./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/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 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 --- 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 19:48:17,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:48:17,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:48:17,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:48:17,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:48:17,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:48:17,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:48:17,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:48:17,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:48:17,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:48:17,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:48:17,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:48:17,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:48:17,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:48:17,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:48:17,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:48:17,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:48:17,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:48:17,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:48:17,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:48:17,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:48:17,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:48:17,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:48:17,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:48:17,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:48:17,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:48:17,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:48:17,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:48:17,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:48:17,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:48:17,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:48:17,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:48:17,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:48:17,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:48:17,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:48:17,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:48:17,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:48:17,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:48:17,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:48:17,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:48:17,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:48:17,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:48:17,225 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:48:17,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:48:17,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:48:17,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:48:17,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:48:17,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:48:17,228 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:48:17,228 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:48:17,228 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:48:17,228 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:48:17,229 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:48:17,230 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:48:17,230 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:48:17,230 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:48:17,230 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:48:17,231 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:48:17,231 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:48:17,231 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:48:17,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:48:17,233 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:48:17,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:48:17,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:48:17,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:48:17,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:48:17,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:48:17,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:48:17,235 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:48:17,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:48:17,235 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:48:17,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:48:17,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:48:17,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:48:17,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:17,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:48:17,237 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:48:17,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:48:17,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:48:17,238 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:48:17,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:48:17,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:48:17,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:48:17,238 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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 [2022-11-20 19:48:17,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:48:17,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:48:17,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:48:17,616 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:48:17,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:48:17,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-20 19:48:20,705 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:48:21,008 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:48:21,009 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-20 19:48:21,033 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/data/6b80088cf/0afd68f5d69842a6bfb42af92e85641c/FLAG2eaea008c [2022-11-20 19:48:21,048 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/data/6b80088cf/0afd68f5d69842a6bfb42af92e85641c [2022-11-20 19:48:21,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:48:21,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:48:21,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:21,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:48:21,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:48:21,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d63ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21, skipping insertion in model container [2022-11-20 19:48:21,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:48:21,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:48:21,300 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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-20 19:48:21,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:21,499 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:48:21,530 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_8c354a02-c69e-40c6-9eda-0045b9bc4d39/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-20 19:48:21,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:21,644 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:48:21,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21 WrapperNode [2022-11-20 19:48:21,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:21,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:21,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:48:21,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:48:21,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,750 INFO L138 Inliner]: procedures = 50, calls = 63, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 777 [2022-11-20 19:48:21,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:21,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:48:21,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:48:21,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:48:21,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:48:21,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:48:21,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:48:21,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:48:21,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (1/1) ... [2022-11-20 19:48:21,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:21,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:21,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:48:21,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c354a02-c69e-40c6-9eda-0045b9bc4d39/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:48:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:48:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-20 19:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-20 19:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 19:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 19:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-20 19:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-20 19:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-20 19:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-20 19:48:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-20 19:48:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-20 19:48:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-20 19:48:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-20 19:48:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:48:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:48:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:48:22,125 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:48:22,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:48:23,039 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:48:23,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:48:23,499 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-20 19:48:23,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:23 BoogieIcfgContainer [2022-11-20 19:48:23,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:48:23,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:48:23,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:48:23,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:48:23,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:48:21" (1/3) ... [2022-11-20 19:48:23,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b71acad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:23, skipping insertion in model container [2022-11-20 19:48:23,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:21" (2/3) ... [2022-11-20 19:48:23,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b71acad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:23, skipping insertion in model container [2022-11-20 19:48:23,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:23" (3/3) ... [2022-11-20 19:48:23,532 