19 07:00:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:17,379 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2022-11-19 07:00:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:17,380 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 [2022-11-19 07:00:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:17,401 INFO L225 Difference]: With dead ends: 3960 [2022-11-19 07:00:17,402 INFO L226 Difference]: Without dead ends: 2064 [2022-11-19 07:00:17,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:00:17,418 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:17,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:00:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-19 07:00:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2022-11-19 07:00:17,609 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) [2022-11-19 07:00:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2022-11-19 07:00:17,626 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2022-11-19 07:00:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:17,626 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2022-11-19 07:00:17,627 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) [2022-11-19 07:00:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2022-11-19 07:00:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:00:17,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:17,633 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] [2022-11-19 07:00:17,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:00:17,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2024418628, now seen corresponding path program 1 times [2022-11-19 07:00:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:17,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291831699] [2022-11-19 07:00:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:17,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:00:18,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291831699] [2022-11-19 07:00:18,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291831699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361363295] [2022-11-19 07:00:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:18,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:18,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:18,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:18,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:00:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:00:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:00:18,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361363295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:18,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:18,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:00:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768994254] [2022-11-19 07:00:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:00:18,440 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) [2022-11-19 07:00:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:18,941 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2022-11-19 07:00:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:18,942 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 [2022-11-19 07:00:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:18,961 INFO L225 Difference]: With dead ends: 4272 [2022-11-19 07:00:18,962 INFO L226 Difference]: Without dead ends: 2220 [2022-11-19 07:00:18,977 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 [2022-11-19 07:00:18,978 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 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 [2022-11-19 07:00:18,978 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] [2022-11-19 07:00:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-11-19 07:00:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2022-11-19 07:00:19,156 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) [2022-11-19 07:00:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2022-11-19 07:00:19,171 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2022-11-19 07:00:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:19,171 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2022-11-19 07:00:19,172 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) [2022-11-19 07:00:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2022-11-19 07:00:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 07:00:19,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:19,179 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] [2022-11-19 07:00:19,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:19,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:19,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash -309415756, now seen corresponding path program 1 times [2022-11-19 07:00:19,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507493351] [2022-11-19 07:00:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:19,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-19 07:00:19,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507493351] [2022-11-19 07:00:19,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507493351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878764100] [2022-11-19 07:00:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:19,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:00:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:00:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:00:19,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878764100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:19,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:19,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:00:19,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953205650] [2022-11-19 07:00:19,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:19,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:19,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:00:19,999 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) [2022-11-19 07:00:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:20,458 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2022-11-19 07:00:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:20,462 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 [2022-11-19 07:00:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:20,478 INFO L225 Difference]: With dead ends: 4584 [2022-11-19 07:00:20,478 INFO L226 Difference]: Without dead ends: 2376 [2022-11-19 07:00:20,490 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 [2022-11-19 07:00:20,491 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:20,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:00:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-11-19 07:00:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2022-11-19 07:00:20,625 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) [2022-11-19 07:00:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2022-11-19 07:00:20,639 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2022-11-19 07:00:20,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:20,641 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2022-11-19 07:00:20,641 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) [2022-11-19 07:00:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2022-11-19 07:00:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:00:20,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:20,648 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] [2022-11-19 07:00:20,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:00:20,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 157259863, now seen corresponding path program 1 times [2022-11-19 07:00:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:20,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309283490] [2022-11-19 07:00:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 07:00:21,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309283490] [2022-11-19 07:00:21,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309283490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090840208] [2022-11-19 07:00:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:21,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:21,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:00:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:00:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:00:21,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090840208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:21,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:21,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:00:21,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068510756] [2022-11-19 07:00:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:21,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:21,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:00:21,531 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) [2022-11-19 07:00:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:21,951 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2022-11-19 07:00:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:21,952 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 [2022-11-19 07:00:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:21,970 INFO L225 Difference]: With dead ends: 4896 [2022-11-19 07:00:21,970 INFO L226 Difference]: Without dead ends: 2532 [2022-11-19 07:00:21,983 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 [2022-11-19 07:00:21,984 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 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 [2022-11-19 07:00:21,984 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] [2022-11-19 07:00:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-11-19 07:00:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2022-11-19 07:00:22,138 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) [2022-11-19 07:00:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2022-11-19 07:00:22,152 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2022-11-19 07:00:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:22,153 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2022-11-19 07:00:22,154 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) [2022-11-19 07:00:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2022-11-19 07:00:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:00:22,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:22,163 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] [2022-11-19 07:00:22,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:22,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:22,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1629096711, now seen corresponding path program 1 times [2022-11-19 07:00:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525422554] [2022-11-19 07:00:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 07:00:22,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:22,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525422554] [2022-11-19 07:00:22,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525422554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:22,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:22,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:00:22,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428567797] [2022-11-19 