./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba --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 da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- 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-b5237d8 [2022-11-22 02:06:47,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:06:47,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:06:47,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:06:47,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:06:47,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:06:47,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:06:47,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:06:47,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:06:47,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:06:47,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:06:47,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:06:47,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:06:47,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:06:47,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:06:47,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:06:47,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:06:47,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:06:47,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:06:47,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:06:47,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:06:47,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:06:47,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:06:47,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:06:47,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:06:47,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:06:47,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:06:47,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:06:47,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:06:47,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:06:47,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:06:47,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:06:47,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:06:47,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:06:47,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:06:47,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:06:47,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:06:47,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:06:47,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:06:47,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:06:47,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:06:47,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:06:47,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:06:47,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:06:47,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:06:47,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:06:47,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:06:47,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:06:47,829 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:06:47,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:06:47,830 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:06:47,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:06:47,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:06:47,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:06:47,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:06:47,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:06:47,831 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:06:47,832 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:06:47,832 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:06:47,832 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:06:47,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:06:47,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:06:47,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:06:47,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:06:47,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:06:47,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:06:47,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:06:47,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:06:47,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:06:47,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:06:47,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:06:47,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:06:47,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:06:47,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:06:47,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:06:47,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:06:47,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:06:47,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:06:47,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:06:47,838 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:06:47,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:06:47,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:06:47,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:06:47,839 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_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2022-11-22 02:06:48,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:06:48,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:06:48,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:06:48,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:06:48,228 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:06:48,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-22 02:06:51,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:06:52,185 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:06:52,186 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-22 02:06:52,219 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/data/5b41af9df/d8595715b7ba4fa4bfdd14a4e39742d9/FLAG6bf5a2cd8 [2022-11-22 02:06:52,243 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/data/5b41af9df/d8595715b7ba4fa4bfdd14a4e39742d9 [2022-11-22 02:06:52,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:06:52,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:06:52,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:06:52,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:06:52,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:06:52,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:06:52" (1/1) ... [2022-11-22 02:06:52,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d8a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:52, skipping insertion in model container [2022-11-22 02:06:52,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:06:52" (1/1) ... [2022-11-22 02:06:52,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:06:52,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:06:52,855 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-22 02:06:52,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:06:53,021 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:06:53,151 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-22 02:06:53,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:06:53,227 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:06:53,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53 WrapperNode [2022-11-22 02:06:53,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:06:53,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:06:53,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:06:53,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:06:53,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,350 INFO L138 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1104 [2022-11-22 02:06:53,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:06:53,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:06:53,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:06:53,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:06:53,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:06:53,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:06:53,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:06:53,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:06:53,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (1/1) ... [2022-11-22 02:06:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:06:53,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:53,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:06:53,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:06:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:06:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:06:53,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:06:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:06:53,562 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:06:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:06:53,562 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:06:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 02:06:53,562 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 02:06:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:06:53,563 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:06:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 02:06:53,563 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 02:06:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:06:53,564 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:06:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:06:53,564 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:06:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:06:53,564 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:06:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 02:06:53,565 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 02:06:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:06:53,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:06:53,566 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:06:53,567 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:06:53,567 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:06:53,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:06:53,568 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:06:53,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:06:53,568 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:06:53,570 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:06:53,570 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:06:53,571 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:06:53,571 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:06:53,571 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:06:53,571 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:06:53,572 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:06:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:06:53,572 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:06:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:06:53,572 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:06:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:06:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:06:53,573 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:06:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:06:53,574 