./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9 --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- 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-6b4ec56 [2022-11-20 19:43:06,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:43:06,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:43:06,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:43:06,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:43:06,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:43:06,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:43:06,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:43:06,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:43:06,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:43:06,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:43:06,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:43:06,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:43:06,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:43:06,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:43:06,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:43:06,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:43:06,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:43:06,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:43:06,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:43:06,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:43:06,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:43:06,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:43:06,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:43:06,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:43:06,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:43:06,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:43:06,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:43:06,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:43:06,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:43:06,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:43:06,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:43:06,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:43:06,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:43:06,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:43:06,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:43:06,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:43:06,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:43:06,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:43:06,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:43:06,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:43:06,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:43:06,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:43:06,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:43:06,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:43:06,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:43:06,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:43:06,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:43:06,239 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:43:06,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:43:06,240 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:43:06,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:43:06,241 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:43:06,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:43:06,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:43:06,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:43:06,242 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:43:06,243 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:43:06,243 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:43:06,243 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:43:06,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:43:06,244 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:43:06,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:43:06,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:43:06,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:43:06,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:43:06,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:43:06,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:43:06,247 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:43:06,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:43:06,247 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:43:06,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:43:06,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:43:06,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:43:06,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:06,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:43:06,250 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:43:06,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:43:06,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:43:06,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:43:06,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:43:06,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:43:06,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:43:06,253 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_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2022-11-20 19:43:06,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:43:06,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:43:06,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:43:06,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:43:06,614 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:43:06,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-20 19:43:09,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:43:09,981 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:43:09,981 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-20 19:43:10,001 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/data/200be0843/6d6aac1a8213447a883c51e6fc5499e3/FLAG491295947 [2022-11-20 19:43:10,016 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/data/200be0843/6d6aac1a8213447a883c51e6fc5499e3 [2022-11-20 19:43:10,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:43:10,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:43:10,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:10,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:43:10,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:43:10,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba45eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10, skipping insertion in model container [2022-11-20 19:43:10,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:43:10,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:43:10,536 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_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-20 19:43:10,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:10,626 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:43:10,704 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_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-20 19:43:10,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:10,813 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:43:10,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10 WrapperNode [2022-11-20 19:43:10,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:10,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:10,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:43:10,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:43:10,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,934 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2022-11-20 19:43:10,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:10,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:43:10,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:43:10,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:43:10,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:10,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:43:11,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:43:11,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:43:11,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:43:11,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (1/1) ... [2022-11-20 19:43:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:11,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:43:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:43:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:43:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-20 19:43:11,167 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-20 19:43:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 19:43:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 19:43:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 19:43:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 19:43:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 19:43:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 19:43:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-20 19:43:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-20 19:43:11,169 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 19:43:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 19:43:11,169 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 19:43:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 19:43:11,169 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 19:43:11,170 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 19:43:11,170 