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2022-11-20 19:48:23,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:48:23,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:48:23,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:23,632 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;@16467719, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:23,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:48:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-20 19:48:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:23,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:23,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:23,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 626698193, now seen corresponding path program 1 times [2022-11-20 19:48:23,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:23,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648075302] [2022-11-20 19:48:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:24,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:24,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648075302] [2022-11-20 19:48:24,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648075302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:24,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:24,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:48:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691608910] [2022-11-20 19:48:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:48:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:48:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:48:24,376 INFO L87 Difference]: Start difference. First operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:24,949 INFO L93 Difference]: Finished difference Result 512 states and 807 transitions. [2022-11-20 19:48:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:48:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:24,962 INFO L225 Difference]: With dead ends: 512 [2022-11-20 19:48:24,962 INFO L226 Difference]: Without dead ends: 338 [2022-11-20 19:48:24,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:48:24,971 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 474 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:24,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 746 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:48:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-20 19:48:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2022-11-20 19:48:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 277 states have (on average 1.51985559566787) internal successors, (421), 279 states have internal predecessors, (421), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-20 19:48:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2022-11-20 19:48:25,040 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 73 [2022-11-20 19:48:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:25,041 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2022-11-20 19:48:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2022-11-20 19:48:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:25,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:25,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:25,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:48:25,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1203626834, now seen corresponding path program 1 times [2022-11-20 19:48:25,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:25,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373250046] [2022-11-20 19:48:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:25,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:25,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373250046] [2022-11-20 19:48:25,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373250046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:25,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:25,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:48:25,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565248492] [2022-11-20 19:48:25,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:48:25,256 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:26,327 INFO L93 Difference]: Finished difference Result 1945 states and 3133 transitions. [2022-11-20 19:48:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:26,353 INFO L225 Difference]: With dead ends: 1945 [2022-11-20 19:48:26,354 INFO L226 Difference]: Without dead ends: 1616 [2022-11-20 19:48:26,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:26,365 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 1115 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:26,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1214 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 19:48:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-20 19:48:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1580. [2022-11-20 19:48:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1327 states have (on average 1.5169555388093443) internal successors, (2013), 1335 states have internal predecessors, (2013), 192 states have call successors, (192), 60 states have call predecessors, (192), 60 states have return successors, (298), 185 states have call predecessors, (298), 192 states have call successors, (298) [2022-11-20 19:48:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2503 transitions. [2022-11-20 19:48:26,507 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2503 transitions. Word has length 73 [2022-11-20 19:48:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:26,508 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2503 transitions. [2022-11-20 19:48:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2503 transitions. [2022-11-20 19:48:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:26,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:26,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:26,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:48:26,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1443894163, now seen corresponding path program 1 times [2022-11-20 19:48:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234656349] [2022-11-20 19:48:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:26,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:26,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:26,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234656349] [2022-11-20 19:48:26,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234656349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:26,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:26,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:48:26,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101665593] [2022-11-20 19:48:26,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:26,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:48:26,764 INFO L87 Difference]: Start difference. First operand 1580 states and 2503 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:27,917 INFO L93 Difference]: Finished difference Result 6243 states and 10199 transitions. [2022-11-20 19:48:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:27,959 INFO L225 Difference]: With dead ends: 6243 [2022-11-20 19:48:27,959 INFO L226 Difference]: Without dead ends: 4668 [2022-11-20 19:48:27,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:27,978 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 1118 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:27,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1226 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 19:48:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-11-20 19:48:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4382. [2022-11-20 19:48:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3775 states have (on average 1.5282119205298013) internal successors, (5769), 3725 states have internal predecessors, (5769), 442 states have call successors, (442), 148 states have call predecessors, (442), 164 states have return successors, (900), 509 states have call predecessors, (900), 442 states have call successors, (900) [2022-11-20 19:48:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7111 transitions. [2022-11-20 19:48:28,447 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7111 transitions. Word has length 73 [2022-11-20 19:48:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:28,449 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7111 transitions. [2022-11-20 19:48:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7111 transitions. [2022-11-20 19:48:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:28,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:28,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:28,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:48:28,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1546695410, now seen corresponding path program 1 times [2022-11-20 19:48:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:28,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805539243] [2022-11-20 19:48:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:28,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:28,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805539243] [2022-11-20 19:48:28,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805539243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:28,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:28,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:48:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211307857] [2022-11-20 19:48:28,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:28,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:48:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:48:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:48:28,656 INFO L87 Difference]: Start difference. First operand 4382 states and 7111 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:29,525 INFO L93 Difference]: Finished difference Result 13053 states and 21820 transitions. [2022-11-20 19:48:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:48:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:29,577 INFO L225 Difference]: With dead ends: 13053 [2022-11-20 19:48:29,577 INFO L226 Difference]: Without dead ends: 8676 [2022-11-20 19:48:29,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:48:29,606 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 483 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:29,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 744 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:48:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2022-11-20 19:48:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 8644. [2022-11-20 19:48:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 7457 