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:06:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:06:53,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:06:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:06:53,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:06:53,576 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:06:53,576 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:06:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 02:06:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 02:06:53,845 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:06:53,861 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:06:55,406 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:06:56,363 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:06:56,363 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:06:56,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:06:56 BoogieIcfgContainer [2022-11-22 02:06:56,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:06:56,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:06:56,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:06:56,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:06:56,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:06:52" (1/3) ... [2022-11-22 02:06:56,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67addebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:06:56, skipping insertion in model container [2022-11-22 02:06:56,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:53" (2/3) ... [2022-11-22 02:06:56,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67addebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:06:56, skipping insertion in model container [2022-11-22 02:06:56,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:06:56" (3/3) ... [2022-11-22 02:06:56,393 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2022-11-22 02:06:56,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:06:56,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:06:56,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:06:56,524 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;@4c5e841f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:06:56,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:06:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-22 02:06:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:06:56,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:56,546 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] [2022-11-22 02:06:56,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1751061673, now seen corresponding path program 1 times [2022-11-22 02:06:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:56,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309716577] [2022-11-22 02:06:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:06:57,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309716577] [2022-11-22 02:06:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309716577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:57,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:06:57,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:06:57,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501952133] [2022-11-22 02:06:57,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:06:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:06:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:06:57,375 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) 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) [2022-11-22 02:06:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:57,952 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-11-22 02:06:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:06:57,956 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 [2022-11-22 02:06:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:57,982 INFO L225 Difference]: With dead ends: 1074 [2022-11-22 02:06:57,986 INFO L226 Difference]: Without dead ends: 709 [2022-11-22 02:06:57,996 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 [2022-11-22 02:06:58,006 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 546 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:58,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1197 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:06:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-22 02:06:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-11-22 02:06:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-11-22 02:06:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-11-22 02:06:58,254 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-11-22 02:06:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:58,259 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-11-22 02:06:58,260 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) [2022-11-22 02:06:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-11-22 02:06:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:06:58,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:58,280 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] [2022-11-22 02:06:58,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:06:58,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash 26132879, now seen corresponding path program 1 times [2022-11-22 02:06:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:58,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298792456] [2022-11-22 02:06:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:06:58,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:58,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298792456] [2022-11-22 02:06:58,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298792456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:58,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:06:58,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:06:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206914490] [2022-11-22 02:06:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:58,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:06:58,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:58,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:06:58,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:06:58,984 INFO L87 Difference]: Start difference. First operand 673 states and 1063 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) [2022-11-22 02:07:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:02,410 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-11-22 02:07:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:07:02,411 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 [2022-11-22 02:07:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:02,425 INFO L225 Difference]: With dead ends: 2177 [2022-11-22 02:07:02,426 INFO L226 Difference]: Without dead ends: 1516 [2022-11-22 02:07:02,431 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 [2022-11-22 02:07:02,433 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1094 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:02,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 1269 Invalid, 3130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [455 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:07:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-22 02:07:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-11-22 02:07:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-11-22 02:07:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-11-22 02:07:02,595 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-11-22 02:07:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:02,596 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-11-22 02:07:02,597 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) [2022-11-22 02:07:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-11-22 02:07:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-22 02:07:02,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:02,603 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] [2022-11-22 02:07:02,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:07:02,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash 826960521, now seen corresponding path program 1 times [2022-11-22 02:07:02,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:02,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515357122] [2022-11-22 02:07:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:02,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:07:03,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515357122] [2022-11-22 02:07:03,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515357122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885219753] [2022-11-22 02:07:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:03,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:03,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:03,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:07:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:07:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:07:03,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:03,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885219753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:03,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:03,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-11-22 02:07:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538447569] [2022-11-22 02:07:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:03,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:07:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:07:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:07:03,648 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:07:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:04,505 INFO L93 Difference]: Finished difference Result 3013 states and 4786 transitions. [2022-11-22 02:07:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:07:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2022-11-22 02:07:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:04,520 INFO L225 Difference]: With dead ends: 3013 [2022-11-22 02:07:04,521 INFO L226 Difference]: Without dead ends: 1650 [2022-11-22 02:07:04,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:07:04,538 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 376 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:04,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2483 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-22 02:07:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1600. [2022-11-22 02:07:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1079 states have (on average 1.5199258572752548) internal successors, (1640), 1129 states have internal predecessors, (1640), 397 states have call successors, (397), 121 states have call predecessors, (397), 123 states have return successors, (455), 376 states have call predecessors, (455), 391 states have call successors, (455) [2022-11-22 02:07:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2492 transitions. [2022-11-22 02:07:04,730 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2492 transitions. Word has length 90 [2022-11-22 02:07:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:04,731 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 2492 transitions. [2022-11-22 02:07:04,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:07:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2492 transitions. [2022-11-22 02:07:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 