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 19:43:11,170 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 19:43:11,170 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 19:43:11,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 19:43:11,170 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 19:43:11,171 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 19:43:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 19:43:11,172 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 19:43:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 19:43:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 19:43:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 19:43:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 19:43:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-20 19:43:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-20 19:43:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 19:43:11,174 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 19:43:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 19:43:11,174 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 19:43:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-20 19:43:11,174 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-20 19:43:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 19:43:11,175 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 19:43:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 19:43:11,175 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 19:43:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 19:43:11,176 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 19:43:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:43:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 19:43:11,176 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 19:43:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 19:43:11,177 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 19:43:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 19:43:11,178 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 19:43:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 19:43:11,178 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 19:43:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:43:11,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:43:11,179 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 19:43:11,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 19:43:11,399 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:43:11,406 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:43:12,654 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:43:13,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:43:13,485 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 19:43:13,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:13 BoogieIcfgContainer [2022-11-20 19:43:13,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:43:13,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:43:13,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:43:13,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:43:13,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:43:10" (1/3) ... [2022-11-20 19:43:13,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624d92b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:13, skipping insertion in model container [2022-11-20 19:43:13,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:10" (2/3) ... [2022-11-20 19:43:13,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624d92b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:13, skipping insertion in model container [2022-11-20 19:43:13,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:13" (3/3) ... [2022-11-20 19:43:13,502 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2022-11-20 19:43:13,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:43:13,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:43:13,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:43:13,620 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;@5a26d1c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:43:13,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:43:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-20 19:43:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 19:43:13,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:13,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:13,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash -414763503, now seen corresponding path program 1 times [2022-11-20 19:43:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455005694] [2022-11-20 19:43:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:13,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:43:14,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455005694] [2022-11-20 19:43:14,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455005694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:14,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:14,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:43:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433668256] [2022-11-20 19:43:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:14,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:43:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:14,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:43:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:43:14,771 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 19:43:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:16,249 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-11-20 19:43:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:43:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-11-20 19:43:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:16,279 INFO L225 Difference]: With dead ends: 1150 [2022-11-20 19:43:16,282 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 19:43:16,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:43:16,298 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 546 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:16,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2990 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 19:43:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 19:43:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-11-20 19:43:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-11-20 19:43:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-11-20 19:43:16,441 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-11-20 19:43:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:16,441 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-11-20 19:43:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 19:43:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-11-20 19:43:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 19:43:16,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:16,448 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:43:16,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -415147964, now seen corresponding path program 1 times [2022-11-20 19:43:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067444640] [2022-11-20 19:43:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:43:16,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067444640] [2022-11-20 19:43:16,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067444640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:16,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:16,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:43:16,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120922816] [2022-11-20 19:43:16,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:43:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:43:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:43:16,958 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 19:43:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:18,237 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-11-20 19:43:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:43:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2022-11-20 19:43:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:18,261 INFO L225 Difference]: With dead ends: 2669 [2022-11-20 19:43:18,261 INFO L226 Difference]: Without dead ends: 1941 [2022-11-20 19:43:18,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:43:18,277 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 849 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 4041 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:18,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 4041 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 19:43:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-20 19:43:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-11-20 19:43:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-11-20 19:43:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-11-20 19:43:18,449 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2022-11-20 19:43:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:18,450 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-11-20 19:43:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 19:43:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-11-20 19:43:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 19:43:18,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:18,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:43:18,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1728178894, now