states have (on average 1.5187072549282554) internal successors, (11325), 7364 states have internal predecessors, (11325), 858 states have call successors, (858), 296 states have call predecessors, (858), 328 states have return successors, (1738), 984 states have call predecessors, (1738), 858 states have call successors, (1738) [2022-11-20 19:48:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 13921 transitions. [2022-11-20 19:48:30,380 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 13921 transitions. Word has length 73 [2022-11-20 19:48:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:30,380 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 13921 transitions. [2022-11-20 19:48:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 13921 transitions. [2022-11-20 19:48:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:30,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:30,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:30,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:48:30,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1315437167, now seen corresponding path program 1 times [2022-11-20 19:48:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:30,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065247648] [2022-11-20 19:48:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:30,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:30,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065247648] [2022-11-20 19:48:30,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065247648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:30,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:30,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:48:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740689351] [2022-11-20 19:48:30,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:30,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:48:30,519 INFO L87 Difference]: Start difference. First operand 8644 states and 13921 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:32,686 INFO L93 Difference]: Finished difference Result 31731 states and 53021 transitions. [2022-11-20 19:48:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:32,840 INFO L225 Difference]: With dead ends: 31731 [2022-11-20 19:48:32,840 INFO L226 Difference]: Without dead ends: 23092 [2022-11-20 19:48:32,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:32,890 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1108 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:32,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1220 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 19:48:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2022-11-20 19:48:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 21824. [2022-11-20 19:48:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21824 states, 19065 states have (on average 1.529976396538159) internal successors, (29169), 18612 states have internal predecessors, (29169), 1918 states have call successors, (1918), 696 states have call predecessors, (1918), 840 states have return successors, (4950), 2516 states have call predecessors, (4950), 1918 states have call successors, (4950) [2022-11-20 19:48:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21824 states to 21824 states and 36037 transitions. [2022-11-20 19:48:34,536 INFO L78 Accepts]: Start accepts. Automaton has 21824 states and 36037 transitions. Word has length 73 [2022-11-20 19:48:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:34,537 INFO L495 AbstractCegarLoop]: Abstraction has 21824 states and 36037 transitions. [2022-11-20 19:48:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21824 states and 36037 transitions. [2022-11-20 19:48:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:34,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:34,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:34,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:48:34,541 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 824015728, now seen corresponding path program 1 times [2022-11-20 19:48:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811999938] [2022-11-20 19:48:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:34,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:34,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811999938] [2022-11-20 19:48:34,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811999938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:34,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:34,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:48:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245751663] [2022-11-20 19:48:34,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:48:34,682 INFO L87 Difference]: Start difference. First operand 21824 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:38,214 INFO L93 Difference]: Finished difference Result 78571 states and 135821 transitions. [2022-11-20 19:48:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:38,552 INFO L225 Difference]: With dead ends: 78571 [2022-11-20 19:48:38,553 INFO L226 Difference]: Without dead ends: 56752 [2022-11-20 19:48:38,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:38,631 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1103 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:38,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1207 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 19:48:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56752 states. [2022-11-20 19:48:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56752 to 54052. [2022-11-20 19:48:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 47601 states have (on average 1.543265897775257) internal successors, (73461), 46028 states have internal predecessors, (73461), 4298 states have call successors, (4298), 1640 states have call predecessors, (4298), 2152 states have return successors, (13986), 6384 states have call predecessors, (13986), 4298 states have call successors, (13986) [2022-11-20 19:48:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 91745 transitions. [2022-11-20 19:48:42,863 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 91745 transitions. Word has length 73 [2022-11-20 19:48:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:42,864 INFO L495 AbstractCegarLoop]: Abstraction has 54052 states and 91745 transitions. [2022-11-20 19:48:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 91745 transitions. [2022-11-20 19:48:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:48:42,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:42,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:42,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 19:48:42,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash -940800881, now seen corresponding path program 1 times [2022-11-20 19:48:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330631710] [2022-11-20 19:48:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:43,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:43,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330631710] [2022-11-20 19:48:43,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330631710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:43,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:43,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:48:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432405099] [2022-11-20 19:48:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:48:43,027 INFO L87 Difference]: Start difference. First operand 54052 states and 91745 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:48:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:50,439 INFO L93 Difference]: Finished difference Result 195177 states and 351170 transitions. [2022-11-20 19:48:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-20 19:48:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:51,539 INFO L225 Difference]: With dead ends: 195177 [2022-11-20 19:48:51,540 INFO L226 Difference]: Without dead ends: 141130 [2022-11-20 19:48:51,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:51,766 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1101 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:51,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1208 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 19:48:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141130 states. [2022-11-20 19:49:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141130 to 134828. [2022-11-20 19:49:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134828 states, 119193 states have (on average 1.5529854941145873) internal successors, (185105), 113668 states have internal predecessors, (185105), 9994 states have call successors, (9994), 3960 states have call predecessors, (9994), 5640 states have return successors, (40894), 17200 states have call predecessors, (40894), 9994 states have call successors, (40894) [2022-11-20 19:49:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134828 states to 134828 states and 235993 transitions. [2022-11-20 19:49:01,764 INFO L78 Accepts]: Start accepts. Automaton has 134828 states and 235993 transitions. Word has length 73 [2022-11-20 19:49:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:01,765 INFO L495 AbstractCegarLoop]: Abstraction has 134828 states and 235993 transitions. [2022-11-20 19:49:01,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 19:49:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 134828 states and 235993 transitions. [2022-11-20 19:49:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 19:49:01,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:01,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:49:01,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 19:49:01,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 606133631, now seen corresponding path program 1 times [2022-11-20 19:49:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:01,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531174723] [2022-11-20 19:49:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:49:02,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531174723] [2022-11-20 19:49:02,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531174723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:02,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:49:02,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:49:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082652096] [2022-11-20 19:49:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:49:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:49:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:49:02,073 INFO L87 Difference]: Start difference. First operand 134828 states and 235993 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)