02:07:04,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:04,735 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] [2022-11-22 02:07:04,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:04,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:04,945 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1058882386, now seen corresponding path program 1 times [2022-11-22 02:07:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270713338] [2022-11-22 02:07:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:04,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:07:05,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270713338] [2022-11-22 02:07:05,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270713338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:05,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:05,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:07:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115489282] [2022-11-22 02:07:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:05,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:07:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:07:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:07:05,568 INFO L87 Difference]: Start difference. First operand 1600 states and 2492 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) [2022-11-22 02:07:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:09,328 INFO L93 Difference]: Finished difference Result 1978 states and 3164 transitions. [2022-11-22 02:07:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:07:09,329 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 [2022-11-22 02:07:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:09,357 INFO L225 Difference]: With dead ends: 1978 [2022-11-22 02:07:09,357 INFO L226 Difference]: Without dead ends: 1976 [2022-11-22 02:07:09,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:07:09,361 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1385 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 3982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:09,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2013 Invalid, 3982 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [814 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:07:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-22 02:07:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1780. [2022-11-22 02:07:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2022-11-22 02:07:09,581 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 91 [2022-11-22 02:07:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:09,582 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2022-11-22 02:07:09,582 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) [2022-11-22 02:07:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2022-11-22 02:07:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-22 02:07:09,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:09,589 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] [2022-11-22 02:07:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:07:09,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -158760090, now seen corresponding path program 1 times [2022-11-22 02:07:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817148520] [2022-11-22 02:07:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-22 02:07:09,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:09,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817148520] [2022-11-22 02:07:09,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817148520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:09,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:09,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:09,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375458414] [2022-11-22 02:07:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:09,835 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 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) [2022-11-22 02:07:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:10,190 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2022-11-22 02:07:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:10,190 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 [2022-11-22 02:07:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:10,206 INFO L225 Difference]: With dead ends: 3646 [2022-11-22 02:07:10,206 INFO L226 Difference]: Without dead ends: 1878 [2022-11-22 02:07:10,220 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 [2022-11-22 02:07:10,221 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 30 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:10,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1570 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-22 02:07:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2022-11-22 02:07:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2022-11-22 02:07:10,395 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2022-11-22 02:07:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:10,396 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2022-11-22 02:07:10,396 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) [2022-11-22 02:07:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2022-11-22 02:07:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:07:10,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:10,402 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] [2022-11-22 02:07:10,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:07:10,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash -125520464, now seen corresponding path program 1 times [2022-11-22 02:07:10,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109204876] [2022-11-22 02:07:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-22 02:07:10,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109204876] [2022-11-22 02:07:10,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109204876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146306556] [2022-11-22 02:07:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:10,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:10,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:10,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:07:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:07:11,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146306556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:11,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:11,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 02:07:11,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775034022] [2022-11-22 02:07:11,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:11,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:11,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:11,310 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:07:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:11,816 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2022-11-22 02:07:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:11,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 125 [2022-11-22 02:07:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:11,841 INFO L225 Difference]: With dead ends: 3728 [2022-11-22 02:07:11,842 INFO L226 Difference]: Without dead ends: 1948 [2022-11-22 02:07:11,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:07:11,856 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:11,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:07:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-11-22 02:07:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2022-11-22 02:07:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-11-22 02:07:12,045 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2022-11-22 02:07:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:12,046 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-11-22 02:07:12,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:07:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-11-22 02:07:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-22 02:07:12,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:12,054 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] [2022-11-22 02:07:12,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:12,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 330063092, now seen corresponding path program 1 times [2022-11-22 02:07:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:12,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309405887] [2022-11-22 02:07:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 02:07:12,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309405887] [2022-11-22 02:07:12,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309405887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068359533] [2022-11-22 02:07:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:12,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:12,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:12,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:12,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:07:13,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:13,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068359533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:13,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:13,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:07:13,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041086733] [2022-11-22 02:07:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:13,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:13,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:13,012 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 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) [2022-11-22 02:07:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:13,525 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-11-22 02:07:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:13,526 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 130 [2022-11-22 02:07:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:13,543 INFO L225 Difference]: With dead ends: 4040 [2022-11-22 02:07:13,543 INFO L226 Difference]: Without dead ends: 2104 [2022-11-22 02:07:13,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:13,559 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:13,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:07:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-11-22 02:07:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-11-22 02:07:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-11-22 02:07:13,813 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-11-22 02:07:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:13,814 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-11-22 02:07:13,814 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) [2022-11-22 02:07:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-11-22 02:07:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 02:07:13,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:13,823 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] [2022-11-22 02:07:13,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:14,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:14,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash -910319452, now seen corresponding path