seen corresponding path program 1 times [2022-11-20 19:43:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38810386] [2022-11-20 19:43:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:18,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:43:18,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:18,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38810386] [2022-11-20 19:43:18,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38810386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:18,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043442073] [2022-11-20 19:43:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:18,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:18,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:18,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:18,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:43:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:43:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:43:19,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043442073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:19,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:19,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:43:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629325721] [2022-11-20 19:43:19,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:43:19,317 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 19:43:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:19,713 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-11-20 19:43:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-11-20 19:43:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:19,742 INFO L225 Difference]: With dead ends: 3959 [2022-11-20 19:43:19,742 INFO L226 Difference]: Without dead ends: 2584 [2022-11-20 19:43:19,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:43:19,759 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:19,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-11-20 19:43:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-11-20 19:43:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-11-20 19:43:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-11-20 19:43:19,955 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2022-11-20 19:43:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:19,956 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-11-20 19:43:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 19:43:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-11-20 19:43:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 19:43:19,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:19,960 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:19,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:20,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1342972250, now seen corresponding path program 1 times [2022-11-20 19:43:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:20,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195896867] [2022-11-20 19:43:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:43:20,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195896867] [2022-11-20 19:43:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195896867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915505675] [2022-11-20 19:43:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:20,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:20,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:20,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:43:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:43:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:43:21,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915505675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:21,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:21,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:43:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302082913] [2022-11-20 19:43:21,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:21,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:21,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:43:21,050 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 19:43:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:21,454 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-11-20 19:43:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:21,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-11-20 19:43:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:21,480 INFO L225 Difference]: With dead ends: 5622 [2022-11-20 19:43:21,480 INFO L226 Difference]: Without dead ends: 3125 [2022-11-20 19:43:21,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:43:21,498 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 559 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:21,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-11-20 19:43:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-11-20 19:43:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-11-20 19:43:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-11-20 19:43:21,700 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-11-20 19:43:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:21,701 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-11-20 19:43:21,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 19:43:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-11-20 19:43:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 19:43:21,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:21,705 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 19:43:21,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:21,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:21,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1934255269, now seen corresponding path program 1 times [2022-11-20 19:43:21,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:21,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803799730] [2022-11-20 19:43:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:21,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:43:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803799730] [2022-11-20 19:43:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803799730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991065022] [2022-11-20 19:43:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:22,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:22,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:22,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:43:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:43:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:43:23,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:23,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991065022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:23,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:23,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 19:43:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569365364] [2022-11-20 19:43:23,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:43:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:43:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:43:23,143 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 19:43:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:23,733 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-11-20 19:43:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:43:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-11-20 19:43:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:23,782 INFO L225 Difference]: With dead ends: 6167 [2022-11-20 19:43:23,782 INFO L226 Difference]: Without dead ends: 3902 [2022-11-20 19:43:23,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:23,799 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:23,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:43:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-11-20 19:43:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-11-20 19:43:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-11-20 19:43:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-11-20 19:43:24,066 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 87 [2022-11-20 19:43:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-11-20 19:43:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 19:43:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-11-20 19:43:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 19:43:24,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:24,070 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:24,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:24,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1975805511, now seen corresponding path program 1 times [2022-11-20 19:43:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497105610] [2022-11-20 19:43:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:43:24,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:24,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497105610] [2022-11-20 19:43:24,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497105610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638499121] [2022-11-20 