07:00:22,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:22,611 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) [2022-11-19 07:00:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:23,038 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2022-11-19 07:00:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:23,039 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 [2022-11-19 07:00:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:23,058 INFO L225 Difference]: With dead ends: 5220 [2022-11-19 07:00:23,058 INFO L226 Difference]: Without dead ends: 2668 [2022-11-19 07:00:23,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:00:23,073 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 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 [2022-11-19 07:00:23,074 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] [2022-11-19 07:00:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-11-19 07:00:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2022-11-19 07:00:23,238 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) [2022-11-19 07:00:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2022-11-19 07:00:23,253 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2022-11-19 07:00:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:23,253 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2022-11-19 07:00:23,254 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) [2022-11-19 07:00:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2022-11-19 07:00:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:00:23,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:23,260 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] [2022-11-19 07:00:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:00:23,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1638086922, now seen corresponding path program 1 times [2022-11-19 07:00:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:23,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627670855] [2022-11-19 07:00:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 07:00:23,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:23,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627670855] [2022-11-19 07:00:23,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627670855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:23,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:23,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:00:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102576939] [2022-11-19 07:00:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:00:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:23,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:00:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:00:23,743 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) [2022-11-19 07:00:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:28,063 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2022-11-19 07:00:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:00:28,064 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 [2022-11-19 07:00:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:28,099 INFO L225 Difference]: With dead ends: 6865 [2022-11-19 07:00:28,100 INFO L226 Difference]: Without dead ends: 3844 [2022-11-19 07:00:28,117 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 [2022-11-19 07:00:28,117 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1673 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:28,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 2027 Invalid, 5454 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [884 Valid, 4570 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 07:00:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-11-19 07:00:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2022-11-19 07:00:28,416 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) [2022-11-19 07:00:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2022-11-19 07:00:28,436 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2022-11-19 07:00:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:28,437 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2022-11-19 07:00:28,437 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) [2022-11-19 07:00:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2022-11-19 07:00:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 07:00:28,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:28,443 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] [2022-11-19 07:00:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:00:28,444 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -449202972, now seen corresponding path program 1 times [2022-11-19 07:00:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47201509] [2022-11-19 07:00:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:00:32,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47201509] [2022-11-19 07:00:32,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47201509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914547510] [2022-11-19 07:00:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:32,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:32,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a22f8e69-4213-4140-97c4-cc05b459fbdc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:00:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:00:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:00:35,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:29,055 WARN L233 SmtUtils]: Spent 49.82s 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) [2022-11-19 07:02:19,860 WARN L233 SmtUtils]: Spent 49.25s 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) [2022-11-19 07:02:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 07:02:21,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914547510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193601682] [2022-11-19 07:02:21,839 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-11-19 07:02:21,839 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:21,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:02:21,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:02:21,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:02:24,580 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-19 07:02:32,770 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-19 07:02:49,293 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 120 for LOIs [2022-11-19 07:02:49,798 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 511 for LOIs [2022-11-19 07:02:50,089 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 508 for LOIs [2022-11-19 07:02:51,973 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 461 for LOIs [2022-11-19 07:02:52,081 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 431 for LOIs [2022-11-19 07:02:52,144 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-19 07:02:55,352 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-19 07:02:55,943 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-19 07:02:56,077 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 444 for LOIs [2022-11-19 07:02:57,112 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 45 for LOIs [2022-11-19 07:02:57,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:27,086 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:03:35,322 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:03:45,485 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:05,869 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 511 DAG size of output: 449 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:16,250 WARN L233 SmtUtils]: Spent 9.41s on a formula simplification. DAG size of input: 515 DAG size of output: 454 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:23,052 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:29,798 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:47,330 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:54,157 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:00,991 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 613 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:35,302 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 615 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:42,241 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:49,300 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 624 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:04,457 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 622 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:14,545 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:22,128 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 629 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:29,808 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 630 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:40,626 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 635 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:48,124 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 631 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:57,233 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 637 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:04,836 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 633 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:13,976 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 639 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:21,670 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 635 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:30,850 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 641 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:38,503 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 637 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:47,941 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 643 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:55,717 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 639 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:10,801 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 625 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:18,100 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 649 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:25,717 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 552 DAG size of output: 473 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:09:07,795 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 [2022-11-19 07:09:07,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:09:07,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:09:07,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 20, 16] total 72 [2022-11-19 07:09:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608451473] [2022-11-19 07:09:07,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:09:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-19 07:09:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-19 07:09:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=18069, Unknown=0, NotChecked=0, Total=19460 [2022-11-19 07:09:07,806 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)