program 1 times [2022-11-22 02:07:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575556123] [2022-11-22 02:07:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:14,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-22 02:07:14,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575556123] [2022-11-22 02:07:14,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575556123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104602164] [2022-11-22 02:07:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:14,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:14,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:14,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:14,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:07:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:07:14,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104602164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:14,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:07:14,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027864180] [2022-11-22 02:07:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:14,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:14,768 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 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) [2022-11-22 02:07:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:15,286 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-11-22 02:07:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:15,287 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 [2022-11-22 02:07:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:15,305 INFO L225 Difference]: With dead ends: 4352 [2022-11-22 02:07:15,305 INFO L226 Difference]: Without dead ends: 2260 [2022-11-22 02:07:15,320 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 [2022-11-22 02:07:15,321 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:15,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:07:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-22 02:07:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-22 02:07:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-11-22 02:07:15,560 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-11-22 02:07:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:15,561 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-11-22 02:07:15,562 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) [2022-11-22 02:07:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-11-22 02:07:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 02:07:15,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:15,569 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] [2022-11-22 02:07:15,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:15,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:15,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1694048112, now seen corresponding path program 1 times [2022-11-22 02:07:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:15,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310593528] [2022-11-22 02:07:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 02:07:16,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310593528] [2022-11-22 02:07:16,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310593528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098880804] [2022-11-22 02:07:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:16,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:07:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:07:16,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:16,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098880804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:16,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:16,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:07:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706250426] [2022-11-22 02:07:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:16,539 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 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) [2022-11-22 02:07:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:17,066 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-11-22 02:07:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:17,068 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 137 [2022-11-22 02:07:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:17,085 INFO L225 Difference]: With dead ends: 4664 [2022-11-22 02:07:17,085 INFO L226 Difference]: Without dead ends: 2416 [2022-11-22 02:07:17,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:17,100 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:17,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:07:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-22 02:07:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-11-22 02:07:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-22 02:07:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-11-22 02:07:17,300 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-11-22 02:07:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:17,301 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-11-22 02:07:17,302 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) [2022-11-22 02:07:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-11-22 02:07:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 02:07:17,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:17,309 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:17,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:17,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -805690754, now seen corresponding path program 1 times [2022-11-22 02:07:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547954928] [2022-11-22 02:07:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-22 02:07:17,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547954928] [2022-11-22 02:07:17,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547954928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:17,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825056089] [2022-11-22 02:07:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:17,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:17,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:17,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:07:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 02:07:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-22 02:07:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:22,331 WARN L233 SmtUtils]: Spent 57.64s 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) [2022-11-22 02:09:22,679 WARN L233 SmtUtils]: Spent 58.35s 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) [2022-11-22 02:09:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-22 02:09:24,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825056089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485914977] [2022-11-22 02:09:24,809 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-11-22 02:09:24,810 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:09:24,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:09:24,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:09:24,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:09:28,408 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-22 02:09:35,036 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-22 02:10:06,172 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-11-22 02:10:06,447 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 444 for LOIs [2022-11-22 02:10:07,313 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 508 for LOIs [2022-11-22 02:10:07,553 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2022-11-22 02:10:08,932 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-11-22 02:10:08,943 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 120 for LOIs [2022-11-22 02:10:08,977 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 38 for LOIs [2022-11-22 02:10:08,982 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-22 02:10:12,751 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-22 02:10:13,425 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-22 02:10:13,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:10:19,487 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 520 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:10:32,316 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 551 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:10:41,648 WARN L233 SmtUtils]: Spent 8.85s 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) [2022-11-22 02:10:50,724 WARN L233 SmtUtils]: Spent 8.58s 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) [2022-11-22 02:11:01,812 WARN L233 SmtUtils]: Spent 6.56s 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) [2022-11-22 02:11:21,538 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:11:28,713 WARN L233 SmtUtils]: Spent 6.57s 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) [2022-11-22 02:11:36,054 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 577 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:11:45,087 WARN L233 SmtUtils]: Spent 6.64s 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) [2022-11-22 02:11:52,356 WARN L233 SmtUtils]: Spent 6.57s 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) [2022-11-22 02:11:59,647 WARN L233 SmtUtils]: Spent 6.58s 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) [2022-11-22 02:13:02,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64666#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= |timeShift_~tmp~13#1| 1) (= |old(~blocked~0)| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 1 |timeShift_~tmp~13#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~persons_3~0 0) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (= |old(~floorButtons_4~0)| 0) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (= |old(~persons_0~0)| 0) (= ~doorState~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-22 02:13:02,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:13:02,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:13:02,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 35 [2022-11-22 02:13:02,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500808171] [2022-11-22 02:13:02,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:13:02,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 02:13:02,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 02:13:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=8567, Unknown=0, NotChecked=0, Total=9506 [2022-11-22 02:13:02,247 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-22 02:13:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:42,466 INFO L93 Difference]: Finished difference Result 10515 states and 18062 transitions. [2022-11-22 02:13:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-22 02:13:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) Word has length 139 [2022-11-22 02:13:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:42,546 INFO L225 Difference]: With dead ends: 10515 [2022-11-22 02:13:42,546 INFO L226 Difference]: Without dead ends: 6534 [2022-11-22 02:13:42,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 329 SyntacticMatches, 22 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15892 ImplicationChecksByTransitivity, 176.2s TimeCoverageRelationStatistics