19:43:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:24,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:24,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:24,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:24,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:43:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:25,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:43:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:43:25,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:25,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638499121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:25,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:25,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-20 19:43:25,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922147432] [2022-11-20 19:43:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:43:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:43:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:25,595 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 19:43:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:26,795 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-11-20 19:43:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-11-20 19:43:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:26,820 INFO L225 Difference]: With dead ends: 5778 [2022-11-20 19:43:26,821 INFO L226 Difference]: Without dead ends: 3325 [2022-11-20 19:43:26,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:43:26,840 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 519 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:26,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 2356 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 19:43:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-11-20 19:43:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-11-20 19:43:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-11-20 19:43:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-11-20 19:43:27,187 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 89 [2022-11-20 19:43:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:27,188 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-11-20 19:43:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 19:43:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-11-20 19:43:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 19:43:27,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:27,193 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:27,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:27,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2022107844, now seen corresponding path program 1 times [2022-11-20 19:43:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419466924] [2022-11-20 19:43:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:43:28,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419466924] [2022-11-20 19:43:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419466924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326029662] [2022-11-20 19:43:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:28,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:28,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:28,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:43:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:43:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:43:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:43:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:43:28,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326029662] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:28,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:43:28,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-20 19:43:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858200963] [2022-11-20 19:43:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:28,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:43:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:43:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:43:28,985 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 19:43:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:33,311 INFO L93 Difference]: Finished difference Result 8634 states and 14349 transitions. [2022-11-20 19:43:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:43:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 91 [2022-11-20 19:43:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:33,370 INFO L225 Difference]: With dead ends: 8634 [2022-11-20 19:43:33,370 INFO L226 Difference]: Without dead ends: 6545 [2022-11-20 19:43:33,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 19:43:33,451 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 2371 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:33,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 3390 Invalid, 3991 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1047 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 19:43:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2022-11-20 19:43:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 6050. [2022-11-20 19:43:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4287 states have (on average 1.5264753907161186) internal successors, (6544), 4523 states have internal predecessors, (6544), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 417 states have return successors, (1858), 1292 states have call predecessors, (1858), 1337 states have call successors, (1858) [2022-11-20 19:43:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 9747 transitions. [2022-11-20 19:43:34,090 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 9747 transitions. Word has length 91 [2022-11-20 19:43:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:34,092 INFO L495 AbstractCegarLoop]: Abstraction has 6050 states and 9747 transitions. [2022-11-20 19:43:34,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 19:43:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 9747 transitions. [2022-11-20 19:43:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 19:43:34,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:34,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:34,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:34,305 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash 756901966, now seen corresponding path program 1 times [2022-11-20 19:43:34,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:34,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765970295] [2022-11-20 19:43:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:43:34,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765970295] [2022-11-20 19:43:34,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765970295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:34,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882639237] [2022-11-20 19:43:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:34,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:34,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:34,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:34,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:43:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:43:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:43:35,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:35,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882639237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:35,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:35,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 19:43:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92480357] [2022-11-20 19:43:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:35,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:43:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:43:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:43:35,544 INFO L87 Difference]: Start difference. First operand 6050 states and 9747 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-20 19:43:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:36,593 INFO L93 Difference]: Finished difference Result 10883 states and 17626 transitions. [2022-11-20 19:43:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:43:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-11-20 19:43:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:36,645 INFO L225 Difference]: With dead ends: 10883 [2022-11-20 19:43:36,646 INFO L226 Difference]: Without dead ends: 6066 [2022-11-20 19:43:36,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:36,676 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 419 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:36,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 19:43:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2022-11-20 19:43:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 6050. [2022-11-20 19:43:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4287 states have (on average 1.5264753907161186) internal successors, (6544), 4523 states have internal predecessors, (6544), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 417 states have return successors, (1850), 1292 states have call predecessors, (1850), 1337 states have call successors, (1850) [2022-11-20 19:43:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 9739 transitions. [2022-11-20 19:43:37,243 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 9739 transitions. Word has length 96 [2022-11-20 19:43:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:37,244 INFO L495 AbstractCegarLoop]: Abstraction has 6050 states and 9739 transitions. [2022-11-20 19:43:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-20 19:43:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 9739 transitions. [2022-11-20 19:43:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 19:43:37,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:37,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:37,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:37,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 19:43:37,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1154205739, now seen corresponding path program 1 times [2022-11-20 19:43:37,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:37,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357361651] [2022-11-20 19:43:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:37,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:43:38,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:38,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357361651] [2022-11-20 19:43:38,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357361651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:38,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234681505] [2022-11-20 19:43:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:38,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:38,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:38,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:38,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:43:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:43:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:43:38,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234681505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:38,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-20 19:43:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182627949] [2022-11-20 19:43:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:38,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:43:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:43:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:38,615 INFO L87 Difference]: Start difference. First operand 6050 states and 9739 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:39,212 INFO L93 Difference]: Finished difference Result 11579 states and 19108 transitions. [2022-11-20 19:43:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 121 [2022-11-20 19:43:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:39,260 INFO L225 Difference]: With dead ends: 11579 [2022-11-20 19:43:39,260 INFO L226 Difference]: Without dead ends: 6374 [2022-11-20 19:43:39,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:39,292 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3613 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:39,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3613 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2022-11-20 19:43:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 6222. [2022-11-20 19:43:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 4403 states have (on average 1.5126050420168067) internal successors, (6660), 4651 states have internal predecessors, (6660), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1336 states have call predecessors, (2177), 1337 states have call successors, (2177) [2022-11-20 19:43:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 10182 transitions. [2022-11-20 19:43:39,950 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 10182 transitions. Word has length 121 [2022-11-20 19:43:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:39,950 INFO L495 AbstractCegarLoop]: Abstraction has 6222 states and 10182 transitions. [2022-11-20 19:43:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 10182 transitions. [2022-11-20 19:43:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 19:43:39,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:39,958 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:39,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:40,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 19:43:40,167 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash -132933723, now seen corresponding path program 1 times [2022-11-20 19:43:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625993160] [2022-11-20 19:43:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:43:40,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:40,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625993160] [2022-11-20 19:43:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625993160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340719742] [2022-11-20 19:43:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:40,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:40,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:40,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:43:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:43:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:43:41,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:41,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340719742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:41,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:41,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-20 19:43:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916655433] [2022-11-20 19:43:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:43:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:43:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:41,373 INFO L87 Difference]: Start difference. First operand 6222 states and 10182 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:42,056 INFO L93 Difference]: Finished difference Result 11859 states and 19745 transitions. [2022-11-20 19:43:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:42,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2022-11-20 19:43:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:42,100 INFO L225 Difference]: With dead ends: 11859 [2022-11-20 19:43:42,100 INFO L226 Difference]: Without dead ends: 6490 [2022-11-20 19:43:42,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:42,129 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 13 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:42,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3662 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2022-11-20 19:43:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6250. [2022-11-20 19:43:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6250 states, 4431 states have (on average 1.5093658316407133) internal successors, (6688), 4651 states have internal predecessors, (6688), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1364 states have call predecessors, (2177), 1337 states have call successors, (2177) [2022-11-20 19:43:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 10210 transitions. [2022-11-20 19:43:42,584 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 10210 transitions. Word has length 122 [2022-11-20 19:43:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:42,584 INFO L495 AbstractCegarLoop]: Abstraction has 6250 states and 10210 transitions. [2022-11-20 19:43:42,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 10210 transitions. [2022-11-20 19:43:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 19:43:42,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:42,590 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:42,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 19:43:42,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:43:42,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash -584114713, now seen corresponding path program 1 times [2022-11-20 19:43:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:42,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017190029] [2022-11-20 19:43:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:43:43,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017190029] [2022-11-20 19:43:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017190029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127919506] [2022-11-20 19:43:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:43,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:43,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:43:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:43:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:43:43,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:43,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127919506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:43,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:43,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-20 19:43:43,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013094183] [2022-11-20 19:43:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:43,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:43:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:43:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:43,911 INFO L87 Difference]: Start difference. First operand 6250 states and 10210 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:44,541 INFO L93 Difference]: Finished difference Result 11915 states and 19801 transitions. [2022-11-20 19:43:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2022-11-20 19:43:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:44,592 INFO L225 Difference]: With dead ends: 11915 [2022-11-20 19:43:44,592 INFO L226 Difference]: Without dead ends: 6518 [2022-11-20 