Valid=3351, Invalid=36449, Unknown=0, NotChecked=0, Total=39800 [2022-11-22 02:13:42,595 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 7536 mSDsluCounter, 9477 mSDsCounter, 0 mSdLazyCounter, 32543 mSolverCounterSat, 5826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7583 SdHoareTripleChecker+Valid, 10234 SdHoareTripleChecker+Invalid, 38369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 5826 IncrementalHoareTripleChecker+Valid, 32543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:42,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7583 Valid, 10234 Invalid, 38369 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [5826 Valid, 32543 Invalid, 0 Unknown, 0 Unchecked, 31.8s Time] [2022-11-22 02:13:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-11-22 02:13:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5871. [2022-11-22 02:13:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4170 states have (on average 1.5553956834532374) internal successors, (6486), 4425 states have internal predecessors, (6486), 1281 states have call successors, (1281), 369 states have call predecessors, (1281), 419 states have return successors, (1648), 1180 states have call predecessors, (1648), 1275 states have call successors, (1648) [2022-11-22 02:13:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9415 transitions. [2022-11-22 02:13:43,490 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9415 transitions. Word has length 139 [2022-11-22 02:13:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:43,490 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 9415 transitions. [2022-11-22 02:13:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-22 02:13:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9415 transitions. [2022-11-22 02:13:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:13:43,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:43,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:43,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:13:43,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:43,720 INFO L85 PathProgramCache]: Analyzing trace with hash 440481421, now seen corresponding path program 1 times [2022-11-22 02:13:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:43,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213174034] [2022-11-22 02:13:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-22 02:13:44,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213174034] [2022-11-22 02:13:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213174034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045659909] [2022-11-22 02:13:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:44,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:44,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:44,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:13:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:13:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-22 02:13:45,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:45,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045659909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:45,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:45,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-22 02:13:45,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384818203] [2022-11-22 02:13:45,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:45,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:13:45,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:13:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:13:45,465 INFO L87 Difference]: Start difference. First operand 5871 states and 9415 transitions. Second operand has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-22 02:13:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:52,270 INFO L93 Difference]: Finished difference Result 13797 states and 22324 transitions. [2022-11-22 02:13:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:13:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 144 [2022-11-22 02:13:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:52,330 INFO L225 Difference]: With dead ends: 13797 [2022-11-22 02:13:52,331 INFO L226 Difference]: Without dead ends: 7940 [2022-11-22 02:13:52,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:13:52,365 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 2085 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 5211 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 6402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 5211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:52,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 1611 Invalid, 6402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 5211 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-22 02:13:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2022-11-22 02:13:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 7626. [2022-11-22 02:13:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 5532 states have (on average 1.546999276934201) internal successors, (8558), 5814 states have internal predecessors, (8558), 1529 states have call successors, (1529), 507 states have call predecessors, (1529), 564 states have return successors, (1957), 1415 states have call predecessors, (1957), 1521 states have call successors, (1957) [2022-11-22 02:13:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 12044 transitions. [2022-11-22 02:13:53,458 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 12044 transitions. Word has length 144 [2022-11-22 02:13:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:53,459 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 12044 transitions. [2022-11-22 02:13:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-22 02:13:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 12044 transitions. [2022-11-22 02:13:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-22 02:13:53,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:53,491 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:53,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:13:53,701 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1037102116, now seen corresponding path program 1 times [2022-11-22 02:13:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173072894] [2022-11-22 02:13:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 56 proven. 117 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2022-11-22 02:13:55,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:55,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173072894] [2022-11-22 02:13:55,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173072894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840504562] [2022-11-22 02:13:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:55,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:55,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:13:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 4507 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:13:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2022-11-22 02:13:57,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840504562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:57,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-11-22 02:13:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141456357] [2022-11-22 02:13:57,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:13:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:13:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:13:57,736 INFO L87 Difference]: Start difference. First operand 7626 states and 12044 transitions. Second operand has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-22 02:14:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:02,057 INFO L93 Difference]: Finished difference Result 12968 states and 20387 transitions. [2022-11-22 02:14:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:14:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 429 [2022-11-22 02:14:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:02,110 INFO L225 Difference]: With dead ends: 12968 [2022-11-22 02:14:02,110 INFO L226 Difference]: Without dead ends: 6680 [2022-11-22 02:14:02,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:14:02,132 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1164 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:02,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 3365 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:14:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-11-22 02:14:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6542. [2022-11-22 02:14:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6542 states, 4681 states have (on average 1.5088656270027772) internal successors, (7063), 4908 states have internal predecessors, (7063), 1356 states have call successors, (1356), 477 states have call predecessors, (1356), 504 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-22 02:14:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 10121 transitions. [2022-11-22 02:14:02,931 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 10121 transitions. Word has length 429 [2022-11-22 02:14:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:02,935 INFO L495 AbstractCegarLoop]: Abstraction has 6542 states and 10121 transitions. [2022-11-22 02:14:02,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-22 02:14:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 10121 transitions. [2022-11-22 02:14:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-22 02:14:02,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:02,958 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:02,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:03,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1451935026, now seen corresponding path program 1 times [2022-11-22 02:14:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437458341] [2022-11-22 02:14:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-22 02:14:03,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437458341] [2022-11-22 02:14:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437458341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207878252] [2022-11-22 02:14:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:03,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:03,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:03,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:14:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:14:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-22 02:14:04,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:14:04,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207878252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:04,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:14:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 02:14:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801096632] [2022-11-22 02:14:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:14:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:14:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:14:04,525 INFO L87 Difference]: Start difference. First operand 6542 states and 10121 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-22 02:14:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:05,406 INFO L93 Difference]: Finished difference Result 13374 states and 20853 transitions. [2022-11-22 02:14:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:14:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 225 [2022-11-22 02:14:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:05,447 INFO L225 Difference]: With dead ends: 13374 [2022-11-22 02:14:05,447 INFO L226 Difference]: Without dead ends: 6846 [2022-11-22 02:14:05,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:14:05,473 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1359 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:14:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2022-11-22 02:14:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6846. [2022-11-22 02:14:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 4973 states have (on average 1.52604061934446) internal successors, (7589), 5202 states have internal predecessors, (7589), 1356 states have call successors, (1356), 487 states have call predecessors, (1356), 516 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-22 02:14:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 10647 transitions. [2022-11-22 02:14:06,288 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 10647 transitions. Word has length 225 [2022-11-22 02:14:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:06,289 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 10647 transitions. [2022-11-22 02:14:06,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-22 02:14:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 10647 transitions. [2022-11-22 02:14:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-22 02:14:06,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:06,314 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:06,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:06,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:06,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1782348588, now seen corresponding path program 1 times [2022-11-22 02:14:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:06,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177186941] [2022-11-22 02:14:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-22 02:14:06,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177186941] [2022-11-22 02:14:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177186941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060959520] [2022-11-22 02:14:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:07,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:07,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:07,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:14:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 02:14:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-22 02:14:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-22 02:14:15,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060959520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:14:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876012536] [2022-11-22 02:14:15,915 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-11-22 02:14:15,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:15,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:15,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:15,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:25,796 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-11-22 02:14:26,293 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-11-22 02:14:27,111 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-11-22 02:14:29,577 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-22 02:14:30,095 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 34 for LOIs [2022-11-22 02:14:30,173 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 58 for LOIs [2022-11-22 02:14:30,182 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 59 for LOIs [2022-11-22 02:14:30,298 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-22 02:14:30,310 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 70 for LOIs [2022-11-22 02:14:30,607 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 56 for LOIs [2022-11-22 02:14:30,624 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 31 for LOIs [2022-11-22 02:14:30,626 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-22 02:14:34,901 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-11-22 02:14:34,913 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-11-22 02:14:34,929 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-11-22 02:14:37,652 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-11-22 02:14:48,771 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-11-22 02:14:49,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:55,280 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 520 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:15:07,346 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 645 DAG size of output: 582 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:15:15,856 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 685 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:15:24,756 WARN L233 SmtUtils]: Spent 8.55s 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) [2022-11-22 02:15:34,058 WARN L233 SmtUtils]: Spent 8.93s 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) [2022-11-22 02:15:51,391 WARN L233 SmtUtils]: Spent 16.72s on a formula simplification. DAG size of input: 792 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:16:12,123 WARN L233 SmtUtils]: Spent 20.00s on a formula simplification. DAG size of input: 803 DAG size of output: 784 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:17:24,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172631#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1| 0)) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |timeShift_~tmp~13#1| 2147483647) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (<= ~blocked~0 1) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 ~blocked~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-22 02:17:24,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:17:24,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:17:24,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2022-11-22 02:17:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004833164] [2022-11-22 02:17:24,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:17:24,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:17:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12886, Unknown=0, NotChecked=0, Total=14042 [2022-11-22 02:17:24,315 INFO L87 Difference]: Start difference. First operand 6846 states and 10647 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-22 02:18:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:05,301 INFO L93 Difference]: Finished difference Result 35773 states and 57395 transitions. [2022-11-22 02:18:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-22 02:18:05,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) Word has length 226 [2022-11-22 02:18:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:05,521 INFO L225 Difference]: With dead ends: 35773 [2022-11-22 02:18:05,521 INFO L226 Difference]: Without dead ends: 27374 [2022-11-22 02:18:05,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 558 SyntacticMatches, 23 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14941 ImplicationChecksByTransitivity, 162.5s TimeCoverageRelationStatistics Valid=2585, Invalid=29635, Unknown=0, NotChecked=0, Total=32220 [2022-11-22 02:18:05,596 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 7082 mSDsluCounter, 6983 mSDsCounter, 0 mSdLazyCounter, 25856 mSolverCounterSat, 6746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7134 SdHoareTripleChecker+Valid, 8121 SdHoareTripleChecker+Invalid, 32602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 6746 IncrementalHoareTripleChecker+Valid, 25856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:05,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7134 Valid, 8121 Invalid, 32602 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [6746 Valid, 25856 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2022-11-22 02:18:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27374 states. [2022-11-22 02:18:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27374 to 21718. [2022-11-22 02:18:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21718 states, 15478 states have (on average 1.531787052590774) internal successors, (23709), 16371 states have internal predecessors, (23709), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-22 02:18:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21718 states to 21718 states and 34232 transitions. [2022-11-22 02:18:08,523 INFO L78 Accepts]: Start accepts. Automaton has 21718 states and 34232 transitions. Word has length 226 [2022-11-22 02:18:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:08,524 INFO L495 AbstractCegarLoop]: Abstraction has 21718 states and 34232 transitions. [2022-11-22 02:18:08,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-22 02:18:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21718 states and 34232 transitions. [2022-11-22 02:18:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-11-22 02:18:08,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:08,560 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:08,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:08,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:18:08,772 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash 564849650, now seen corresponding path program 1 times [2022-11-22 02:18:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:08,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486711768] [2022-11-22 02:18:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2022-11-22 02:18:09,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486711768] [2022-11-22 02:18:09,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486711768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692565777] [2022-11-22 02:18:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:09,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:09,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:10,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:18:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 3862 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:18:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2022-11-22 02:18:11,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692565777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:11,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:11,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-11-22 02:18:11,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319394939] [2022-11-22 02:18:11,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:11,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:18:11,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:18:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:18:11,605 INFO L87 Difference]: Start difference. First operand 21718 states and 34232 transitions. Second operand has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-22 02:18:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:17,436 INFO L93 Difference]: Finished difference Result 39795 states and 63141 transitions. [2022-11-22 02:18:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:18:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 357 [2022-11-22 