19:43:44,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:43:44,626 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 13 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:44,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3642 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6518 states. [2022-11-20 19:43:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6518 to 6278. [2022-11-20 19:43:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 4459 states have (on average 1.5061673020856694) internal successors, (6716), 4651 states have internal predecessors, (6716), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1392 states have call predecessors, (2177), 1337 states have call successors, (2177) [2022-11-20 19:43:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 10238 transitions. [2022-11-20 19:43:45,104 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 10238 transitions. Word has length 122 [2022-11-20 19:43:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:45,104 INFO L495 AbstractCegarLoop]: Abstraction has 6278 states and 10238 transitions. [2022-11-20 19:43:45,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-20 19:43:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 10238 transitions. [2022-11-20 19:43:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 19:43:45,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:45,112 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:45,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 19:43:45,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -501436400, now seen corresponding path program 1 times [2022-11-20 19:43:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509481618] [2022-11-20 19:43:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:43:45,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509481618] [2022-11-20 19:43:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509481618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:45,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812243146] [2022-11-20 19:43:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:45,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:45,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:45,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:43:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:43:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:43:46,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:46,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812243146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:46,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 19:43:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754359466] [2022-11-20 19:43:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:43:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:43:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:43:46,375 INFO L87 Difference]: Start difference. First operand 6278 states and 10238 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 19:43:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:47,257 INFO L93 Difference]: Finished difference Result 12963 states and 21778 transitions. [2022-11-20 19:43:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:43:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 132 [2022-11-20 19:43:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:47,318 INFO L225 Difference]: With dead ends: 12963 [2022-11-20 19:43:47,318 INFO L226 Difference]: Without dead ends: 6030 [2022-11-20 19:43:47,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:43:47,367 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 256 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 2861 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:43:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6030 states. [2022-11-20 19:43:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6030 to 6030. [2022-11-20 19:43:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 4260 states have (on average 1.4774647887323944) internal successors, (6294), 4452 states have internal predecessors, (6294), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 457 states have return successors, (2112), 1349 states have call predecessors, (2112), 1304 states have call successors, (2112) [2022-11-20 19:43:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 9718 transitions. [2022-11-20 19:43:47,909 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 9718 transitions. Word has length 132 [2022-11-20 19:43:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:47,913 INFO L495 AbstractCegarLoop]: Abstraction has 6030 states and 9718 transitions. [2022-11-20 19:43:47,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 19:43:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 9718 transitions. [2022-11-20 19:43:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 19:43:47,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:47,923 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:47,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:48,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:48,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:48,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2106601047, now seen corresponding path program 1 times [2022-11-20 19:43:48,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:48,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134601602] [2022-11-20 19:43:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 19:43:48,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134601602] [2022-11-20 19:43:48,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134601602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:48,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036480277] [2022-11-20 19:43:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:48,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:48,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:48,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:43:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:43:49,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:43:49,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:49,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036480277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:49,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:49,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 19:43:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653013358] [2022-11-20 19:43:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:43:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:43:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:43:49,226 INFO L87 Difference]: Start difference. First operand 6030 states and 9718 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 19:43:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:49,953 INFO L93 Difference]: Finished difference Result 13038 states and 21458 transitions. [2022-11-20 19:43:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 139 [2022-11-20 19:43:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:50,011 INFO L225 Difference]: With dead ends: 13038 [2022-11-20 19:43:50,011 INFO L226 Difference]: Without dead ends: 7677 [2022-11-20 19:43:50,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:43:50,046 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 277 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:50,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 2851 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:43:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7677 states. [2022-11-20 19:43:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7677 to 7677. [2022-11-20 19:43:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 5668 states have (on average 1.5047635850388144) internal successors, (8529), 5891 states have internal predecessors, (8529), 1492 states have call successors, (1492), 400 states have call predecessors, (1492), 516 states have return successors, (2292), 1529 states have call predecessors, (2292), 1484 states have call successors, (2292) [2022-11-20 19:43:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 12313 transitions. [2022-11-20 19:43:50,615 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 12313 transitions. Word has length 139 [2022-11-20 19:43:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:50,616 INFO L495 AbstractCegarLoop]: Abstraction has 7677 states and 12313 transitions. [2022-11-20 19:43:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 19:43:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 12313 transitions. [2022-11-20 19:43:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 19:43:50,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:50,629 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:50,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 19:43:50,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 19:43:50,838 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1163519774, now seen corresponding path program 1 times [2022-11-20 19:43:50,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:50,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361305261] [2022-11-20 19:43:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:43:51,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:51,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361305261] [2022-11-20 19:43:51,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361305261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:51,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44700054] [2022-11-20 19:43:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:51,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:51,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:51,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:43:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 19:43:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:43:52,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:43:52,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44700054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:52,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:43:52,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-20 19:43:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907599368] [2022-11-20 19:43:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:43:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:43:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:43:52,592 INFO L87 Difference]: Start difference. First operand 7677 states and 12313 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 19:43:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:58,567 INFO L93 Difference]: Finished difference Result 31275 states and 52296 transitions. [2022-11-20 19:43:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:43:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 137 [2022-11-20 19:43:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:58,766 INFO L225 Difference]: With dead ends: 31275 [2022-11-20 19:43:58,767 INFO L226 Difference]: Without dead ends: 23870 [2022-11-20 19:43:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:43:58,854 INFO L413 NwaCegarLoop]: 2549 mSDtfsCounter, 2823 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2836 SdHoareTripleChecker+Valid, 6816 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2836 Valid, 6816 Invalid, 2903 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [322 Valid, 2581 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 19:43:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2022-11-20 19:44:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 20148. [2022-11-20 19:44:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20148 states, 15183 states have (on average 1.4774418757821248) internal successors, (22432), 15603 states have internal predecessors, (22432), 3529 states have call successors, (3529), 1080 states have call predecessors, (3529), 1435 states have return successors, (7127), 3656 states have call predecessors, (7127), 3511 states have call successors, (7127) [2022-11-20 19:44:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20148 states to 20148 states and 33088 transitions. [2022-11-20 19:44:00,755 INFO L78 Accepts]: Start accepts. Automaton has 20148 states and 33088 transitions. Word has length 137 [2022-11-20 19:44:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:00,756 INFO L495 AbstractCegarLoop]: Abstraction has 20148 states and 33088 transitions. [2022-11-20 19:44:00,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 19:44:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20148 states and 33088 transitions. [2022-11-20 19:44:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-20 19:44:00,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:00,783 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 19:44:00,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:00,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 19:44:00,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:44:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1051233269, now seen corresponding path program 1 times [2022-11-20 19:44:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:44:00,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699714997] [2022-11-20 19:44:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:44:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 19:44:01,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:44:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699714997] [2022-11-20 19:44:01,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699714997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:44:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558697353] [2022-11-20 19:44:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:01,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:01,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:01,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:44:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:01,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:44:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:44:01,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:01,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558697353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:01,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:44:01,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-20 19:44:01,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377420481] [2022-11-20 19:44:01,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:01,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:01,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:44:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:44:01,788 INFO L87 Difference]: Start difference. First operand 20148 states and 33088 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 19:44:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:03,521 INFO L93 Difference]: Finished difference Result 40221 states and 68808 transitions. [2022-11-20 19:44:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 138 [2022-11-20 19:44:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:03,664 INFO L225 Difference]: With dead ends: 40221 [2022-11-20 19:44:03,664 INFO L226 Difference]: Without dead ends: 22533 [2022-11-20 19:44:04,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:44:04,123 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 105 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:04,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1372 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22533 states. [2022-11-20 19:44:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22533 to 20344. [2022-11-20 19:44:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20344 states, 15351 states have (on average 1.4740407791023387) internal successors, (22628), 15771 states have internal predecessors, (22628), 3557 states have call successors, (3557), 1080 states have call predecessors, (3557), 1435 states have return successors, (7155), 3684 states have call predecessors, (7155), 3539 states have call successors, (7155) [2022-11-20 19:44:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20344 states to 20344 states and 33340 transitions. [2022-11-20 19:44:05,892 INFO L78 Accepts]: Start accepts. Automaton has 20344 states and 33340 transitions. Word has length 138 [2022-11-20 19:44:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:05,892 INFO L495 AbstractCegarLoop]: Abstraction has 20344 states and 33340 transitions. [2022-11-20 19:44:05,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 19:44:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20344 states and 33340 transitions. [2022-11-20 19:44:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 19:44:05,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:05,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 19:44:05,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 19:44:06,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 19:44:06,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:44:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 94562958, now seen corresponding path program 1 times [2022-11-20 19:44:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:44:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750855238] [2022-11-20 19:44:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:44:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:44:06,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:44:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750855238] [2022-11-20 19:44:06,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750855238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:44:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586418691] [2022-11-20 19:44:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:06,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:06,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:06,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:06,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:44:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:07,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:44:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:44:07,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:07,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586418691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:07,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:44:07,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-20 19:44:07,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225393239] [2022-11-20 19:44:07,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:07,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:44:07,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:44:07,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:44:07,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:44:07,210 