02:18:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:17,586 INFO L225 Difference]: With dead ends: 39795 [2022-11-22 02:18:17,586 INFO L226 Difference]: Without dead ends: 21760 [2022-11-22 02:18:17,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:18:17,667 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1249 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 4047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:17,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 3348 Invalid, 4047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:18:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2022-11-22 02:18:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21190. [2022-11-22 02:18:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21190 states, 14950 states have (on average 1.5120401337792642) internal successors, (22605), 15843 states have internal predecessors, (22605), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-22 02:18:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 33128 transitions. [2022-11-22 02:18:20,726 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 33128 transitions. Word has length 357 [2022-11-22 02:18:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:20,728 INFO L495 AbstractCegarLoop]: Abstraction has 21190 states and 33128 transitions. [2022-11-22 02:18:20,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-22 02:18:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 33128 transitions. [2022-11-22 02:18:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-22 02:18:20,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:20,769 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:20,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:20,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:18:20,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash 732047706, now seen corresponding path program 1 times [2022-11-22 02:18:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021891934] [2022-11-22 02:18:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-22 02:18:21,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021891934] [2022-11-22 02:18:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021891934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445008718] [2022-11-22 02:18:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:21,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:21,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:18:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:18:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-22 02:18:23,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:23,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445008718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:23,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:23,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-11-22 02:18:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318014317] [2022-11-22 02:18:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:18:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:18:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:18:23,046 INFO L87 Difference]: Start difference. First operand 21190 states and 33128 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-22 02:18:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:29,425 INFO L93 Difference]: Finished difference Result 38739 states and 60933 transitions. [2022-11-22 02:18:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:18:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 281 [2022-11-22 02:18:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:29,555 INFO L225 Difference]: With dead ends: 38739 [2022-11-22 02:18:29,555 INFO L226 Difference]: Without dead ends: 21232 [2022-11-22 02:18:29,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:18:29,634 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1186 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:29,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 3336 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:18:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2022-11-22 02:18:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 20662. [2022-11-22 02:18:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 14422 states have (on average 1.4908473165996394) internal successors, (21501), 15315 states have internal predecessors, (21501), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-22 02:18:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 32024 transitions. [2022-11-22 02:18:32,157 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 32024 transitions. Word has length 281 [2022-11-22 02:18:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:32,158 INFO L495 AbstractCegarLoop]: Abstraction has 20662 states and 32024 transitions. [2022-11-22 02:18:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-22 02:18:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 32024 transitions. [2022-11-22 02:18:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-22 02:18:32,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:32,184 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:32,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:32,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:32,396 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1922400587, now seen corresponding path program 1 times [2022-11-22 02:18:32,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:32,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771590118] [2022-11-22 02:18:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-22 02:18:33,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771590118] [2022-11-22 02:18:33,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771590118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174522620] [2022-11-22 02:18:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:33,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:33,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:18:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:33,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:18:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-22 02:18:34,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:34,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174522620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:34,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:34,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-11-22 02:18:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388343129] [2022-11-22 02:18:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:18:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:18:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:18:34,323 INFO L87 Difference]: Start difference. First operand 20662 states and 32024 transitions. Second operand has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-22 02:18:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:41,321 INFO L93 Difference]: Finished difference Result 37683 states and 58725 transitions. [2022-11-22 02:18:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:18:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 283 [2022-11-22 02:18:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:41,451 INFO L225 Difference]: With dead ends: 37683 [2022-11-22 02:18:41,451 INFO L226 Difference]: Without dead ends: 20704 [2022-11-22 02:18:41,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:18:41,532 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1171 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:41,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 3324 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:18:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2022-11-22 02:18:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20134. [2022-11-22 02:18:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20134 states, 13894 states have (on average 1.468043759896358) internal successors, (20397), 14787 states have internal predecessors, (20397), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-22 02:18:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20134 states to 20134 states and 30920 transitions. [2022-11-22 02:18:44,570 INFO L78 Accepts]: Start accepts. Automaton has 20134 states and 30920 transitions. Word has length 283 [2022-11-22 02:18:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:44,571 INFO L495 AbstractCegarLoop]: Abstraction has 20134 states and 30920 transitions. [2022-11-22 02:18:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-22 02:18:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20134 states and 30920 transitions. [2022-11-22 02:18:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-22 02:18:44,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:44,615 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:44,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 02:18:44,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:18:44,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1622990022, now seen corresponding path program 1 times [2022-11-22 02:18:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:44,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984122095] [2022-11-22 02:18:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-11-22 02:18:46,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984122095] [2022-11-22 02:18:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984122095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106485412] [2022-11-22 02:18:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:46,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:46,263 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:46,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:18:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 3868 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:18:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-22 02:18:47,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:47,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106485412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:47,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:47,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-11-22 02:18:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754630015] [2022-11-22 02:18:47,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:47,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:18:47,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:18:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:18:47,681 INFO L87 Difference]: Start difference. First operand 20134 states and 30920 transitions. Second operand has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-22 02:18:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:53,937 INFO L93 Difference]: Finished difference Result 38180 states and 59430 transitions. [2022-11-22 02:18:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:18:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 366 [2022-11-22 02:18:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:54,062 INFO L225 Difference]: With dead ends: 38180 [2022-11-22 02:18:54,063 INFO L226 Difference]: Without dead ends: 20640 [2022-11-22 02:18:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:18:54,151 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 1113 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 3322 