INFO L87 Difference]: Start difference. First operand 20344 states and 33340 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-20 19:44:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:13,509 INFO L93 Difference]: Finished difference Result 43553 states and 72728 transitions. [2022-11-20 19:44:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 19:44:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 139 [2022-11-20 19:44:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:13,796 INFO L225 Difference]: With dead ends: 43553 [2022-11-20 19:44:13,796 INFO L226 Difference]: Without dead ends: 22778 [2022-11-20 19:44:13,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-20 19:44:13,879 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 1745 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3777 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 3777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 1723 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 3777 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 19:44:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22778 states. [2022-11-20 19:44:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22778 to 20324. [2022-11-20 19:44:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20324 states, 15331 states have (on average 1.4743982779988258) internal successors, (22604), 15751 states have internal predecessors, (22604), 3557 states have call successors, (3557), 1080 states have call predecessors, (3557), 1435 states have return successors, (7155), 3684 states have call predecessors, (7155), 3539 states have call successors, (7155) [2022-11-20 19:44:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20324 states to 20324 states and 33316 transitions. [2022-11-20 19:44:16,074 INFO L78 Accepts]: Start accepts. Automaton has 20324 states and 33316 transitions. Word has length 139 [2022-11-20 19:44:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:16,075 INFO L495 AbstractCegarLoop]: Abstraction has 20324 states and 33316 transitions. [2022-11-20 19:44:16,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-20 19:44:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 20324 states and 33316 transitions. [2022-11-20 19:44:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-20 19:44:16,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:16,104 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 19:44:16,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 19:44:16,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:44:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1474063787, now seen corresponding path program 1 times [2022-11-20 19:44:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:44:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893045952] [2022-11-20 19:44:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:44:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 19:44:17,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:44:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893045952] [2022-11-20 19:44:17,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893045952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:44:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796913250] [2022-11-20 19:44:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:17,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:17,275 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:17,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:44:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:44:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:44:17,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:17,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796913250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:17,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:44:17,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-20 19:44:17,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24877067] [2022-11-20 19:44:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:17,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:17,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:44:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:44:17,830 INFO L87 Difference]: Start difference. First operand 20324 states and 33316 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-20 19:44:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:19,984 INFO L93 Difference]: Finished difference Result 46508 states and 78816 transitions. [2022-11-20 19:44:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 145 [2022-11-20 19:44:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:20,126 INFO L225 Difference]: With dead ends: 46508 [2022-11-20 19:44:20,126 INFO L226 Difference]: Without dead ends: 26196 [2022-11-20 19:44:20,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:44:20,234 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 486 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:20,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1323 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26196 states. [2022-11-20 19:44:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26196 to 25854. [2022-11-20 19:44:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25854 states, 19580 states have (on average 1.4786006128702758) internal successors, (28951), 20110 states have internal predecessors, (28951), 4461 states have call successors, (4461), 1347 states have call predecessors, (4461), 1812 states have return successors, (9194), 4636 states have call predecessors, (9194), 4443 states have call successors, (9194) [2022-11-20 19:44:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25854 states to 25854 states and 42606 transitions. [2022-11-20 19:44:22,815 INFO L78 Accepts]: Start accepts. Automaton has 25854 states and 42606 transitions. Word has length 145 [2022-11-20 19:44:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:22,816 INFO L495 AbstractCegarLoop]: Abstraction has 25854 states and 42606 transitions. [2022-11-20 19:44:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-20 19:44:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25854 states and 42606 transitions. [2022-11-20 19:44:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 19:44:22,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:22,837 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:22,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 19:44:23,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 19:44:23,045 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:44:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487041, now seen corresponding path program 1 times [2022-11-20 19:44:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:44:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329390901] [2022-11-20 19:44:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:44:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 19:44:23,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:44:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329390901] [2022-11-20 19:44:23,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329390901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:44:23,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833280398] [2022-11-20 19:44:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:23,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:23,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:23,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8159bc-23e3-4fca-a4e6-eddf86bc0320/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 19:44:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:44:24,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 19:44:25,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833280398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886211466] [2022-11-20 19:44:25,103 INFO L159 IcfgInterpreter]: Started Sifa with 126 locations of interest [2022-11-20 19:44:25,103 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:44:25,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:44:25,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:44:25,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:44:31,128 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-20 19:44:38,602 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-20 19:44:38,949 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-20 19:44:41,329 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-20 19:44:41,548 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-11-20 19:44:41,620 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-20 19:44:41,691 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-20 19:44:45,894 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-20 19:44:46,517 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-20 19:44:46,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:21,230 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:45:29,232 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:45:38,335 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:45:57,596 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:46:03,634 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 610 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:46:12,339 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:46:19,055 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)