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 02:18:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20640 states. [2022-11-22 02:18:56,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20640 to 20070. [2022-11-22 02:18:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20070 states, 13840 states have (on average 1.4604768786127167) internal successors, (20213), 14733 states have internal predecessors, (20213), 4692 states have call successors, (4692), 1423 states have call predecessors, (4692), 1537 states have return successors, (5811), 4161 states have call predecessors, (5811), 4666 states have call successors, (5811) [2022-11-22 02:18:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20070 states to 20070 states and 30716 transitions. [2022-11-22 02:18:56,666 INFO L78 Accepts]: Start accepts. Automaton has 20070 states and 30716 transitions. Word has length 366 [2022-11-22 02:18:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:56,667 INFO L495 AbstractCegarLoop]: Abstraction has 20070 states and 30716 transitions. [2022-11-22 02:18:56,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-22 02:18:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 20070 states and 30716 transitions. [2022-11-22 02:18:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-22 02:18:56,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:56,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:56,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 02:18:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:18:56,908 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2053678225, now seen corresponding path program 1 times [2022-11-22 02:18:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:56,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884066856] [2022-11-22 02:18:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-22 02:19:00,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884066856] [2022-11-22 02:19:00,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884066856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905809869] [2022-11-22 02:19:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:00,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:00,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:19:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:19:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-22 02:19:02,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:19:02,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905809869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:02,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:19:02,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [25] total 36 [2022-11-22 02:19:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009185776] [2022-11-22 02:19:02,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:02,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:19:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:19:02,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:19:02,563 INFO L87 Difference]: Start difference. First operand 20070 states and 30716 transitions. Second operand has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-22 02:19:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:14,509 INFO L93 Difference]: Finished difference Result 31323 states and 48564 transitions. [2022-11-22 02:19:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:19:14,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 235 [2022-11-22 02:19:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:14,640 INFO L225 Difference]: With dead ends: 31323 [2022-11-22 02:19:14,640 INFO L226 Difference]: Without dead ends: 31017 [2022-11-22 02:19:14,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:19:14,663 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 3120 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 5434 mSolverCounterSat, 1565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3281 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 6999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1565 IncrementalHoareTripleChecker+Valid, 5434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:14,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3281 Valid, 2016 Invalid, 6999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1565 Valid, 5434 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-22 02:19:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2022-11-22 02:19:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 28895. [2022-11-22 02:19:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28895 states, 19847 states have (on average 1.457348717690331) internal successors, (28924), 21079 states have internal predecessors, (28924), 6876 states have call successors, (6876), 1973 states have call predecessors, (6876), 2171 states have return successors, (8727), 6136 states have call predecessors, (8727), 6842 states have call successors, (8727) [2022-11-22 02:19:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28895 states to 28895 states and 44527 transitions. [2022-11-22 02:19:18,056 INFO L78 Accepts]: Start accepts. Automaton has 28895 states and 44527 transitions. Word has length 235 [2022-11-22 02:19:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:18,057 INFO L495 AbstractCegarLoop]: Abstraction has 28895 states and 44527 transitions. [2022-11-22 02:19:18,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-22 02:19:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28895 states and 44527 transitions. [2022-11-22 02:19:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-22 02:19:18,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:18,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:18,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:18,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1169482875, now seen corresponding path program 1 times [2022-11-22 02:19:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913327804] [2022-11-22 02:19:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-22 02:19:20,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913327804] [2022-11-22 02:19:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913327804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126188178] [2022-11-22 02:19:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:20,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:20,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:19:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 02:19:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-22 02:19:22,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:19:22,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126188178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:22,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:19:22,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 22 [2022-11-22 02:19:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679783478] [2022-11-22 02:19:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:22,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:19:22,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:19:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:19:22,222 INFO L87 Difference]: Start difference. First operand 28895 states and 44527 transitions. Second operand has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-22 02:19:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:28,461 INFO L93 Difference]: Finished difference Result 41461 states and 64330 transitions. [2022-11-22 02:19:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:19:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) Word has length 235 [2022-11-22 02:19:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:28,604 INFO L225 Difference]: With dead ends: 41461 [2022-11-22 02:19:28,604 INFO L226 Difference]: Without dead ends: 29612 [2022-11-22 02:19:28,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:19:28,784 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 714 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 3876 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 4254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:28,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1267 Invalid, 4254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3876 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 02:19:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29612 states. [2022-11-22 02:19:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29612 to 28983. [2022-11-22 02:19:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28983 states, 20013 states have (on average 1.4511067805926148) internal successors, (29041), 21170 states have internal predecessors, (29041), 6758 states have call successors, (6758), 1973 states have call predecessors, (6758), 2211 states have return successors, (8725), 6127 states have call predecessors, (8725), 6724 states have call successors, (8725) [2022-11-22 02:19:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28983 states to 28983 states and 44524 transitions. [2022-11-22 02:19:32,622 INFO L78 Accepts]: Start accepts. Automaton has 28983 states and 44524 transitions. Word has length 235 [2022-11-22 02:19:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:32,622 INFO L495 AbstractCegarLoop]: Abstraction has 28983 states and 44524 transitions. [2022-11-22 02:19:32,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-22 02:19:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28983 states and 44524 transitions. [2022-11-22 02:19:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-22 02:19:32,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:32,650 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:32,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:32,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:32,862 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1481511972, now seen corresponding path program 1 times [2022-11-22 02:19:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:32,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021831633] [2022-11-22 02:19:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-22 02:19:33,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:33,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021831633] [2022-11-22 02:19:33,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021831633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296285778] [2022-11-22 02:19:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:33,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:33,126 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:33,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef39fe1-f618-41d6-a450-fd3e9b38452c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:19:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:19:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-22 02:19:34,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-22 02:19:35,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296285778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910496433] [2022-11-22 02:19:36,002 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2022-11-22 02:19:36,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:36,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:36,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:36,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs